JP2023509391A - High strength 6xxx extruded alloy - Google Patents

Abstract

Some embodiments of the present disclosure relate to 6xxx aluminum alloys comprising silicon (Si ) from 0.75% to 1.15% by weight of magnesium (Mg), based on the total weight of said 6xxx aluminum alloy, provided that the weight ratio of Mg to Si in said 6xxx aluminum alloy is 0.68: 1.0 to 1.65:1.0 and 0.30 wt% to 0.8 wt% copper (Cu) based on the total weight of the 6xxx aluminum alloy. Some embodiments of the present disclosure include the steps of casting an exemplary 6xxx aluminum alloy, homogenizing said exemplary 6xxx aluminum alloy, extruding said exemplary 6xxx aluminum alloy, and said 6xxx aluminum alloy. It further relates to a method comprising aging the [Selection drawing] Fig. 1

Description

<Cross reference to related applications>
This application claims priority to U.S. Provisional Patent Application No. 62/952,614, filed Dec. 23, 2019, the entirety of which is hereby incorporated by reference for all purposes.

The present disclosure relates to alloys, more specifically aluminum alloys, and more specifically 6xxx aluminum extruded alloys.

Aluminum extrusion alloys are used in the automotive industry. Aluminum extrusion alloys can achieve very complex shapes and profiles. One such alloy is the 6xxx series. The 6xxx series alloys can be used in automobile body structures, suspensions, and drivetrain components.

Aluminum extruded alloys, such as 6xxx extruded alloys, have the potential to enable innovative lightweight designs through functional integration. By 2025, a standard vehicle will use approximately 42 pounds of aluminum extruded alloy.

There is a general need for improved extrusion alloys, particularly those with high strength, good extrusion properties, better performance at elevated temperatures, and improved corrosion performance. Several embodiments of the present disclosure meet this and other needs.

Applicable embodiments are defined by the claims, rather than by this summary. This Summary is a high-level overview of various aspects and introduces some concepts that are further described in the Detailed Description section below. This Summary is not intended to identify key or essential features of the claimed subject matter, nor is it intended to be used alone to determine the scope of the claimed subject matter. not a thing The subject matter should be understood by reference to the entire specification, some or all of the drawings, and appropriate portions of each claim.

Some embodiments of the present disclosure relate to 6xxx aluminum alloys comprising 0.70 wt% to 1.1 wt% silicon (Si) based on the total weight of the 6xxx aluminum alloy; 0.75% to 1.15% by weight magnesium (Mg), based on the total weight of the 6xxx aluminum alloy, provided that the weight ratio of Mg to Si in the 6xxx aluminum alloy is 0.68:1.0 to 1 .65:1.0 with the sum of Si and Mg present in an amount of 1.5% to 2.2% based on the total weight of the 6xxx aluminum alloy and 0.5% based on the total weight of the 6xxx aluminum alloy. 30 wt% to 0.8 wt% copper (Cu), 0.12 wt% to 0.3 wt% iron (Fe) based on the total weight of the 6xxx aluminum alloy, and 0.25% to 0.65% by weight manganese (Mn) based on the total weight of the 6xxx aluminum alloy and up to 0.2% by weight zirconium (Zr) based on the total weight of the 6xxx aluminum alloy chromium (Cr) up to 0.2 wt. % or less, the sum of said other elements being less than 0.15% by weight, based on the total weight of the 6xxx aluminum alloy.

In some embodiments, the other elements are selected from the group consisting of titanium (Ti), boron (B), zinc (Zn), molybdenum (Mo), nickel (Ni), and any combination thereof.

In some embodiments, up to 0.95 wt% Mg is in the _Mg2Si phase based on the total weight of the 6xxx aluminum alloy.

In some embodiments, up to 0.5 wt% Si is in the _Mg2Si phase based on the total weight of the 6xxx aluminum alloy.

In some embodiments, 0.16 wt% to 0.78 wt% Mg is in the Al ₅ Cu ₂ Mg ₈ Si ₅ (“Q”) phase, based on the total weight of the 6xxx aluminum alloy.

In some embodiments, 0.14 wt% to 0.68 wt% Si is in the Q phase based on the total weight of the 6xxx aluminum alloy.

In some embodiments, 0.1 wt% to 0.5 wt% Cu is in the Q phase based on the total weight of the 6xxx aluminum alloy.

In some embodiments, 0.11 wt% to 0.54 wt% Cu is in the Al ₂ Cu phase based on the total weight of the 6xxx aluminum alloy.

In some embodiments, the 6xxx aluminum alloy has a yield strength of at least 350 MPa.

In some embodiments, the 6xxx aluminum alloy has a yield strength of at least 370 MPa.

In some embodiments, the 6xxx aluminum alloy has a yield strength of 350 MPa to 450 MPa.

In some embodiments, the 6xxx aluminum alloy has a yield strength of 370 MPa to 400 MPa.

In some embodiments, the 6xxx aluminum alloy has an ultimate tensile strength (UTS) of at least 380 MPa.

In some embodiments, the 6xxx aluminum alloy has an ultimate tensile strength (UTS) of 380 MPa to 480 MPa.

Some embodiments of the present disclosure relate to 6xxx aluminum alloys, which consist essentially of 0.70 wt% to 1.1 wt% silicon based on the total weight of the 6xxx aluminum alloy ( Si) and magnesium (Mg) in an amount of 0.75% to 1.15% by weight based on the total weight of the 6xxx aluminum alloy, with the proviso that the sum of Si and Mg is based on the total weight of the 6xxx aluminum alloy. present in an amount of 1.5% to 2.2%, the weight ratio of Mg to Si in the 6xxx aluminum alloy is 0.68:1.0 to 1.65:1.0, and the total 0.30 wt% to 0.8 wt% copper (Cu), based on the weight; 0.12 wt% to 0.3 wt% iron (Fe), based on the total weight of the 6xxx aluminum alloy; 0.25 wt% to 0.65 wt% manganese (Mn) based on the total weight of the aluminum alloy and aluminum (Al), optionally up to 0.2 wt% based on the total weight of the 6xxx aluminum alloy % zirconium (Zr) and optionally chromium (Cr) in an amount up to 0.2% by weight based on the total weight of the 6xxx aluminum alloy and optionally other elements.

In some embodiments, when other elements are present, each element of the other elements is present in an amount of 0.05 wt% or less based on the total weight of the 6xxx aluminum alloy.

In some embodiments, the sum of other elements is less than 0.15 weight percent based on the total weight of the 6xxx aluminum alloy.

Some embodiments of the present disclosure relate to a 6xxx aluminum alloy, the 6xxx aluminum alloy comprising 0.70 wt% to 1.1 wt% silicon (Si), based on the total weight of the 6xxx aluminum alloy; 0.75% to 1.15% by weight magnesium (Mg), based on the total weight of the 6xxx aluminum alloy, provided that the weight ratio of Mg to Si in the 6xxx aluminum alloy is 0.68:1.0-1 .65:1.0 with 0.30 wt% to 0.8 wt% Cu (copper) based on the total weight of the 6xxx aluminum alloy.

In some embodiments, the sum of Si and Mg is present in an amount of 1.5% to 2.2% based on the total weight of the 6xxx aluminum alloy.

In some embodiments, the 6xxx aluminum alloy comprises 0.12 wt% to 0.3 wt% iron (Fe) based on the total weight of the 6xxx aluminum alloy.

In some embodiments, the 6xxx aluminum alloy comprises 0.25 wt% to 0.65 wt% manganese (Mn) based on the total weight of the 6xxx aluminum alloy.

In some embodiments, the 6xxx aluminum alloy comprises up to 0.2 wt% zirconium (Zr) based on the total weight of the 6xxx aluminum alloy.

In some embodiments, the 6xxx aluminum alloy comprises up to 0.2 wt% chromium (Cr) based on the total weight of the 6xxx aluminum alloy.

In some embodiments, the 6xxx aluminum alloy contains 0.05 wt% or less of other elements based on the total weight of the 6xxx aluminum alloy.

In some embodiments, the sum of other elements is less than 0.15 weight percent based on the total weight of the 6xxx aluminum alloy.

In some embodiments, other elements are selected from titanium (Ti), boron (B), zinc (Zn), molybdenum (Mo), nickel (Ni), or any combination thereof.

Some embodiments of the present disclosure are directed to a method of casting a 6xxx aluminum alloy, wherein the 6xxx aluminum alloy weighs 0.70 based on the total weight of the 6xxx aluminum alloy. Silicon (Si) in an amount of 0.75% to 1.15% by weight based on the total weight of the 6xxx aluminum alloy, provided that the 6xxx aluminum alloy The weight ratio of Mg to Si in the 6xxx aluminum alloy is 0.68:1.0 to 1.65:1.0 and the copper content is 0.30% to 0.8% by weight based on the total weight of the 6xxx aluminum alloy ( Cu); homogenizing the 6xxx aluminum alloy; extruding the 6xxx aluminum alloy; and aging the 6xxx aluminum alloy.

In some embodiments, homogenizing comprises heating the 6xxx aluminum alloy to a homogenization temperature (T _H ) below the solidus temperature (T _S ) of the 6xxx aluminum alloy.

In some embodiments, the homogenizing includes the Mg ₂ Si phase of the 6xxx aluminum alloy, the Al ₅ Cu ₂ Mg ₈ Si ₅ (“Q”) phase of the 6xxx aluminum alloy, the Al ₂ Cu phase of the 6xxx aluminum alloy, or any combination thereof, including heating the 6xxx aluminum alloy to T _H above the solvus temperature (T _Σ ).

In some embodiments, the T _Σ of at least one of the Mg ₂ Si phase, Q phase, or any combination thereof ranges from 520°C to 590°C.

In some embodiments, T _H ranges from 530°C to 600°C.

In some embodiments, the T _s of the 6xxx aluminum alloy is in the range of 540°C to 610°C.

In some embodiments, homogenizing comprises heating the 6xxx aluminum alloy from room temperature to T _H for 1-5 hours.

In some embodiments, homogenizing comprises soaking the 6xxx aluminum alloy in air for 2-12 hours.

In some embodiments, homogenizing further comprises air cooling the 6xxx aluminum alloy to room temperature.

In some embodiments, the extrusion is performed at an exit temperature T _E and T _E is controlled in the range of 450°C to 570°C.

In some embodiments, the method further comprises quenching the 6xxx aluminum alloy.

In some embodiments, the quenching is water cooling.

In some embodiments, quenching occurs between homogenizing and extruding.

In some embodiments, aging is performed for 1-128 hours.

In some embodiments, aging comprises natural aging, wherein natural aging is performed for 1 to 96 hours.

In some embodiments, aging comprises artificial aging, wherein artificial aging is performed at an artificial aging temperature (T _AA ) of 150° C.-210° C. for 1-32 hours.

Several embodiments of the present disclosure are described herein with reference to the accompanying drawings, which are provided for illustrative purposes only. It should now be emphasized that, with specific reference to the details of the drawings, the illustrated embodiments are exemplary only and are intended for purposes of exemplary illustration of the disclosed embodiments. In this regard, the description made with respect to the drawings will make it clear to those skilled in the art how the embodiments of the disclosure may be implemented.

FIG. 1 shows the dimensions of an exemplary extruded profile according to this disclosure.

FIG. 2 illustrates tensile specimen locations for non-limiting exemplary alloys of the present disclosure.

Detailed description of the invention

Among the advantages and improvements disclosed, other objects and advantages of the present disclosure will become apparent from the following description taken in conjunction with the accompanying drawings. Although detailed embodiments of the present disclosure are disclosed herein, it is to be understood that the disclosed embodiments are merely exemplary of the disclosure, which may be embodied in various forms. Furthermore, each example shown in relation to various embodiments of the present disclosure is intended to be illustrative and not limiting.

Throughout the specification and claims, the following terms shall have the meanings explicitly associated herein, unless the context clearly dictates otherwise. The terms "one embodiment," "one embodiment," and "some embodiments" as used herein may, but do not necessarily, refer to the same embodiment. . Further, the terms "other embodiment" and "some other embodiment" as used herein may, but do not necessarily, refer to different embodiments. All embodiments of the disclosure are intended to be combinable without departing from the scope or spirit of the disclosure.

As used herein, the term “based on” is not exclusive and allows for additional factors not recited unless the context clearly dictates otherwise. Also, throughout this specification, the terms "a/an" and "the" are inclusive of multiple references. In addition, the meaning of "in (in) (in)" includes "in (in) (in)" and "on (on)".

