US20220081741A1 - Aluminum alloys having silicon, magnesium, copper and zinc - Google Patents

Aluminum alloys having silicon, magnesium, copper and zinc Download PDF

Info

Publication number
US20220081741A1
US20220081741A1 US17/456,212 US202117456212A US2022081741A1 US 20220081741 A1 US20220081741 A1 US 20220081741A1 US 202117456212 A US202117456212 A US 202117456212A US 2022081741 A1 US2022081741 A1 US 2022081741A1
Authority
US
United States
Prior art keywords
aluminum alloy
sheet product
new aluminum
mpa
another embodiment
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
US17/456,212
Other languages
English (en)
Inventor
Timothy A. Hosch
James Daniel Bryant
Dirk C. Mooy
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Arconic Technologies LLC
Original Assignee
Arconic Technologies LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Arconic Technologies LLC filed Critical Arconic Technologies LLC
Priority to US17/456,212 priority Critical patent/US20220081741A1/en
Assigned to ARCONIC INC. reassignment ARCONIC INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BRYANT, JAMES DANIEL, MOOY, DIRK C., HOSCH, TIMOTHY A
Assigned to ARCONIC TECHNOLOGIES LLC reassignment ARCONIC TECHNOLOGIES LLC ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ARCONIC INC.
Publication of US20220081741A1 publication Critical patent/US20220081741A1/en
Assigned to JPMORGAN CHASE BANK, N.A. reassignment JPMORGAN CHASE BANK, N.A. NOTICE OF GRANT OF SECURITY INTEREST (ABL) IN INTELLECTUAL PROPERTY Assignors: ARCONIC TECHNOLOGIES LLC
Assigned to U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION reassignment U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION NOTICE OF GRANT OF SECURITY INTEREST IN INTELLECTUAL PROPERTY (FIRST LIEN) Assignors: ARCONIC TECHNOLOGIES LLC
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
    • C22C21/08—Alloys based on aluminium with magnesium as the next major constituent with silicon
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/02—Alloys based on aluminium with silicon as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/10—Alloys based on aluminium with zinc as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/12—Alloys based on aluminium with copper as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/12—Alloys based on aluminium with copper as the next major constituent
    • C22C21/14—Alloys based on aluminium with copper as the next major constituent with silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/12—Alloys based on aluminium with copper as the next major constituent
    • C22C21/16—Alloys based on aluminium with copper as the next major constituent with magnesium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/12—Alloys based on aluminium with copper as the next major constituent
    • C22C21/18—Alloys based on aluminium with copper as the next major constituent with zinc
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • C22F1/043—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with silicon as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • C22F1/047—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with magnesium as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • C22F1/05—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys of the Al-Si-Mg type, i.e. containing silicon and magnesium in approximately equal proportions
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • C22F1/053—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with zinc as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • C22F1/057—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with copper as the next major constituent