As used herein, terms such as "comprising," "including," and "having" limit the scope of a particular claim to the materials or steps recited by that claim. not something to do.

As used herein, the term "consisting essentially of" limits the scope of a particular claim to a particular material or step, It is limited to those that do not substantially affect the characteristics. In the context of the present disclosure, the basic novel features of a claim stating "consisting essentially of" may include yield strength, phase profile, tensile strength, or any combination thereof, It is not limited to these. In other words, in some embodiments where the claim recites "consisting essentially of," all elements unchanged (e.g., yield strength, phase profile, tensile strength, or any combination) falls within the scope of that claim.

As used herein, in the context of a claim using the term "consisting essentially of", the term "optionally" means that the claim's basic and novel features Non-limiting examples of non-affecting components are provided. If a claim using the term "consisting essentially of" recites at least one "optional" element, the at least one "optional" element is an exhaustive ) is not meant to be

As used herein, terms such as "consisting of" and "consisting of" limit the scope of a particular claim to the materials and steps recited in that claim.

All prior patents, publications, test methods referred to herein are incorporated by reference in their entirety.

As used herein, the term "aluminum alloy" means aluminum metal having soluble elements either in the aluminum lattice or in phases within the aluminum. Soluble elements include, but are not limited to, copper, iron, magnesium, nickel, silicon, zinc, chromium, manganese, titanium, vanadium, zirconium, tin, scandium, lithium, and the like. Elements can be added to affect the physical properties of aluminum alloys and to affect performance properties.

As used herein, the term "6xxx aluminum alloy" is defined in accordance with "Alloy and Temper Designation Systems for Aluminum - ANSI H35.1-2009".

As used herein, "yield strength" refers to the maximum stress that can be applied to a material before the resulting deformation becomes irreversible.

As used herein, "necking" refers to a form of tensile deformation in which strain is disproportionately localized at specific sites in a material.

As used herein, "tensile strength" or "ultimate tensile strength (UTS)" refers to the maximum amount of strain that can be applied to a material before necking occurs.

As used herein, "homogenizing" refers to at least one processing step that uniformly distributes the precipitates throughout the aluminum alloy. A non-limiting homogenization step is described below.

As used herein, "homogenization temperature" (T _H ) refers to the temperature or temperature range at which homogenization is performed.

As used herein, "solidus temperature" (T _S ) refers to the temperature or temperature range at or below which all phases of an aluminum alloy are completely solidified. At temperatures above _TS , the aluminum alloy may begin to melt.

As used herein, at least one phase of an aluminum alloy can be characterized as a "solid solution" when all constituents of the at least one phase have the same crystal structure.

As used herein, the "solvus temperature" (T _Σ ) of at least one phase of an aluminum alloy is the temperature above which all components of the at least one phase enter solution (e.g., solid solution or solution). Refers to the temperature or range of temperatures that form. If T _Σ <T _S , when the aluminum alloy is heated to a temperature between T _Σ of at least one phase and T of the aluminum alloy, all constituents of at least one phase form a solid solution having a single crystal structure. can do. In some non-limiting embodiments of the present disclosure, the single crystal structure may be a face centered cubic (fcc) crystal structure.

As used herein, "extruding" refers to at least one processing step that changes the cross-sectional shape of an aluminum alloy. Non-limiting extrusion steps are described below.

As used herein, "room temperature" is defined as any temperature suitable for human habitation and is the temperature at which laboratory experiments are commonly performed.

In some embodiments, room temperature ranges from 5°C to 35°C. In some embodiments, room temperature ranges from 10°C to 35°C. In some embodiments, room temperature ranges from 15°C to 35°C. In some embodiments, room temperature ranges from 20°C to 35°C. In some embodiments, room temperature ranges from 25°C to 30°C. In some embodiments, room temperature ranges from 35°C to 40°C. In some embodiments, room temperature ranges from 10°C to 35°C.

In some embodiments, room temperature ranges from 5°C to 30°C. In some embodiments, room temperature ranges from 5°C to 25°C. In some embodiments, room temperature ranges from 5°C to 20°C. In some embodiments, room temperature ranges from 5°C to 15°C. In some embodiments, room temperature ranges from 5°C to 10°C. In some embodiments, room temperature ranges from 5°C to 35°C.

In some embodiments, room temperature ranges from 10°C to 30°C. In some embodiments, room temperature ranges from 15°C to 25°C. In some embodiments, the room temperature is 20°C.

As used herein, "quenching" is the quenching of an aluminum alloy in a fluid (eg, water, air, or other fluid substance) to obtain specific material properties.

As used herein, "aging" refers to any treatment of an aluminum alloy that physically transforms the aluminum alloy over a set period of time to change the material properties of the aluminum alloy.

As used herein, "artificial aging" is aging performed at elevated temperature (ie, above room temperature).

As used herein, "natural aging" is aging performed at room temperature as defined herein.

Some embodiments of the present disclosure relate to 6xxx aluminum alloys. In some embodiments, the 6xxx aluminum alloys described herein are extruded, rolled plate, sheet in T4 temper, sheet in T6 temper, sheet in T7 temper, or any of them. Can be used in at least one of the combinations.

In some embodiments, the 6xxx aluminum alloys of the present disclosure comprise 0.70 wt% to 1.1 wt% silicon (Si) based on the total weight of the 6xxx aluminum alloy. In some embodiments, the 6xxx aluminum alloys of the present disclosure contain 0.75 wt% to 1.1 wt% Si based on the total weight of the 6xxx aluminum alloy. In some embodiments, the 6xxx aluminum alloys of the present disclosure contain 0.80 wt% to 1.1 wt% Si based on the total weight of the 6xxx aluminum alloy. In some embodiments, the 6xxx aluminum alloys of the present disclosure contain 0.85 wt% to 1.1 wt% Si based on the total weight of the 6xxx aluminum alloy. In some embodiments, the 6xxx aluminum alloys of the present disclosure contain 0.90 wt% to 1.1 wt% Si based on the total weight of the 6xxx aluminum alloy. In some embodiments, the 6xxx aluminum alloys of the present disclosure contain 0.95 wt% to 1.1 wt% Si based on the total weight of the 6xxx aluminum alloy. In some embodiments, the 6xxx aluminum alloys of the present disclosure contain 1.0 wt% to 1.1 wt% Si based on the total weight of the 6xxx aluminum alloy. In some embodiments, the 6xxx aluminum alloys of the present disclosure contain 1.05 wt% to 1.1 wt% Si based on the total weight of the 6xxx aluminum alloy.

In some embodiments, the 6xxx aluminum alloys of the present disclosure contain 0.7 wt% to 1.05 wt% Si based on the total weight of the 6xxx aluminum alloy. In some embodiments, the 6xxx aluminum alloys of the present disclosure contain 0.7 wt% to 1.0 wt% Si based on the total weight of the 6xxx aluminum alloy. In some embodiments, the 6xxx aluminum alloys of the present disclosure contain 0.7 wt% to 0.95 wt% Si based on the total weight of the 6xxx aluminum alloy. In some embodiments, the 6xxx aluminum alloys of the present disclosure contain 0.7 wt% to 0.9 wt% Si based on the total weight of the 6xxx aluminum alloy. In some embodiments, the 6xxx aluminum alloys of the present disclosure contain 0.7 wt% to 0.85 wt% Si based on the total weight of the 6xxx aluminum alloy. In some embodiments, the 6xxx aluminum alloys of the present disclosure contain 0.7 wt% to 0.8 wt% Si based on the total weight of the 6xxx aluminum alloy. In some embodiments, the 6xxx aluminum alloys of the present disclosure contain 0.7 wt% to 0.75 wt% Si based on the total weight of the 6xxx aluminum alloy.

In some embodiments, the 6xxx aluminum alloys of the present disclosure contain 0.75 wt% to 1.05 wt% Si based on the total weight of the 6xxx aluminum alloy. In some embodiments, the 6xxx aluminum alloys of the present disclosure contain 0.8 wt% to 1 wt% Si based on the total weight of the 6xxx aluminum alloy. In some embodiments, the 6xxx aluminum alloys of the present disclosure comprise 0.85 wt% to 0.95 wt% Si based on the total weight of the 6xxx aluminum alloy. In some embodiments, the 6xxx aluminum alloys of the present disclosure contain 0.9 wt% Si based on the total weight of the 6xxx aluminum alloy.

In some embodiments, the 6xxx aluminum alloys of the present disclosure comprise 0.75 wt% to 1.15 wt% magnesium (Mg) based on the total weight of the 6xxx aluminum alloy. In some embodiments, the 6xxx aluminum alloys of the present disclosure comprise 0.8 wt% to 1.15 wt% Mg based on the total weight of the 6xxx aluminum alloy. In some embodiments, the 6xxx aluminum alloys of the present disclosure comprise 0.85 wt% to 1.15 wt% Mg based on the total weight of the 6xxx aluminum alloy. In some embodiments, the 6xxx aluminum alloys of the present disclosure comprise 0.9 wt% to 1.15 wt% Mg based on the total weight of the 6xxx aluminum alloy. In some embodiments, the 6xxx aluminum alloys of the present disclosure comprise 0.95 wt% to 1.15 wt% Mg based on the total weight of the 6xxx aluminum alloy. In some embodiments, the 6xxx aluminum alloys of the present disclosure comprise 1.0 wt% to 1.15 wt% Mg based on the total weight of the 6xxx aluminum alloy. In some embodiments, the 6xxx aluminum alloys of the present disclosure comprise 1.05 wt% to 1.15 wt% Mg based on the total weight of the 6xxx aluminum alloy. In some embodiments, the 6xxx aluminum alloys of the present disclosure comprise 1.1 wt% to 1.15 wt% Mg based on the total weight of the 6xxx aluminum alloy.

In some embodiments, the 6xxx aluminum alloys of the present disclosure comprise 0.75 wt% to 1.1 wt% Mg based on the total weight of the 6xxx aluminum alloy. In some embodiments, the 6xxx aluminum alloys of the present disclosure comprise 0.75 wt% to 1.05 wt% Mg based on the total weight of the 6xxx aluminum alloy. In some embodiments, the 6xxx aluminum alloys of the present disclosure comprise 0.75 wt% to 1.0 wt% Mg based on the total weight of the 6xxx aluminum alloy. In some embodiments, the 6xxx aluminum alloys of the present disclosure comprise 0.75 wt% to 0.95 wt% Mg based on the total weight of the 6xxx aluminum alloy. In some embodiments, the 6xxx aluminum alloys of the present disclosure comprise 0.75 wt% to 0.9 wt% Mg based on the total weight of the 6xxx aluminum alloy. In some embodiments, the 6xxx aluminum alloys of the present disclosure comprise 0.75 wt% to 0.85 wt% Mg based on the total weight of the 6xxx aluminum alloy. In some embodiments, the 6xxx aluminum alloys of the present disclosure comprise 0.75 wt% to 0.8 wt% Mg based on the total weight of the 6xxx aluminum alloy.

In some embodiments, the 6xxx aluminum alloys of the present disclosure comprise 0.8 wt% to 1.1 wt% Mg based on the total weight of the 6xxx aluminum alloy. In some embodiments, the 6xxx aluminum alloys of the present disclosure comprise 0.85 wt% to 1.05 wt% Mg based on the total weight of the 6xxx aluminum alloy. In some embodiments, the 6xxx aluminum alloys of the present disclosure comprise 0.9 wt% to 1.0 wt% Mg based on the total weight of the 6xxx aluminum alloy. In some embodiments, the 6xxx aluminum alloys of the present disclosure comprise 0.95 weight percent Mg based on the total weight of the 6xxx aluminum alloy.

In some embodiments, the weight ratio of Mg to Si in the 6xxx aluminum alloy is from 0.68:1.0 to 1.65:1.0. In some embodiments, the weight ratio of Mg to Si in the 6xxx aluminum alloy is from 0.7:1.0 to 1.65:1.0. In some embodiments, the weight ratio of Mg to Si in the 6xxx aluminum alloy is from 0.8:1.0 to 1.65:1.0. In some embodiments, the weight ratio of Mg to Si in the 6xxx aluminum alloy is from 0.9:1.0 to 1.65:1.0. In some embodiments, the weight ratio of Mg to Si in the 6xxx aluminum alloy is from 1.0:1.0 to 1.65:1.0. In some embodiments, the weight ratio of Mg to Si in the 6xxx aluminum alloy is from 1.1:1.0 to 1.65:1.0. In some embodiments, the weight ratio of Mg to Si in the 6xxx aluminum alloy is from 1.2:1.0 to 1.65:1.0. In some embodiments, the weight ratio of Mg to Si in the 6xxx aluminum alloy is from 1.3:1.0 to 1.65:1.0. In some embodiments, the weight ratio of Mg to Si in the 6xxx aluminum alloy is from 1.4:1.0 to 1.65:1.0. In some embodiments, the weight ratio of Mg to Si in the 6xxx aluminum alloy is from 1.5:1.0 to 1.65:1.0. In some embodiments, the weight ratio of Mg to Si in the 6xxx aluminum alloy is from 1.6:1.0 to 1.65:1.0.

In some embodiments, the weight ratio of Mg to Si in the 6xxx aluminum alloy is from 0.68:1.0 to 1.6:1.0. In some embodiments, the weight ratio of Mg to Si in the 6xxx aluminum alloy is from 0.68:1.0 to 1.5:1.0. In some embodiments, the weight ratio of Mg to Si in the 6xxx aluminum alloy is from 0.68:1.0 to 1.4:1.0. In some embodiments, the weight ratio of Mg to Si in the 6xxx aluminum alloy is from 0.68:1.0 to 1.3:1.0. In some embodiments, the weight ratio of Mg to Si in the 6xxx aluminum alloy is from 0.68:1.0 to 1.2:1.0. In some embodiments, the weight ratio of Mg to Si in the 6xxx aluminum alloy is between 0.68:1.0 and 1.1:1.0. In some embodiments, the weight ratio of Mg to Si in the 6xxx aluminum alloy is from 0.68:1.0 to 1.0:1.0. In some embodiments, the weight ratio of Mg to Si in the 6xxx aluminum alloy is from 0.68:1.0 to 0.9:1.0. In some embodiments, the weight ratio of Mg to Si in the 6xxx aluminum alloy is between 0.68:1.0 and 0.8:1.0. In some embodiments, the weight ratio of Mg to Si in the 6xxx aluminum alloy is between 0.68:1.0 and 0.7:1.0.

In some embodiments, the weight ratio of Mg to Si in the 6xxx aluminum alloy is from 0.7:1.0 to 1.6:1.0. In some embodiments, the weight ratio of Mg to Si in the 6xxx aluminum alloy is from 0.8:1.0 to 1.5:1.0. In some embodiments, the weight ratio of Mg to Si in the 6xxx aluminum alloy is from 0.9:1.0 to 1.4:1.0. In some embodiments, the weight ratio of Mg to Si in the 6xxx aluminum alloy is from 1.0:1.0 to 1.3:1.0. In some embodiments, the weight ratio of Mg to Si in the 6xxx aluminum alloy is from 1.1:1.0 to 1.2:1.0.

In some embodiments, the sum of Si and Mg is present in an amount of 1.5% to 2.2% based on the total weight of the 6xxx aluminum alloy. In some embodiments, the sum of Si and Mg is present in an amount of 1.6% to 2.2% based on the total weight of the 6xxx aluminum alloy. In some embodiments, the sum of Si and Mg is present in an amount of 1.7% to 2.2% based on the total weight of the 6xxx aluminum alloy. In some embodiments, the sum of Si and Mg is present in an amount of 1.8% to 2.2% based on the total weight of the 6xxx aluminum alloy. In some embodiments, the sum of Si and Mg is present in an amount of 1.9% to 2.2% based on the total weight of the 6xxx aluminum alloy. In some embodiments, the sum of Si and Mg is present in an amount of 2.0% to 2.2% based on the total weight of the 6xxx aluminum alloy. In some embodiments, the sum of Si and Mg is present in an amount of 2.1% to 2.2% based on the total weight of the 6xxx aluminum alloy.

In some embodiments, the sum of Si and Mg is present in an amount of 1.5% to 2.1% based on the total weight of the 6xxx aluminum alloy. In some embodiments, the sum of Si and Mg is present in an amount of 1.5% to 2.0% based on the total weight of the 6xxx aluminum alloy. In some embodiments, the sum of Si and Mg is present in an amount of 1.5% to 1.9% based on the total weight of the 6xxx aluminum alloy. In some embodiments, the sum of Si and Mg is present in an amount of 1.5% to 1.8% based on the total weight of the 6xxx aluminum alloy. In some embodiments, the sum of Si and Mg is present in an amount of 1.5% to 1.7% based on the total weight of the 6xxx aluminum alloy. In some embodiments, the sum of Si and Mg is present in an amount of 1.5% to 1.6% based on the total weight of the 6xxx aluminum alloy.

In some embodiments, the sum of Si and Mg is present in an amount of 1.6% to 2.1% based on the total weight of the 6xxx aluminum alloy. In some embodiments, the sum of Si and Mg is present in an amount of 1.7% to 2.0% based on the total weight of the 6xxx aluminum alloy. In some embodiments, the sum of Si and Mg is present in an amount of 1.8% to 1.9% based on the total weight of the 6xxx aluminum alloy.

In some embodiments, the 6xxx aluminum alloys of the present disclosure comprise 0.30 wt% to 0.8 wt% copper (Cu) based on the total weight of the 6xxx aluminum alloy. In some embodiments, Cu is present in an amount of 0.35 wt% to 0.8 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Cu is present in an amount of 0.4 wt% to 0.8 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Cu is present in an amount of 0.45 wt% to 0.8 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Cu is present in an amount of 0.5 wt% to 0.8 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Cu is present in an amount of 0.55 wt% to 0.8 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Cu is present in an amount of 0.6 wt% to 0.8 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Cu is present in an amount of 0.65 wt% to 0.8 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Cu is present in an amount of 0.7 wt% to 0.8 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Cu is present in an amount of 0.75 wt% to 0.8 wt% based on the total weight of the 6xxx aluminum alloy.

In some embodiments, Cu is present in an amount of 0.3 wt% to 0.75 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Cu is present in an amount of 0.3 wt% to 0.7 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Cu is present in an amount of 0.3 wt% to 0.65 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Cu is present in an amount of 0.3 wt% to 0.6 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Cu is present in an amount of 0.3 wt% to 0.55 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Cu is present in an amount of 0.3 wt% to 0.5 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Cu is present in an amount of 0.3 wt% to 0.45 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Cu is present in an amount of 0.3 wt% to 0.4 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Cu is present in an amount of 0.3 wt% to 0.35 wt% based on the total weight of the 6xxx aluminum alloy.

In some embodiments, Cu is present in an amount of 0.3 wt% to 0.7 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Cu is present in an amount of 0.35 wt% to 0.65 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Cu is present in an amount of 0.4 wt% to 0.6 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Cu is present in an amount of 0.45 wt% to 0.55 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Cu is present in an amount of 0.5 wt% based on the total weight of the 6xxx aluminum alloy.

In some embodiments, the 6xxx aluminum alloys of the present disclosure may contain iron (Fe) in an amount of 0.12 wt% to 0.3 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Fe may be present in an amount ranging from 0.15 wt% to 0.3 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Fe may be present in an amount ranging from 0.2 wt% to 0.3 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Fe may be present in an amount ranging from 0.25 wt% to 0.3 wt% based on the total weight of the 6xxx aluminum alloy.

In some embodiments, Fe may be present in an amount ranging from 0.12 wt% to 0.25 wt%. In some embodiments, Fe may be present in an amount ranging from 0.12 wt% to 0.2 wt%. In some embodiments, Fe may be present in an amount ranging from 0.12 wt% to 0.15 wt%.

In some embodiments, Fe may be present in an amount ranging from 0.12 wt% to 0.2 wt%. In some embodiments, Fe may be present in an amount of 0.15 wt%.

In some embodiments, the 6xxx aluminum alloys of the present disclosure may include manganese (Mn) in an amount of 0.25 wt% to 0.55 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Mn may be present in an amount of 0.3 wt% to 0.55 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Mn may be present in an amount of 0.35 wt% to 0.55 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Mn may be present in an amount of 0.4 wt% to 0.55 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Mn may be present in an amount of 0.45 wt% to 0.55 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Mn may be present in an amount of 0.5 wt% to 0.55 wt% based on the total weight of the 6xxx aluminum alloy.

In some embodiments, Mn may be present in an amount of 0.25 wt% to 0.5 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Mn may be present in an amount of 0.25 wt% to 0.45 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Mn may be present in an amount of 0.25 wt% to 0.4 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Mn may be present in an amount of 0.25 wt% to 0.35 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Mn may be present in an amount of 0.25 wt% to 0.3 wt% based on the total weight of the 6xxx aluminum alloy.

In some embodiments, Mn may be present in an amount of 0.3 wt% to 0.5 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Mn may be present in an amount of 0.35 wt% to 0.45 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Mn may be present in an amount of 0.4 wt% based on the total weight of the 6xxx aluminum alloy.

In some embodiments, the 6xxx aluminum alloys of the present disclosure may include zirconium (Zr). In some embodiments, Zr may be present in an amount up to 0.2 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Zr is present in an amount up to 0.1 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Zr is present in an amount of 0.1 wt% to 0.2 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, the 6xxx aluminum alloy does not contain Zr.

In some embodiments, the 6xxx aluminum alloys of the present disclosure may include chromium (Cr). In some embodiments, Cr may be present in an amount up to 0.2 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Cr may be present in an amount up to 0.18 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Cr may be present in an amount up to 0.16 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Cr may be present in an amount up to 0.14 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Cr may be present in an amount up to 0.12 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Cr may be present in an amount up to 0.1 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Cr may be present in an amount up to 0.8 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Cr may be present in an amount up to 0.06 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Cr may be present in an amount up to 0.04 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Cr may be present in an amount up to 0.02 wt% based on the total weight of the 6xxx aluminum alloy.

In some embodiments, Cr is present in an amount of 0.02 wt% to 0.2 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Cr is present in an amount of 0.04 wt% to 0.2 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Cr is present in an amount of 0.06 wt% to 0.2 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Cr is present in an amount of 0.08 wt% to 0.2 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Cr is present in an amount of 0.12 wt% to 0.2 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Cr is present in an amount of 0.14 wt% to 0.2 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Cr is present in an amount of 0.16 wt% to 0.2 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Cr is present in an amount of 0.18 wt% to 0.2 wt% based on the total weight of the 6xxx aluminum alloy.

In some embodiments, Cr is present in an amount of 0.02 wt% to 0.18 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Cr is present in an amount of 0.02 wt% to 0.16 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Cr is present in an amount of 0.02 wt% to 0.14 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Cr is present in an amount of 0.02 wt% to 0.12 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Cr is present in an amount of 0.02 wt% to 0.1 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Cr is present in an amount of 0.02 wt% to 0.08 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Cr is present in an amount of 0.02 wt% to 0.06 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Cr is present in an amount of 0.02 wt% to 0.04 wt% based on the total weight of the 6xxx aluminum alloy.

In some embodiments, Cr is present in an amount of 0.04 wt% to 0.18 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Cr is present in an amount of 0.06 wt% to 0.14 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Cr is present in an amount of 0.08 wt% to 0.12 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, Cr is present in an amount of 0.1 wt% based on the total weight of the 6xxx aluminum alloy.

In some embodiments, the 6xxx aluminum alloys of the present disclosure do not contain Cr.

In some embodiments, the 6xxx aluminum alloy includes other elements. In some embodiments, the other elements include at least one of titanium (Ti), boron (B), zinc (Zn), molybdenum (Mo), nickel (Ni), or any combination thereof. may contain. In some embodiments, other elements are selected from the group consisting of Ti, B, Zn, Mo, Ni, and any combination thereof. In some embodiments, other elements may contain impurities. In some embodiments, the 6xxx aluminum alloy does not contain other elements.

In some embodiments, each of the other elements is present in an amount of 0.05 wt% or less based on the total weight of the 6xxx aluminum alloy. In some embodiments, each of the other elements is present in an amount of 0.025 weight percent or less based on the total weight of the 6xxx aluminum alloy. In some embodiments, each of the other elements is present in an amount ranging from 0.05 wt% to 0.025 wt% based on the total weight of the 6xxx aluminum alloy.

In some embodiments, the sum of other elements is less than 0.15 weight percent based on the total weight of the 6xxx aluminum alloy. In some embodiments, the sum of other elements is less than 0.1 weight percent based on the total weight of the 6xxx aluminum alloy. In some embodiments, the sum of other elements is less than 0.05 weight percent based on the total weight of the 6xxx aluminum alloy. In some embodiments, the sum of other elements is 0.05 wt% to 0.15 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, the sum of other elements is 0.05 wt% to 0.1 wt% based on the total weight of the 6xxx aluminum alloy. In some embodiments, the sum of other elements is 0.1 wt% to 0.15 wt% based on the total weight of the 6xxx aluminum alloy.