Definitions

  • 6xxx aluminum alloys are aluminum alloys having silicon and magnesium to produce the precipitate magnesium silicide (Mg 2 Si).
  • the alloy 6061 has been used in various applications for several decades. However, improving one or more properties of an aluminum alloy without degrading other properties is elusive. For automotive applications, a sheet having good formability prior to thermal treatment but with high strength after thermal treatment would be useful.
  • the present patent application relates to new aluminum alloys and methods for making the same.
  • the new aluminum alloys generally include from 0.70 to 1.4 wt. % Si, from 0.70 to 1.3 wt. % Mg, wherein (wt. % Mg)/(wt. % Si) is not greater than 1.40, from 0.70 to 3.0 wt. % Zn, from 0.55 to 1.3 wt. % Cu, wherein the total amount of Si+Mg+Zn+Cu is not greater than 4.25 wt. %, from 0.01 to 0.30 wt. % Fe, up to 0.70 wt. % Mn, up to 0.15 wt. % Cr, up to 0.20 wt.
  • the new aluminum alloys may realize an improved combination of properties, such as an improved combination of two or more of naturally aged strength, paint bake strength, T6 strength, formability, ductility, and corrosion resistance.
  • the new aluminum alloys may be used in a variety of applications, such as in automotive applications (e.g., as a sheet product).
  • the new aluminum alloys generally comprises (and in some instances consist essentially of, or consist of) from 0.70 to 1.4 wt. % Si, from 0.70 to 1.3 wt. % Mg, wherein (wt. % Mg)/(wt. % Si) is not greater than 1.40, from 0.70 to 3.0 wt. % Zn, from 0.55 to 1.3 wt. % Cu, wherein the total amount of Si+Mg+Zn+Cu is not greater than 4.25 wt. %, from 0.01 to 0.30 wt. % Fe, up to 0.70 wt. % Mn, up to 0.15 wt. % Cr, up to 0.20 wt.
  • % Zr up to 0.20 wt. % V, and up to 0.25 wt. % Ti, the balance being aluminum, optional incidental elements and impurities. Using these specific amounts of elements may result in unique and useful products for use in, for instance, automotive applications, where good formability prior to thermal treatment is required, high strength after thermal treatment is also required.
  • the new aluminum alloys generally include from 0.70 to 1.4 wt. % Si. Silicon may facilitate strength. As shown by the below examples, use of silicon outside this range may be detrimental.
  • a new aluminum alloy includes at least 0.75 wt. % Si.
  • a new aluminum alloy includes at least 0.80 wt. % Si.
  • a new aluminum alloy includes at least 0.85 wt. % Si.
  • a new aluminum alloy includes not greater than 1.35 wt. % Si.
  • a new aluminum alloy includes not greater than 1.30 wt. % Si.
  • a new aluminum alloy includes not greater than 1.25 wt. % Si.
  • a new aluminum alloy includes not greater than 1.20 wt. % Si. In yet another embodiment, a new aluminum alloy includes not greater than 1.15 wt. % Si. In another embodiment, a new aluminum alloy includes not greater than 1.10 wt. % Si. In yet another embodiment, a new aluminum alloy includes not greater than 1.05 wt. % Si.
  • the new aluminum alloys generally include from 0.70 to 1.3 wt. % Mg.
  • Magnesium may facilitate strength. As shown by the below examples, use of magnesium outside this range may be detrimental.
  • a new aluminum alloy includes at least 0.75 wt. % Mg. In another embodiment, a new aluminum alloy includes at least 0.80 wt. % Mg. In one embodiment, a new aluminum alloy includes not greater than 1.25 wt. % Mg. In another embodiment, a new aluminum alloy includes not greater than 1.20 wt. % Mg. In yet another embodiment, a new aluminum alloy includes not greater than 1.15 wt. % Mg. In another embodiment, a new aluminum alloy includes not greater than 1.10 wt. % Mg. In yet another embodiment, a new aluminum alloy includes not greater than 1.05 wt. % Mg.
  • the weight ratio of Mg: Si is generally not greater than 1.4:1.
  • the appropriate Mg:Si ratio may facilitate corrosion resistance at applicable strength levels. As shown by the below examples, use of a Mg:Si ratio outside this range may be detrimental.
  • a weight ratio of Mg: Si is not greater than 1.3:1.
  • a weight ratio of Mg: Si is not greater than 1.2:1.
  • a weight ratio of Mg: Si is at least 0.7:1.
  • a weight ratio of Mg:Si is at least 0.8:1.
  • a weight ratio of Mg:Si is at least 0.9:1.
  • the new aluminum alloys generally include from 0.70 to 3.0 wt. % Zn.
  • Zinc may facilitate strength and the appropriate natural aging response. As shown by the below examples, use of zinc outside this range may be detrimental.
  • a new aluminum alloy includes at least 0.75 wt. % Zn.
  • a new aluminum alloy includes at least 0.85 wt. % Zn.
  • a new aluminum alloy includes at least 0.95 wt. % Zn.
  • a new aluminum alloy includes at least 1.0 wt. % Zn.