In some embodiments, the 6xxx aluminum alloys of the present disclosure consist essentially of Si, Mg, Cu, Fe, Mn, and Al in any amount or range specified herein. In some embodiments in which the 6xxx alloy consists essentially of Si, Mg, Cu, Fe, Mn, and Al, the 6xxx alloy may optionally include at least one constituent. The optional at least one component is at least one of Cr, Zr, any other element described herein, or any combination thereof, in any amount or range defined herein may include, but are not limited to,

In some embodiments, the 6xxx aluminum alloys of the present disclosure consist of Si, Mg, Cu, Fe, Mn, Cr, and Zr in any amount or range specified herein, with the balance being Al and at least one other element described in the book. In some embodiments, the 6xxx aluminum alloys of the present disclosure consist of Si, Mg, Cu, Fe, Mn, Cr, and Zr in any amount or range specified herein, with the balance being Al and are several other elements described in the literature.

In some embodiments, the 6xxx aluminum alloys described herein may include a Mg ₂ Si phase. In some embodiments, up to 0.95 wt% Mg is in the _Mg2Si phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, up to 0.85 wt% Mg is in the _Mg2Si phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, up to 0.75 wt% Mg is in the _Mg2Si phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, up to 0.65 wt% Mg is in the _Mg2Si phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, up to 0.55 wt% Mg is in the _Mg2Si phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, up to 0.45 wt% Mg is in the _Mg2Si phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, up to 0.35 wt% Mg is in the _Mg2Si phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, up to 0.25 wt% Mg is in the _Mg2Si phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, up to 0.15 wt% Mg is in the _Mg2Si phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, up to 0.05 wt% Mg is in the _Mg2Si phase based on the total weight of the 6xxx aluminum alloy.

In some embodiments, 0.05 wt% to 0.95 wt% Mg is in the Mg ₂ Si phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.15 wt% to 0.95 wt% Mg is in the Mg ₂ Si phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.25 wt% to 0.95 wt% Mg is in the Mg ₂ Si phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.35 wt% to 0.95 wt% Mg is in the Mg ₂ Si phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.45 wt% to 0.95 wt% Mg is in the Mg ₂ Si phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.55 wt% to 0.95 wt% Mg is in the Mg ₂ Si phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.65 wt% to 0.95 wt% Mg is in the Mg ₂ Si phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.75 wt% to 0.95 wt% Mg is in the Mg ₂ Si phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.85 wt% to 0.95 wt% Mg is in the Mg ₂ Si phase based on the total weight of the 6xxx aluminum alloy.

In some embodiments, 0.05 wt% to 0.85 wt% Mg is in the Mg ₂ Si phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.05 wt% to 0.75 wt% Mg is in the Mg ₂ Si phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.05 wt% to 0.65 wt% Mg is in the Mg ₂ Si phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.05 wt% to 0.55 wt% Mg is in the Mg ₂ Si phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.05 wt% to 0.45 wt% Mg is in the Mg ₂ Si phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.05 wt% to 0.35 wt% Mg is in the Mg ₂ Si phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.05 wt% to 0.25 wt% Mg is in the Mg ₂ Si phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.05 wt% to 0.15 wt% Mg is in the Mg ₂ Si phase based on the total weight of the 6xxx aluminum alloy.

In some embodiments, 0.05 wt% to 0.85 wt% Mg is in the Mg ₂ Si phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.15 wt% to 0.75 wt% Mg is in the Mg ₂ Si phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.25 wt% to 0.65 wt% Mg is in the Mg ₂ Si phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.35 wt% to 0.55 wt% Mg is in the Mg ₂ Si phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.45 wt% Mg is in the _Mg2Si phase based on the total weight of the 6xxx aluminum alloy.

In some embodiments, up to 0.5 wt% Si is in the _Mg2Si phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, up to 0.4 wt% Si is in the _Mg2Si phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, up to 0.3 wt% Si is in the _Mg2Si phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, up to 0.2 wt% Si is in the _Mg2Si phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, up to 0.1 wt% Si is in the _Mg2Si phase based on the total weight of the 6xxx aluminum alloy.

In some embodiments, 0.1 wt% to 0.5 wt% Si is in the Mg ₂ Si phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.2 wt% to 0.5 wt% Si is in the Mg ₂ Si phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.3 wt% to 0.5 wt% Si is in the Mg ₂ Si phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.4 wt% to 0.5 wt% Si is in the Mg ₂ Si phase based on the total weight of the 6xxx aluminum alloy.

In some embodiments, 0.1 wt% to 0.5 wt% Si is in the Mg ₂ Si phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.1 wt% to 0.4 wt% Si is in the Mg ₂ Si phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.1 wt% to 0.3 wt% Si is in the Mg ₂ Si phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.1 wt% to 0.2 wt% Si is in the Mg ₂ Si phase based on the total weight of the 6xxx aluminum alloy.

In some embodiments, 0.2 wt% to 0.4 wt% Si is in the Mg ₂ Si phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.3% Si is in the Mg ₂ Si phase based on the total weight of the 6xxx aluminum alloy.

In some embodiments, the _6xxx aluminum alloys described herein may include the _Al5Cu2Mg8Si5 ("Q") _{phase .} In some embodiments, 0.16 wt% to 0.78 wt% Mg is in the Q phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.2 wt% to 0.78 wt% Mg is in the Q phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.3 wt% to 0.78 wt% Mg is in the Q phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.4 wt% to 0.78 wt% Mg is in the Q phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.5 wt% to 0.78 wt% Mg is in the Q phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.6 wt% to 0.78 wt% Mg is in the Q phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.7 wt% to 0.78 wt% Mg is in the Q phase based on the total weight of the 6xxx aluminum alloy.

In some embodiments, 0.16 wt% to 0.7 wt% Mg is in the Q phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.16 wt% to 0.6 wt% Mg is in the Q phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.16 wt% to 0.5 wt% Mg is in the Q phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.16 wt% to 0.4 wt% Mg is in the Q phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.16 wt% to 0.3 wt% Mg is in the Q phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.16 wt% to 0.2 wt% Mg is in the Q phase based on the total weight of the 6xxx aluminum alloy.

In some embodiments, 0.2 wt% to 0.7 wt% Mg is in the Q phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.3 wt% to 0.6 wt% Mg is in the Q phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.4 wt% to 0.5 wt% Mg is in the Q phase based on the total weight of the 6xxx aluminum alloy.

In some embodiments, 0.14 wt% to 0.68 wt% Si is in the Q phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.2 wt% to 0.68 wt% Si is in the Q phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.3 wt% to 0.68 wt% Si is in the Q phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.4 wt% to 0.68 wt% Si is in the Q phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.5 wt% to 0.68 wt% Si is in the Q phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.6 wt% to 0.68 wt% Si is in the Q phase based on the total weight of the 6xxx aluminum alloy.

In some embodiments, 0.2 wt% to 0.6 wt% Si is in the Q phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.3 wt% to 0.5 wt% Si is in the Q phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.4 wt% Si is in the Q phase based on the total weight of the 6xxx aluminum alloy.

In some embodiments, 0.1 wt% to 0.5 wt% Cu is in the Q phase based on the total weight of the 6xxx aluminum alloy. Between 0.15 wt% and 0.5 wt% Cu is in the Q phase based on the total weight of the 6xxx aluminum alloy. Between 0.2 wt% and 0.5 wt% Cu is in the Q phase based on the total weight of the 6xxx aluminum alloy. Between 0.25 wt% and 0.5 wt% Cu is in the Q phase based on the total weight of the 6xxx aluminum alloy. Between 0.3 wt% and 0.5 wt% Cu is in the Q phase based on the total weight of the 6xxx aluminum alloy. Between 0.35 wt% and 0.5 wt% Cu is in the Q phase based on the total weight of the 6xxx aluminum alloy. Between 0.4 wt% and 0.5 wt% Cu is in the Q phase based on the total weight of the 6xxx aluminum alloy. Between 0.45 wt% and 0.5 wt% Cu is in the Q phase based on the total weight of the 6xxx aluminum alloy.

In some embodiments, 0.1 wt% to 0.45 wt% Cu is in the Q phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.1 wt% to 0.4 wt% Cu is in the Q phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.1 wt% to 0.35 wt% Cu is in the Q phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.1 wt% to 0.3 wt% Cu is in the Q phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.1 wt% to 0.25 wt% Cu is in the Q phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.1 wt% to 0.2 wt% Cu is in the Q phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.1 wt% to 0.15 wt% Cu is in the Q phase based on the total weight of the 6xxx aluminum alloy.

In some embodiments, 0.15 wt% to 0.45 wt% Cu is in the Q phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.2 wt% to 0.4 wt% Cu is in the Q phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.3 wt% to 0.35 wt% Cu is in the Q phase based on the total weight of the 6xxx aluminum alloy.

Some embodiments of the 6xxx aluminum alloys described herein include an _Al2Cu phase. In some embodiments, 0.11 wt% to 0.54 wt% Cu is in the Al ₂ Cu phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.15 wt% to 0.54 wt% Cu is in the Al ₂ Cu phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.2 wt% to 0.54 wt% Cu is in the Al ₂ Cu phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.25 wt% to 0.54 wt% Cu is in the Al ₂ Cu phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.3 wt% to 0.54 wt% Cu is in the Al ₂ Cu phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.35 wt% to 0.54 wt% Cu is in the Al ₂ Cu phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.4 wt% to 0.54 wt% Cu is in the Al ₂ Cu phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.45 wt% to 0.54 wt% Cu is in the Al ₂ Cu phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.5 wt% to 0.54 wt% Cu is in the Al ₂ Cu phase based on the total weight of the 6xxx aluminum alloy.

In some embodiments, 0.11 wt% to 0.5 wt% Cu is in the Al ₂ Cu phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.11 wt% to 0.45 wt% Cu is in the Al ₂ Cu phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.11 wt% to 0.4 wt% Cu is in the Al ₂ Cu phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.11 wt% to 0.35 wt% Cu is in the Al ₂ Cu phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.11 wt% to 0.3 wt% Cu is in the Al ₂ Cu phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.11 wt% to 0.25 wt% Cu is in the Al ₂ Cu phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.11 wt% to 0.2 wt% Cu is in the Al ₂ Cu phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.11 wt% to 0.15 wt% Cu is in the Al ₂ Cu phase based on the total weight of the 6xxx aluminum alloy.

In some embodiments, 0.15 wt% to 0.5 wt% Cu is in the Al ₂ Cu phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.25 wt% to 0.45 wt% Cu is in the Al ₂ Cu phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.3 wt% to 0.4 wt% Cu is in the Al ₂ Cu phase based on the total weight of the 6xxx aluminum alloy. In some embodiments, 0.35 wt% Cu is in the _Al2Cu phase based on the total weight of the 6xxx aluminum alloy.

In some embodiments, the 6xxx aluminum alloys described herein have a yield strength of at least 350 MPa. In some embodiments, the 6xxx aluminum alloys described herein have a yield strength of at least 360 MPa. In some embodiments, the 6xxx aluminum alloys described herein have a yield strength of at least 370 MPa. In some embodiments, the 6xxx aluminum alloys described herein have a yield strength of at least 380 MPa. In some embodiments, the 6xxx aluminum alloys described herein have a yield strength of at least 390 MPa. In some embodiments, the 6xxx aluminum alloys described herein have a yield strength of at least 400 MPa. In some embodiments, the 6xxx aluminum alloys described herein have a yield strength of at least 410 MPa. In some embodiments, the 6xxx aluminum alloys described herein have a yield strength of at least 420 MPa. In some embodiments, the 6xxx aluminum alloys described herein have a yield strength of at least 430 MPa. In some embodiments, the 6xxx aluminum alloys described herein have a yield strength of at least 440 MPa. In some embodiments, the 6xxx aluminum alloys described herein have a yield strength of at least 450 MPa.

In some embodiments, the 6xxx aluminum alloys described herein have a yield strength of 350 MPa to 450 MPa. In some embodiments, the 6xxx aluminum alloys described herein have a yield strength of 375 MPa to 450 MPa. In some embodiments, the 6xxx aluminum alloys described herein have a yield strength of 400 MPa to 450 MPa. In some embodiments, the 6xxx aluminum alloys described herein have a yield strength of 425 MPa to 450 MPa.

In some embodiments, the 6xxx aluminum alloys described herein have a yield strength of 350 MPa to 425 MPa. In some embodiments, the 6xxx aluminum alloys described herein have yield strengths between 350 MPa and 400 MPa. In some embodiments, the 6xxx aluminum alloys described herein have a yield strength of 350 MPa to 375 MPa.

In some embodiments, the 6xxx aluminum alloys described herein have a yield strength of 375 MPa to 425 MPa.

In some embodiments, the 6xxx aluminum alloys described herein have yield strengths between 350 MPa and 400 MPa. In some embodiments, the 6xxx aluminum alloys described herein have a yield strength of 360 MPa to 400 MPa. In some embodiments, the 6xxx aluminum alloys described herein have a yield strength of 370 MPa to 400 MPa. In some embodiments, the 6xxx aluminum alloys described herein have a yield strength of 380 MPa to 400 MPa. In some embodiments, the 6xxx aluminum alloys described herein have yield strengths between 390 MPa and 400 MPa.

In some embodiments, the 6xxx aluminum alloys described herein have a yield strength of 350 MPa to 390 MPa. In some embodiments, the 6xxx aluminum alloys described herein have a yield strength of 350 MPa to 380 MPa. In some embodiments, the 6xxx aluminum alloys described herein have a yield strength of 350 MPa to 370 MPa. In some embodiments, the 6xxx aluminum alloys described herein have a yield strength of 350 MPa to 360 MPa.

In some embodiments, the 6xxx aluminum alloys described herein have a yield strength of 350 MPa to 380 MPa. In some embodiments, the 6xxx aluminum alloys described herein have a yield strength of 360 MPa to 370 MPa.

In some embodiments, the 6xxx aluminum alloy has an ultimate tensile strength (UTS) of at least 380 MPa. In some embodiments, the 6xxx aluminum alloy has an ultimate tensile strength (UTS) of at least 390 MPa. In some embodiments, the 6xxx aluminum alloy has an ultimate tensile strength (UTS) of at least 400 MPa. In some embodiments, the 6xxx aluminum alloy has an ultimate tensile strength (UTS) of at least 410 MPa. In some embodiments, the 6xxx aluminum alloy has an ultimate tensile strength (UTS) of at least 420 MPa. In some embodiments, the 6xxx aluminum alloy has an ultimate tensile strength (UTS) of at least 430 MPa. In some embodiments, the 6xxx aluminum alloy has an ultimate tensile strength (UTS) of at least 440 MPa. In some embodiments, the 6xxx aluminum alloy has an ultimate tensile strength (UTS) of at least 450 MPa. In some embodiments, the 6xxx aluminum alloy has an ultimate tensile strength (UTS) of at least 460 MPa. In some embodiments, the 6xxx aluminum alloy has an ultimate tensile strength (UTS) of at least 470 MPa. In some embodiments, the 6xxx aluminum alloy has an ultimate tensile strength (UTS) of at least 480 MPa.

In some embodiments, the 6xxx aluminum alloy has an ultimate tensile strength (UTS) of 380 MPa to 480 MPa. In some embodiments, the 6xxx aluminum alloy has an ultimate tensile strength (UTS) of 390 MPa to 480 MPa. In some embodiments, the 6xxx aluminum alloy has an ultimate tensile strength (UTS) between 400 MPa and 480 MPa. In some embodiments, the 6xxx aluminum alloy has an ultimate tensile strength (UTS) of 410 MPa to 480 MPa. In some embodiments, the 6xxx aluminum alloy has an ultimate tensile strength (UTS) of 420-480 MPa. In some embodiments, the 6xxx aluminum alloy has an ultimate tensile strength (UTS) between 430 MPa and 480 MPa. In some embodiments, the 6xxx aluminum alloy has an ultimate tensile strength (UTS) of 440-480 MPa. In some embodiments, the 6xxx aluminum alloy has an ultimate tensile strength (UTS) of 450 MPa to 480 MPa. In some embodiments, the 6xxx aluminum alloy has an ultimate tensile strength (UTS) of 460-480 MPa. In some embodiments, the 6xxx aluminum alloy has an ultimate tensile strength (UTS) of 470-480 MPa.

In some embodiments, the 6xxx aluminum alloy has an ultimate tensile strength (UTS) of 380 MPa to 470 MPa. In some embodiments, the 6xxx aluminum alloy has an ultimate tensile strength (UTS) of 380 MPa to 460 MPa. In some embodiments, the 6xxx aluminum alloy has an ultimate tensile strength (UTS) of 380 MPa to 450 MPa. In some embodiments, the 6xxx aluminum alloy has an ultimate tensile strength (UTS) of 380 MPa to 440 MPa. In some embodiments, the 6xxx aluminum alloy has an ultimate tensile strength (UTS) of 380 MPa to 430 MPa. In some embodiments, the 6xxx aluminum alloy has an ultimate tensile strength (UTS) of 380 MPa to 420 MPa. In some embodiments, the 6xxx aluminum alloy has an ultimate tensile strength (UTS) between 380 MPa and 410 MPa. In some embodiments, the 6xxx aluminum alloy has an ultimate tensile strength (UTS) between 380 MPa and 400 MPa. In some embodiments, the 6xxx aluminum alloy has an ultimate tensile strength (UTS) of 380-390 MPa.

In some embodiments, the 6xxx aluminum alloy has an ultimate tensile strength (UTS) of 390 MPa to 470 MPa. In some embodiments, the 6xxx aluminum alloy has an ultimate tensile strength (UTS) of 400 MPa to 460 MPa. In some embodiments, the 6xxx aluminum alloy has an ultimate tensile strength (UTS) of 410 MPa to 450 MPa. In some embodiments, the 6xxx aluminum alloy has an ultimate tensile strength (UTS) of 420-440 MPa.

Some embodiments of the present disclosure relate to methods of making 6xxx aluminum alloys. In some embodiments, the method comprises the steps of casting a 6xxx aluminum alloy described herein, homogenizing the 6xxx aluminum alloy, extruding the 6xxx aluminum alloy; and aging the 6xxx aluminum alloy. may contain.

In some non-limiting exemplary embodiments, the method may be performed in the following sequence: (a) casting a 6xxx aluminum alloy; (b) homogenizing the 6xxx aluminum alloy; c) extruding the 6xxx aluminum alloy; and (d) aging the 6xxx aluminum alloy.

In some embodiments, the homogenizing step includes heating the 6xxx aluminum alloy to a homogenization temperature (T _H ) that is lower than the solidus temperature (T _S ) of the 6xxx aluminum alloy. In some embodiments, homogenization converts the 6xxx aluminum alloy into the _Mg2Si phase described herein, the Q phase described herein, the _Al2Cu phase described herein, or a combination thereof to a T _H greater than the solvus temperature (T _Σ ) of at least one of them.

In some embodiments, T _Σ (Mg ₂ Si)<T _H <T _S and by heating a 6xxx aluminum alloy to T _H the Mg ₂ Si phase forms a solid solution. In some embodiments, T _Σ (Q)<T _H <T _S and by heating a 6xxx aluminum alloy to T _H the Q phase forms a solid solution. In some embodiments, T _Σ (Al ₂ Cu)<T _H <T _S and by heating a 6xxx aluminum alloy to T _H the Al ₂ Cu phase forms a solid solution.

In some embodiments, T _Σ (Mg ₂ Si) and T _Σ (Q)<T _H <T _S and by heating the 6xxx aluminum alloy to T _H , the Mg ₂ Si and Q phases form a solid solution. to form In some embodiments, T _Σ (Mg ₂ Si) and T _Σ (Al ₂ Cu)<T _H <T _S and heating the 6xxx aluminum alloy to T _H produces the Mg ₂ Si phase and the Al ₂ The Cu phase forms a solid solution. In some embodiments, T _Σ (Q) and T _Σ (Al ₂ Cu)<T _H <T _S and heating the 6xxx aluminum alloy to T _H causes the Q and Al ₂ Cu phases to form a solid solution. to form

In some embodiments, T _Σ (Mg ₂ Si), T _Σ (Q), and T _Σ (Al ₂ Cu)<T _H <T _S and by heating the 6xxx aluminum alloy to T _H The _Mg2Si , Q and _Al2Cu phases form a solid solution. In some embodiments, the solid solution has a face centered cubic (fcc) crystal structure.

In some embodiments, the T _Σ of at least one of the Mg ₂ Si phase, Q phase, Al ₂ Cu phase, or any combination thereof is in the range of 520°C to 590°C. In some embodiments, the T _Σ of at least one of the Mg ₂ Si phase, Q phase, Al ₂ Cu phase, or any combination thereof is in the range of 530°C to 590°C. In some embodiments, the T _Σ of at least one of the Mg ₂ Si phase, Q phase, Al ₂ Cu phase, or any combination thereof is in the range of 540°C to 590°C. In some embodiments, the T _Σ of at least one of the Mg ₂ Si phase, Q phase, Al ₂ Cu phase, or any combination thereof is in the range of 550°C to 590°C. In some embodiments, the T _Σ of at least one of the Mg ₂ Si phase, Q phase, Al ₂ Cu phase, or any combination thereof is in the range of 560°C to 590°C. In some embodiments, the T _Σ of at least one of the Mg ₂ Si phase, Q phase, Al ₂ Cu phase, or any combination thereof is in the range of 570°C to 590°C. In some embodiments, the T _Σ of at least one of the Mg ₂ Si phase, Q phase, Al ₂ Cu phase, or any combination thereof is in the range of 580°C to 590°C.

In some embodiments, the T _Σ of at least one of the Mg ₂ Si phase, Q phase, Al ₂ Cu phase, or any combination thereof is in the range of 520°C to 580°C. In some embodiments, the T _Σ of at least one of the Mg ₂ Si phase, Q phase, Al ₂ Cu phase, or any combination thereof is in the range of 520°C to 570°C. In some embodiments, the T _Σ of at least one of the Mg ₂ Si phase, Q phase, Al ₂ Cu phase, or any combination thereof is in the range of 520°C to 560°C. In some embodiments, the T _Σ of at least one of the Mg ₂ Si phase, Q phase, Al ₂ Cu phase, or any combination thereof is in the range of 520°C to 550°C. In some embodiments, the T _Σ of at least one of the Mg ₂ Si phase, Q phase, Al ₂ Cu phase, or any combination thereof is in the range of 520°C to 540°C. In some embodiments, the T _Σ of at least one of the Mg ₂ Si phase, Q phase, Al ₂ Cu phase, or any combination thereof is in the range of 520°C to 530°C.

In some embodiments, the T _Σ of at least one of the Mg ₂ Si phase, Q phase, Al ₂ Cu phase, or any combination thereof is in the range of 520°C to 570°C. In some embodiments, the T _Σ of at least one of the Mg ₂ Si phase, Q phase, Al ₂ Cu phase, or any combination thereof is in the range of 530°C to 560°C. In some embodiments, the T _Σ of at least one of the Mg ₂ Si phase, Q phase, Al ₂ Cu phase, or any combination thereof is in the range of 540°C to 550°C.

In some embodiments, the T _s of the 6xxx aluminum alloy is in the range of 540°C to 610°C. In some embodiments, the T _s of the 6xxx aluminum alloy is in the range of 550°C to 610°C. In some embodiments, the T _s of the 6xxx aluminum alloy is in the range of 560°C to 610°C. In some embodiments, the T _s of the 6xxx aluminum alloy is in the range of 570°C to 610°C. In some embodiments, the T _s of the 6xxx aluminum alloy is in the range of 580°C to 610°C. In some embodiments, the T _s of the 6xxx aluminum alloy is in the range of 590°C to 610°C. In some embodiments, the T _s of the 6xxx aluminum alloy is in the range of 600°C to 610°C.

In some embodiments, the T _s of the 6xxx aluminum alloy is in the range of 540°C to 600°C. In some embodiments, the T _s of the 6xxx aluminum alloy is in the range of 540°C to 590°C. In some embodiments, the T _s of the 6xxx aluminum alloy is in the range of 540°C to 580°C. In some embodiments, the T _s of the 6xxx aluminum alloy is in the range of 540°C to 570°C. In some embodiments, the T _s of the 6xxx aluminum alloy is in the range of 540°C to 560°C. In some embodiments, the T _s of the 6xxx aluminum alloy is in the range of 540°C to 550°C.

In some embodiments, the T _s of the 6xxx aluminum alloy is in the range of 550°C to 600°C. In some embodiments, the T _s of the 6xxx aluminum alloy is in the range of 560°C to 590°C. In some embodiments, the T _s of the 6xxx aluminum alloy is in the range of 570°C to 580°C.

In some embodiments, T _H ranges from 530°C to 600°C. In some embodiments, T _H ranges from 540°C to 600°C. In some embodiments, T _H ranges from 550°C to 600°C. In some embodiments, T _H ranges from 560°C to 600°C. In some embodiments, T _H ranges from 570°C to 600°C. In some embodiments, T _H ranges from 580°C to 600°C. In some embodiments, T _H ranges from 590°C to 600°C.

In some embodiments, T _H ranges from 530°C to 590°C. In some embodiments, T _H ranges from 530°C to 580°C. In some embodiments, T _H ranges from 530°C to 570°C. In some embodiments, T _H ranges from 530°C to 560°C. In some embodiments, T _H ranges from 530°C to 550°C. In some embodiments, T _H ranges from 530°C to 540°C.

In some embodiments, T _H ranges from 540°C to 590°C. In some embodiments, T _H ranges from 550°C to 580°C. In some embodiments, T _H ranges from 560°C to 570°C.

In some embodiments, homogenizing comprises heating the 6xxx aluminum alloy from room temperature (as defined herein) to T _H for 1-10 hours. In some embodiments, homogenizing comprises heating the 6xxx aluminum alloy from room temperature (as defined herein) to T _H for 2-10 hours. In some embodiments, homogenizing comprises heating the 6xxx aluminum alloy from room temperature (as defined herein) to T _H for 3-10 hours. In some embodiments, homogenizing comprises heating the 6xxx aluminum alloy from room temperature (as defined herein) to T _H for 4-10 hours. In some embodiments, homogenizing comprises heating the 6xxx aluminum alloy from room temperature (as defined herein) to T _H for 5-10 hours. In some embodiments, homogenizing comprises heating the 6xxx aluminum alloy from room temperature (as defined herein) to T _H for 6-10 hours. In some embodiments, homogenizing comprises heating the 6xxx aluminum alloy from room temperature (as defined herein) to T _H for 7-10 hours. In some embodiments, homogenizing comprises heating the 6xxx aluminum alloy from room temperature (as defined herein) to T _H for 8-10 hours. In some embodiments, homogenizing comprises heating the 6xxx aluminum alloy from room temperature (as defined herein) to T _H for 9-10 hours.

In some embodiments, homogenizing comprises heating the 6xxx aluminum alloy from room temperature (as defined herein) to T _H for 1-9 hours. In some embodiments, homogenizing comprises heating the 6xxx aluminum alloy from room temperature (as defined herein) to T _H for 1-8 hours. In some embodiments, homogenizing comprises heating the 6xxx aluminum alloy from room temperature (as defined herein) to T _H for 1-7 hours. In some embodiments, homogenizing comprises heating the 6xxx aluminum alloy from room temperature (as defined herein) to T _H for 1-6 hours.

In some embodiments, homogenizing comprises heating the 6xxx aluminum alloy from room temperature (as defined herein) to T _H for 1-5 hours. In some embodiments, homogenizing comprises heating the 6xxx aluminum alloy from room temperature to T _H for 2-5 hours. In some embodiments, homogenizing comprises heating the 6xxx aluminum alloy from room temperature to T _H for 3-5 hours. In some embodiments, homogenizing comprises heating the 6xxx aluminum alloy from room temperature to T _H for 4-5 hours.

In some embodiments, homogenizing comprises heating the 6xxx aluminum alloy from room temperature to T _H for 1-4 hours. In some embodiments, homogenizing comprises heating the 6xxx aluminum alloy from room temperature to T _H for 1-3 hours. In some embodiments, homogenizing comprises heating the 6xxx aluminum alloy from room temperature to T _H for 1-2 hours.

In some embodiments, homogenizing comprises heating the 6xxx aluminum alloy from room temperature to T _H for 2-4 hours. In some embodiments, homogenizing comprises heating the 6xxx aluminum alloy from room temperature to T _H for 3 hours.

In some embodiments, homogenizing comprises soaking the 6xxx aluminum alloy in air for 2-12 hours. In some embodiments, homogenizing comprises soaking the 6xxx aluminum alloy in air for 2-10 hours. In some embodiments, homogenizing comprises soaking the 6xxx aluminum alloy in air for 2-8 hours. In some embodiments, homogenizing comprises soaking the 6xxx aluminum alloy in air for 2-6 hours. In some embodiments, homogenizing comprises soaking the 6xxx aluminum alloy in air for 2-4 hours.

In some embodiments, homogenizing comprises soaking the 6xxx aluminum alloy in air for 4-12 hours. In some embodiments, homogenizing comprises soaking the 6xxx aluminum alloy in air for 6-12 hours. In some embodiments, homogenizing comprises soaking the 6xxx aluminum alloy in air for 8-12 hours. In some embodiments, homogenizing comprises soaking the 6xxx aluminum alloy in air for 10-12 hours.

In some embodiments, homogenizing comprises soaking the 6xxx aluminum alloy in air for 4-10 hours. In some embodiments, homogenizing comprises soaking the 6xxx aluminum alloy in air for 6-8 hours.

In some embodiments, homogenizing further comprises air cooling the 6xxx aluminum alloy to room temperature (as defined herein).

In some embodiments, the step of extruding is performed at an exit temperature T _E and T _E is controlled in the range of 450°C to 570°C. In some embodiments, T _E is controlled in the range of 470°C to 570°C. In some embodiments, T _E is controlled in the range of 490°C to 570°C. In some embodiments, T _E is controlled in the range of 510°C to 570°C. In some embodiments, T _E is controlled in the range of 530°C to 570°C. In some embodiments, T _E is controlled in the range of 550°C to 570°C.

In some embodiments, T _E is controlled in the range of 450°C to 550°C. In some embodiments, T _E is controlled in the range of 450°C to 530°C. In some embodiments, T _E is controlled in the range of 450°C to 510°C. In some embodiments, T _E is controlled in the range of 450°C to 490°C. In some embodiments, T _E is controlled in the range of 450°C to 470°C.

In some embodiments, T _E is controlled in the range of 470°C to 550°C. In some embodiments, T _E is controlled in the range of 490°C to 530°C. In some embodiments, _TE is controlled at 510°C.

In some embodiments, aging is performed for 1 hour to 128 hours. In some embodiments, aging is performed for 32 hours to 128 hours. In some embodiments, aging is performed for 64 hours to 128 hours. In some embodiments, aging is performed for 96 hours to 128 hours.

In some embodiments, aging is performed for 1 hour to 96 hours. In some embodiments, aging is performed for 1 hour to 64 hours. In some embodiments, aging is performed for 1 hour to 32 hours.

In some embodiments, aging is performed for 32 hours to 96 hours.

In some embodiments, aging is performed for 5 hours to 35 hours. In some embodiments, aging is performed for 10 hours to 35 hours. In some embodiments, aging is performed for 15 hours to 35 hours. In some embodiments, aging is performed for 20 hours to 35 hours. In some embodiments, aging is performed for 25 hours to 35 hours. In some embodiments, aging is performed for 30 to 35 hours.

In some embodiments, aging is performed for 5 hours to 30 hours. In some embodiments, aging is performed for 5 hours to 25 hours. In some embodiments, aging is performed for 5 hours to 20 hours. In some embodiments, aging is performed for 5 hours to 15 hours. In some embodiments, aging is performed for 5 to 10 hours.

In some embodiments, aging is performed for 10 hours to 35 hours. In some embodiments, aging is performed for 15 hours to 30 hours. In some embodiments, aging is performed for 20 to 25 hours.

In some embodiments, the aging step comprises natural aging (as defined herein), artificial aging (as defined herein), or any combination thereof.

In some embodiments, natural aging is performed for 1 hour to 96 hours. In some embodiments, natural aging is performed for 10 hours to 96 hours. In some embodiments, natural aging is performed for 20 hours to 96 hours. In some embodiments, natural aging is performed for 30 hours to 96 hours. In some embodiments, natural aging is performed for 40 hours to 96 hours. In some embodiments, natural aging is performed for 50 hours to 96 hours. In some embodiments, natural aging is performed for 60 hours to 96 hours. In some embodiments, natural aging is performed for 70 hours to 96 hours. In some embodiments, natural aging is performed for 80 hours to 96 hours. In some embodiments, natural aging is performed for 90 hours to 96 hours.

In some embodiments, natural aging is performed for 1 hour to 90 hours. In some embodiments, natural aging is performed for 1 hour to 80 hours. In some embodiments, natural aging is performed for 1 hour to 70 hours. In some embodiments, natural aging is performed for 1 hour to 60 hours. In some embodiments, natural aging is performed for 1 hour to 50 hours. In some embodiments, natural aging is performed for 1 hour to 40 hours. In some embodiments, natural aging is performed for 1 hour to 30 hours. In some embodiments, natural aging is performed for 1 hour to 20 hours. In some embodiments, natural aging is performed for 1 hour to 10 hours.

In some embodiments, natural aging is performed for 10 hours to 90 hours. In some embodiments, natural aging is performed for 20 hours to 80 hours. In some embodiments, natural aging is performed for 30 hours to 70 hours. In some embodiments, natural aging is performed for 40 hours to 60 hours. In some embodiments, natural aging is performed for 50 hours.

In some embodiments, artificial aging is performed for 1 hour to 32 hours. In some embodiments, artificial aging is performed for 5 hours to 32 hours. In some embodiments, artificial aging is performed for 10 hours to 32 hours. In some embodiments, artificial aging is performed for 15 hours to 32 hours. In some embodiments, artificial aging is performed for 20 hours to 32 hours. In some embodiments, artificial aging is performed for 25 hours to 32 hours. In some embodiments, artificial aging is performed for 30 hours to 32 hours.

In some embodiments, artificial aging is performed for 1 hour to 30 hours. In some embodiments, artificial aging is performed for 1 hour to 25 hours. In some embodiments, artificial aging is performed for 1 hour to 20 hours. In some embodiments, artificial aging is performed for 1 hour to 15 hours. In some embodiments, artificial aging is performed for 1 hour to 10 hours. In some embodiments, artificial aging is performed for 1 hour to 5 hours.

In some embodiments, artificial aging is performed for 5-30 hours. In some embodiments, artificial aging is performed for 10 hours to 25 hours. In some embodiments, artificial aging is performed for 15-20 hours.

In some embodiments, artificial aging is performed at an artificial aging temperature (T _AA ) of 150°C to 210°C. In some embodiments, the _TAA is 160°C to 210°C. In some embodiments, the _TAA is between 170°C and 210°C. In some embodiments, the _TAA is between 180°C and 210°C. In some embodiments, the _TAA is 190°C to 210°C. In some embodiments, the _TAA is 200°C to 210°C.

In some embodiments, the _TAA is 150°C to 200°C. In some embodiments, the _TAA is between 150°C and 190°C. In some embodiments, the _TAA is 150°C to 180°C. In some embodiments, the _TAA is 150°C to 170°C. In some embodiments, the _TAA is 150°C to 160°C.

In some embodiments, the _TAA is between 160°C and 200°C. In some embodiments, the _TAA is 170°C to 190°C. In some embodiments, the _TAA is 180°C.

In some embodiments, the methods of making 6xxx aluminum alloys described herein may include a quenching step. In some embodiments, the quench is water cooled.

In some embodiments where the method is performed in a particular order, the quenching step may occur between the homogenizing and extruding steps. One non-limiting embodiment of the method for producing a 6xxx aluminum alloy described herein, including the step of quenching, is as follows. (a) casting the 6xxx aluminum alloy, (b) homogenizing the 6xxx aluminum alloy, (c) quenching the 6xxx aluminum alloy, (d) extruding the 6xxx aluminum alloy, and (d) 6xxx aluminum. Aging the alloy.

The following examples of this disclosure are illustrative only and not intended to be limiting.

Example 1 - Laboratory scale test

Laboratory scale testing was performed on five different alloys, including four comparative 6xxx aluminum alloy compositions and one exemplary 6xxx aluminum alloy composition according to the present disclosure. Table 1 shows the composition of each alloy.

<Table 1. Alloy composition, weight %>

Two bookmold casting ingots measuring 2.75 inches (thickness) by 4.35 inches by 4.75 inches were cast for each alloy composition. The ingot was then ground to a thickness of 2 inches to remove coarse pores on both surfaces. The ground ingots were homogenized under non-limiting conditions of 460°C for 5 hours + 504°C for 24 hours + 552°C for 24 hours.

The homogenized ingot was hot rolled to 0.2 inch thickness at an exit temperature of 315°C. The hot-rolled sheet was subjected to a solution heat treatment at 552° C. for 2 hours and then quenched with water at room temperature. The rolled sheet was subjected to artificial aging after natural aging for 24 hours. The mechanical properties in the long transverse direction were measured and the results are shown in Table 2.

<Table 2. Mechanical Properties>

As a simplified version of Table 2, Table 3 shows the specific properties measured for each alloy composition.

<Table 3. Specific Properties Measured for Each Alloy Composition>

Example 2 - Factory scale test

For Alloy 1 shown in Table 1, two billets each 8 inches in diameter and 120 inches long were cast. Two other billets of the same size (namely Alloy 2 and Alloy 3) were also cast. The compositions of Alloy 2 and Alloy 3 are shown in Table 4.

<Table 4. Composition of additional alloys, weight %>

The billet was homogenized under the following conditions. Slow heating billet from room temperature to 571.1°C (73.9°C maximum rate per hour). Soak at 571.1°C for 6 hours. High speed forced air cooling - 282.2°C per hour target.

The billet was extruded to a predetermined profile with the outlet temperature controlled between 557°C and 553°C. FIG. 1 shows the dimensions of an exemplary extruded profile. The extruded profile was also water cooled at a quench rate of 77°C/sec.

Extruded profiles of Alloy 2 and Alloy 3 were naturally aged at room temperature for various times (0-96 hours). The extruded profiles of Alloy 2 and Alloy 3 were also artificially aged at 180° C. for 10 hours. Tensile bars were cut from the top and bottom locations of each extruded profile, as shown in FIG.

The mechanical properties of Alloy 2 and Alloy 3 artificially aged at 180° C. for 10 hours are shown in Tables 5 and 6, respectively.

<Table 5. Mechanical properties of alloy 2 artificially aged at 180°C for 10 hours>

<Table 6. Mechanical properties of alloy 3 artificially aged at 180°C for 10 hours>

All samples were solution heat treated at 575°C for 1 hour. All specimens were water cooled at room temperature. All specimens were artificially aged at 170°C or 180°C after 24 hours of natural aging.

Alloy 2 aged at 170° C. for 32 hours achieved a tensile strength of 402 MPa, a yield strength of 385 MPa and an elongation of 11.4%. Aging data was generated for both Alloy 2 and Alloy 3. The results are shown in Tables 7 and 8.

<Table 7. Mechanical properties of Alloy 2 aged at 170°C and 180°C for various times>

<Table 8. Mechanical properties of alloy 3 aged at 170°C and 180°C for various times>

[Example 3]

Two billets, each 8 inches in diameter and 120 inches long, were cast for Alloy 4, a non-limiting example of a 6xxx aluminum alloy according to the present disclosure. The composition of a non-limiting exemplary Alloy 4 is shown in Table 9.

<Table 9. Composition of alloy 4, wt%>

A billet of Alloy 4 was homogenized in the following manner. Slow heating billet from room temperature to 571.1°C (73.9°C maximum per hour). Soak at 571.1°C for 6 hours. High speed (target of 282.2°C per hour) forced air cooling

Both factory extrusion tests (Example 3a) and laboratory scale tests (Example 3b) were performed on Alloy 4.

<Example 3a. Factory Extrusion Test of Exemplary Alloy 4>

Billets of Alloy 4 were extruded to a predetermined profile with the exit temperature controlled between 557°C and 553°C. The extruded profile was water cooled at a quench rate of 77°C/sec.

The extruded profile of Alloy 4 was naturally aged at room temperature for 24 hours, then artificially aged at three different aging conditions: 171° C. for 10 hours, 185° C. for 6 hours, and 190° C. for 4 hours. Table 10 shows the mechanical properties of Alloy 4 after artificial aging.

<Table 10. Mechanical properties of Alloy 4 under different aging conditions>

Example 3b Lab Scale Extrusion of Exemplary Alloy 4

A 1.5 inch diameter by 2 inch long billet was machined from the 8 inch diameter billet of Example 3a. These 1.5 inch diameter billets were then extruded in a small lab scale extruder. Extrusion conditions are shown in Table 11. The extruded profile was also water cooled at a quench rate of 100°C/sec.

<Table 11. Extrusion conditions on a laboratory scale>

The extrusion profile of Alloy 4 was natural aged at room temperature for 24 hours followed by artificial aging at 175° C. for different times (shown in Table 12 below). The mechanical property results are shown in Tables 12 and 13. Table 13 summarizes the results for the mechanical properties of billets C, D and E after aging at 175°C for 16 hours.

<Table 12. Mechanical Properties of Alloy 4 Aged at 175°C for Different Aging Times>

<Table 13. Mechanical properties of Alloy 4 aged at 175°C for different aging times>

For at least some non-limiting aspects of the present disclosure, El, E2, E3, E4 . . . , etc. will be described with reference to the embodiments numbered.
<El>
6xxx aluminum alloy,
0.70% to 1.1% by weight silicon (Si) based on the total weight of the 6xxx aluminum alloy;
0.75% to 1.15% by weight magnesium (Mg) based on the total weight of the 6xxx aluminum alloy;
provided that the weight ratio of Mg and Si in the 6xxx aluminum alloy is 0.68:1.0 to 1.65:1.0, and the sum of Si and Mg is 1 based on the total weight of the 6xxx aluminum alloy present in an amount of .5% to 2.2%,
0.30 wt% to 0.8 wt% copper (Cu) based on the total weight of the 6xxx aluminum alloy;
0.12% to 0.3% by weight iron (Fe) based on the total weight of the 6xxx aluminum alloy;
0.25% to 0.65% by weight manganese (Mn) based on the total weight of the 6xxx aluminum alloy;
Zirconium (Zr) up to 0.2% by weight based on the total weight of the 6xxx aluminum alloy;
Chromium (Cr) up to 0.2% by weight based on the total weight of the 6xxx aluminum alloy;
The balance consists of aluminum (Al) and other elements,
each of said other elements is present in an amount of 0.05% or less by weight based on the total weight of said 6xxx aluminum alloy;
A 6xxx aluminum alloy wherein the sum of said other elements is less than 0.15 weight percent based on the total weight of said 6xxx aluminum alloy.
<E2>
6xxx aluminum of embodiment 1, wherein said other elements are selected from the group consisting of titanium (Ti), boron (B), zinc (Zn), molybdenum (Mo), nickel (Ni), and any combination thereof. alloy.
<E3>
3. The 6xxx aluminum alloy of embodiment 1 or 2, wherein up to 0.95 wt% Mg is in the _Mg2Si phase, based on the total weight of said 6xxx aluminum alloy.
<E4>
The 6xxx aluminum alloy of embodiments 1-3, wherein up to 0.5 wt% Si is in the Mg ₂ Si phase, based on the total weight of said 6xxx aluminum alloy.
<E5>
The 6xxx aluminum of any of _the preceding _embodiments , wherein from 0.16 wt% to 0.78 wt% Mg is in the _Al5Cu2Mg8Si5 ("Q") phase, based on the total weight of the 6xxx aluminum alloy _. alloy.
<E6>
The 6xxx aluminum alloy of any of the preceding embodiments, wherein from 0.14 wt% to 0.68 wt% Si is in the Q phase, based on the total weight of the 6xxx aluminum alloy.
<E7>
The 6xxx aluminum alloy of any of the preceding embodiments, wherein 0.1 wt% to 0.5 wt% Cu is in the Q phase, based on the total weight of the 6xxx aluminum alloy.
<E8>
The 6xxx aluminum alloy of any of the preceding embodiments, wherein from 0.11 wt% to 0.54 wt% Cu is in the Al ₂ Cu phase, based on the total weight of the 6xxx aluminum alloy.
<E9>
The 6xxx aluminum alloy of any of the preceding embodiments, having a yield strength of at least 350 MPa.
<E10>
The 6xxx aluminum alloy of any of the preceding embodiments, having a yield strength of at least 370 MPa.
<Ell>
The 6xxx aluminum alloy of any preceding embodiment 1-9, wherein the yield strength is between 350 MPa and 400 MPa.
<E12>
The 6xxx aluminum alloy of previous embodiments 1-11 having a yield strength of 370 MPa to 400 MPa.
<E13>
6xxx aluminum alloy,
0.70% to 1.1% by weight silicon (Si) based on the total weight of the 6xxx aluminum alloy;
0.75% to 1.15% by weight magnesium (Mg) based on the total weight of the 6xxx aluminum alloy;
provided that the sum of Si and Mg is present in an amount of 1.5% to 2.2% based on the total weight of the 6xxx aluminum alloy and the weight ratio of Mg to Si in the 6xxx aluminum alloy is 0.68: 1.0 to 1.65:1.0,
0.30 wt% to 0.8 wt% copper (Cu) based on the total weight of the 6xxx aluminum alloy;
0.12% to 0.3% by weight iron (Fe) based on the total weight of the 6xxx aluminum alloy;
0.25% to 0.65% by weight manganese (Mn) based on the total weight of the 6xxx aluminum alloy;
aluminum (Al);
optionally up to 0.2 wt% zirconium (Zr) based on the total weight of said 6xxx aluminum alloy;
optionally up to 0.2 wt% chromium (Cr) based on the total weight of the 6xxx aluminum alloy;
A 6xxx aluminum alloy consisting essentially of, optionally with other elements.
<E14>
14. The 6xxx aluminum alloy of embodiment 13, wherein each of said other elements, if present, is present in an amount less than 0.05 weight percent based on the total weight of said 6xxx aluminum alloy.
<E15>
15. The 6xxx aluminum alloy of embodiment 13 or 14, wherein the sum of said other elements is less than 0.15 weight percent based on the total weight of said 6xxx aluminum alloy.
<E16>
6xxx aluminum alloy,
0.70% to 1.1% by weight silicon (Si) based on the total weight of the 6xxx aluminum alloy;
0.75% to 1.15% by weight magnesium (Mg) based on the total weight of the 6xxx aluminum alloy;
provided that the weight ratio of Mg and Si in the 6xxx aluminum alloy is 0.68:1.0 to 1.65:1.0,
0.30% to 0.8% by weight copper (Cu), based on the total weight of said 6xxx aluminum alloy.
<E17>
17. The 6xxx aluminum alloy of embodiment 16, wherein the sum of Si and Mg is present in an amount of 1.5% to 2.2% based on the total weight of said 6xxx aluminum alloy.
<E18>
18. The 6xxx aluminum alloy of embodiment 16 or 17, further comprising 0.12% to 0.3% by weight iron (Fe) based on the total weight of said 6xxx aluminum alloy.
<E19>
19. The 6xxx aluminum alloy of embodiments 16-18, further comprising manganese (Mn) in an amount of 0.25% to 0.65% by weight based on the total weight of said 6xxx aluminum alloy.
<E20>
20. The 6xxx aluminum alloy of embodiments 16-19, further comprising up to 0.2 weight percent zirconium (Zr) based on the total weight of said 6xxx aluminum alloy.
<E21>
21. The 6xxx aluminum alloy of embodiments 16-20, further comprising up to 0.2 weight percent chromium (Cr) based on the total weight of said 6xxx aluminum alloy.
<E22>
22. The 6xxx aluminum alloy of embodiments 16-21, further comprising less than 0.05 weight percent of other elements, based on the total weight of the 6xxx aluminum alloy.
<E23>
23. The 6xxx aluminum alloy of embodiment 22, wherein the sum of said other elements is less than 0.15 weight percent based on the total weight of the 6xxx aluminum alloy.
<E24>
24. The 6xxx aluminum of embodiment 22 or 23, wherein said other element is selected from titanium (Ti), boron (B), zinc (Zn), molybdenum (Mo), nickel (Ni), or any combination thereof. alloy.
<E25>
a method,
casting a 6xxx aluminum alloy, said 6xxx aluminum alloy comprising 0.70 wt% to 1.1 wt% silicon (Si) based on the total weight of said 6xxx aluminum alloy; 0.75% to 1.15% by weight magnesium (Mg) based on total weight;
provided that the weight ratio of Mg and Si in the 6xxx aluminum alloy is 0.68:1.0 to 1.65:1.0 and the weight ratio is 0.30% to 0 based on the total weight of the 6xxx aluminum alloy; casting a 6xxx aluminum alloy comprising: .8 weight percent copper (Cu);
homogenizing the 6xxx aluminum alloy;
A method comprising extruding the 6xxx aluminum alloy and aging the 6xxx aluminum alloy.
<E26>
26. The method of embodiment 25, wherein said homogenizing comprises heating said 6xxx aluminum alloy to a homogenization temperature (T _H ) below a solidus temperature (T _S ) of said 6xxx aluminum alloy.
<E27>
The homogenizing may include the _Mg2Si phase of the 6xxx aluminum _alloy , the _Al5Cu2Mg8Si5 ("Q") phase of the _6xxx aluminum alloy, the Al2Cu phase _of the _6xxx aluminum alloy, or any of 27. The method of embodiment 25 or 26, comprising heating the 6xxx aluminum alloy to T _H above at least one solvus temperature (T _Σ ) in any combination.
<E28>
28. The method of embodiment 26 or 27, wherein the T _Σ of at least one of the Mg ₂ Si phase, Q phase, or any combination thereof ranges from 520°C to 590°C.
<E29>
29. The method of embodiments 26-28, wherein T _H ranges from 530°C to 600°C.
<E30>
30. The method of embodiments 26-29, wherein the 6xxx aluminum alloy has a T _s in the range of 540°C to 610°C.
<E31>
31. The method of embodiments 25-30, wherein said homogenizing comprises heating said 6xxx aluminum alloy from room temperature to T _H for 1-10 hours.
<E32>
32. The method of embodiments 25-31, wherein the homogenizing comprises soaking the 6xxx aluminum alloy in air for 1-20 hours.
<E33>
33. The method of embodiments 25-32, wherein the homogenizing further comprises air cooling the 6xxx aluminum alloy to room temperature.
<E34>
34. The method of embodiments 25-33, wherein said extruding is performed at an exit temperature T _E and said T _E is controlled in the range of 450°C to 570°C.
<E35>
35. The method of embodiments 25-34, further comprising quenching the 6xxx aluminum alloy.
<E36>
36. The method of embodiment 35, wherein said quenching is water cooling.
<E37>
37. The method of embodiment 35 or 36, wherein said quenching is performed between homogenizing and extruding.
<E38>
38. The method of embodiments 25-37, wherein said aging comprises natural aging, and wherein said natural aging is performed for 1 to 96 hours.
<E39>
39. The method of embodiments 25-38, wherein said aging comprises artificial aging, said artificial aging is performed at an artificial aging temperature (T _AA ) of 150° C. to 210° C. for 1 to 32 hours.

Variations, modifications and alterations to the above-described embodiments of the disclosure will become apparent to those skilled in the art. All such variations, modifications, alterations, etc. are intended to come within the spirit and scope of this disclosure, which is limited only by the appended claims.

Having described several embodiments of the present disclosure, it is understood that these embodiments are illustrative and not restrictive and that many modifications may become apparent to those skilled in the art. understood. For example, all dimensions set forth herein are provided by way of example only and are intended to be illustrative and non-limiting.

Any feature or element positively identified in this specification may be expressly excluded as a feature or element of an embodiment of the invention defined in a claim.

The disclosure herein may be practiced in the absence of any element or elements or limitations not specifically disclosed herein. Thus, for example, in each instance herein, the terms "comprising," "consisting essentially of," and "consisting of" are all can be replaced by either of the other two terms without changing their respective meanings. The terms and expressions employed are used as terms of description rather than terms of limitation. No use of such terms and expressions is intended to exclude any equivalents of the features shown and described, or portions thereof, and that various modifications are possible within the scope of this disclosure. Recognized.

Claims (39)

6xxx aluminum alloy,
0.70% to 1.1% by weight silicon (Si) based on the total weight of the 6xxx aluminum alloy;
0.75% to 1.15% by weight magnesium (Mg) based on the total weight of the 6xxx aluminum alloy;
provided that the weight ratio of Mg and Si in the 6xxx aluminum alloy is 0.68:1.0 to 1.65:1.0, and the sum of Si and Mg is 1 based on the total weight of the 6xxx aluminum alloy present in an amount of .5% to 2.2%,
0.30 wt% to 0.8 wt% copper (Cu) based on the total weight of the 6xxx aluminum alloy;
0.12% to 0.3% by weight iron (Fe) based on the total weight of the 6xxx aluminum alloy;
0.25% to 0.65% by weight manganese (Mn) based on the total weight of the 6xxx aluminum alloy;
Zirconium (Zr) up to 0.2% by weight based on the total weight of the 6xxx aluminum alloy;
Chromium (Cr) up to 0.2% by weight based on the total weight of the 6xxx aluminum alloy;
The balance consists of aluminum (Al) and other elements,
each of said other elements is present in an amount of 0.05% or less by weight based on the total weight of said 6xxx aluminum alloy;
A 6xxx aluminum alloy wherein the sum of said other elements is less than 0.15 weight percent based on the total weight of said 6xxx aluminum alloy. 2. The method of claim 1, wherein said other element is selected from the group consisting of Titanium (Ti), Boron (B), Zinc (Zn), Molybdenum (Mo), Nickel (Ni) and any combination thereof. 6xxx aluminum alloy. 3. The 6xxx aluminum alloy of claim 1 or 2, wherein up to 0.95 wt% Mg is in the _Mg2Si phase, based on the total weight of the 6xxx aluminum alloy. 6xxx aluminum alloy according to claims 1 to 3, wherein up to 0.5 wt% Si is in the _Mg2Si phase, based on the total weight of the 6xxx aluminum alloy. 5. Any of claims 1-4 _, wherein 0.16 wt% to 0.78 wt% Mg, based on the total weight of _{the 6xxx aluminum alloy, is in the Al5Cu2Mg8Si5 ( "} Q") phase. 6xxx aluminum alloys as described. 6xxx aluminum alloy according to any of claims 1 to 5, wherein from 0.14 wt% to 0.68 wt% Si is in the Q phase, based on the total weight of the 6xxx aluminum alloy. 7. The 6xxx aluminum alloy of any of claims 1-6, wherein from 0.1 wt% to 0.5 wt% Cu is in the Q phase, based on the total weight of the 6xxx aluminum alloy. 8. The 6xxx aluminum alloy of any of claims 1-7, wherein from 0.11 wt% to 0.54 wt% Cu is in the _Al2Cu phase, based on the total weight of the 6xxx aluminum alloy. 9. A 6xxx aluminum alloy according to any preceding claim, having a yield strength of at least 350 MPa. 10. A 6xxx aluminum alloy according to any preceding claim, having a yield strength of at least 370 MPa. The 6xxx aluminum alloy of claims 1-9, having a yield strength of 350 MPa to 400 MPa. 6xxx aluminum alloy according to claims 1-11, having a yield strength of 370 MPa to 400 MPa. 6xxx aluminum alloy,
0.70% to 1.1% by weight silicon (Si) based on the total weight of the 6xxx aluminum alloy;
0.75% to 1.15% by weight magnesium (Mg) based on the total weight of the 6xxx aluminum alloy;
provided that the sum of Si and Mg is present in an amount of 1.5% to 2.2% by weight, based on the total weight of the 6xxx aluminum alloy, and the weight ratio of Mg to Si in the 6xxx aluminum alloy is 0 .68:1.0 to 1.65:1.0,
0.30 wt% to 0.8 wt% copper (Cu) based on the total weight of the 6xxx aluminum alloy;
0.12% to 0.3% by weight iron (Fe) based on the total weight of the 6xxx aluminum alloy;
0.25% to 0.65% by weight manganese (Mn) based on the total weight of the 6xxx aluminum alloy;
aluminum (Al);
optionally up to 0.2 wt% zirconium (Zr) based on the total weight of said 6xxx aluminum alloy;
optionally up to 0.2 wt% chromium (Cr) based on the total weight of said 6xxx aluminum alloy;
A 6xxx aluminum alloy consisting essentially of, optionally with other elements. 14. The 6xxx aluminum alloy of claim 13, wherein each of said other elements, if present, is present in less than 0.05 weight percent based on the total weight of said 6xxx aluminum alloy. 15. The 6xxx aluminum alloy of claim 13 or claim 14, wherein the sum of said other elements is less than 0.15 weight percent based on the total weight of said 6xxx aluminum alloy. 6xxx aluminum alloy,
0.70% to 1.1% by weight silicon (Si) based on the total weight of the 6xxx aluminum alloy;
0.75% to 1.15% by weight magnesium (Mg) based on the total weight of the 6xxx aluminum alloy;
provided that the weight ratio of Mg and Si in the 6xxx aluminum alloy is 0.68:1.0 to 1.65:1.0,
0.30% to 0.8% by weight copper (Cu), based on the total weight of said 6xxx aluminum alloy. 17. The 6xxx aluminum alloy of claim 16, wherein the sum of Si and Mg is present in an amount of 1.5% to 2.2% based on the total weight of said 6xxx aluminum alloy. 18. The 6xxx aluminum alloy of claim 16 or 17, further comprising 0.12 wt% to 0.3 wt% iron (Fe) based on the total weight of the 6xxx aluminum alloy. 19. The 6xxx aluminum alloy of claims 16-18, further comprising manganese (Mn) in an amount of 0.25 wt% to 0.65 wt% based on the total weight of the 6xxx aluminum alloy. 20. The 6xxx aluminum alloy of claims 16-19, further comprising up to 0.2 wt% zirconium (Zr) based on the total weight of the 6xxx aluminum alloy. 21. The 6xxx aluminum alloy of claims 16-20, further comprising up to 0.2 wt% chromium (Cr), based on the total weight of the 6xxx aluminum alloy. 22. The 6xxx aluminum alloy of claims 16-21, further comprising less than 0.05% by weight of other elements based on the total weight of the 6xxx aluminum alloy. 23. The 6xxx aluminum alloy of claim 22, wherein the sum of said other elements is less than 0.15 weight percent based on the total weight of the 6xxx aluminum alloy. 24. The claim 22 or 23, wherein said other element is selected from Titanium (Ti), Boron (B), Zinc (Zn), Molybdenum (Mo), Nickel (Ni), or any combination thereof. 6xxx aluminum alloy. a method,
casting a 6xxx aluminum alloy,
the 6xxx aluminum alloy comprises 0.70 wt% to 1.1 wt% silicon (Si) based on the total weight of the 6xxx aluminum alloy;
0.75% to 1.15% by weight magnesium (Mg) based on the total weight of the 6xxx aluminum alloy;
provided that the weight ratio of Mg and Si in the 6xxx aluminum alloy is 0.68:1.0 to 1.65:1.0,
casting a 6xxx aluminum alloy comprising 0.30 wt% to 0.8 wt% copper (Cu) based on the total weight of the 6xxx aluminum alloy;
homogenizing the 6xxx aluminum alloy;
A method comprising extruding the 6xxx aluminum alloy and aging the 6xxx aluminum alloy. 26. The method of claim 25, wherein the homogenizing comprises heating the 6xxx aluminum alloy to a homogenization temperature (T _H ) below the solidus temperature (T _S ) of the 6xxx aluminum alloy. The homogenizing may include the _Mg2Si phase of the 6xxx aluminum _alloy , the _Al5Cu2Mg8Si5 ("Q") phase of the _6xxx aluminum alloy, the Al2Cu phase _of the _6xxx aluminum alloy, or any of 27. The method of claim 25 or 26, comprising heating the 6xxx aluminum alloy to a T _H above at least one solvus temperature (T _[Sigma ]) in any combination. 28. The method of claim 26 or 27, wherein T _Σ of at least one of the Mg ₂ Si phase, Q phase, or any combination thereof is in the range of 520°C to 590°C. A method according to claims 26-28, wherein said T _H is in the range of 530°C to 600°C. The method of any of claims 26-29, wherein the 6xxx aluminum alloy has a T _s in the range of 540°C to 610°C. 31. The method of any of claims 25-30, wherein said homogenizing comprises heating said 6xxx aluminum alloy from room temperature to said T _H for 1-10 hours. 32. The method of any of claims 25-31, wherein said homogenizing comprises soaking said 6xxx aluminum alloy in air for 1-20 hours. 33. The method of any of claims 25-32, wherein said homogenizing further comprises air cooling said 6xxx aluminum alloy to room temperature. A method according to claims 25-33, wherein said extruding is performed at an exit temperature T _E , said T _E being controlled in the range of 450°C to 570°C. 35. The method of any of claims 25-34, further comprising quenching the 6xxx aluminum alloy. 36. The method of claim 35, wherein said quenching is water cooling. 37. A method according to claim 35 or 36, wherein said quenching is performed between homogenizing and extruding. 38. The method according to any one of claims 25 to 37, wherein said aging comprises natural aging, said natural aging being carried out for 1 to 96 hours. A method according to claims 25-38, wherein said aging comprises an artificial aging step, said artificial aging step being performed at an artificial aging temperature (T _AA ) of 150°C to 210°C for 1 to 32 hours.

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