  • a new aluminum alloy includes at least 1.05 wt. % Zn.
  • a new aluminum alloy includes not greater than 2.8 wt.
  • a new aluminum alloy includes not greater than 2.6 wt. % Zn. In yet another embodiment, a new aluminum alloy includes not greater than 2.4 wt. % Zn. In another embodiment, a new aluminum alloy includes not greater than 2.2 wt. % Zn. In yet another embodiment, a new aluminum alloy includes not greater than 2.0 wt. % Zn. In another embodiment, a new aluminum alloy includes not greater than 1.8 wt. % Zn.
  • the new aluminum alloys generally include from 0.55 to 1.3 wt. % Cu. Copper may facilitate strength, corrosion resistance and natural aging response. As shown by the below examples, use of copper outside this range may be detrimental.
  • a new aluminum alloy includes at least 0.60 wt. % Cu. In another embodiment, a new aluminum alloy includes at least 0.65 wt. % Cu. In yet another embodiment, a new aluminum alloy includes at least 0.70 wt. % Cu. In one embodiment, a new aluminum alloy includes not greater than 1.25 wt. % Cu. In another embodiment, a new aluminum alloy includes not greater than 1.20 wt. % Cu. In yet another embodiment, a new aluminum alloy includes not greater than 1.15 wt. % Cu. In another embodiment, a new aluminum alloy includes not greater than 1.10 wt. % Cu. In yet another embodiment, a new aluminum alloy includes not greater than 1.05 wt. % Cu.
  • solute in the alloy is limited, wherein the total amount of Si+Mg+Zn+Cu is not greater than 4.25 wt. %. As shown by the below examples, use of too much solute may be detrimental. Thus, the stated limit.
  • the new aluminum alloys generally include from 0.01 to 0.30 wt. % Fe. Iron may facilitate a proper grain structure and using more than 0.10 wt. % Fe iron may be cost effective. Use of iron outside this range may be cost ineffective and/or detrimental. The amount of iron in the alloy should be restricted such that large primary particles are avoided/restricted/limited during production of aluminum alloy products.
  • a new aluminum alloy includes at least 0.05 wt. % Fe.
  • a new aluminum alloy includes at least 0.10 wt. % Fe.
  • a new aluminum alloy includes at least 0.12 wt. % Fe.
  • a new aluminum alloy includes not greater than 0.25 wt. % Fe.
  • a new aluminum alloy includes not greater than 0.22 wt. % Fe. In yet another embodiment, a new aluminum alloy includes not greater than 0.19 wt. % Fe. In another embodiment, a new aluminum alloy includes not greater than 0.16 wt. % Fe.
  • the new aluminum alloys may include up to 0.70 wt. % Mn.
  • Manganese may facilitate the proper grain structure. Use of manganese outside this range may be detrimental. The amount of manganese in the alloy should be restricted such that large primary particles are avoided/restricted/limited during production of aluminum alloy products.
  • a new aluminum alloy includes at least 0.05 wt. % Mn.
  • a new aluminum alloy includes at least 0.10 wt. % Mn.
  • a new aluminum alloy includes at least 0.15 wt. % Mn.
  • a new aluminum alloy includes not greater than 0.60 wt. % Mn.
  • a new aluminum alloy includes not greater than 0.50 wt. % Mn.
  • a new aluminum alloy includes not greater than 0.45 wt. % Mn.
  • a new aluminum alloy includes not greater than 0.40 wt. % Mn.
  • the new aluminum alloys include not greater than 0.15 wt. % Cr. Using more than 0.15 wt. % chromium may be detrimental to the grain structure and may causes issues with alloy recyclability.
  • a new aluminum alloy includes not greater than 0.12 wt. % Cr.
  • a new aluminum alloy includes not greater than 0.10 wt. % Cr.
  • a new aluminum alloy includes not greater than 0.08 wt. % Cr.
  • a new aluminum alloy includes not greater than 0.06 wt. % Cr.
  • a new aluminum alloy includes not greater than 0.04 wt. % Cr.
  • a new aluminum alloy includes not greater than 0.03 wt. % Cr. In yet another embodiment, a new aluminum alloy includes not greater than 0.02 wt. % Cr. In another embodiment, a new aluminum alloy includes not greater than 0.01 wt. % Cr.
  • the new aluminum alloys include not greater than 0.20 wt. % Zr.
  • Zirconium is less preferred than manganese for grain structure control, but still may be useful.
  • the amount of zirconium in the alloy should be restricted such that large primary particles are avoided/restricted/limited during production of aluminum alloy products.
  • a new aluminum alloy includes not greater than 0.15 wt. % Zr.
  • a new aluminum alloy includes not greater than 0.10 wt. % Zr.
  • a new aluminum alloy includes not greater than 0.08 wt. % Zr.
  • a new aluminum alloy includes not greater than 0.03 wt. % Zr.
  • a new aluminum alloy includes not greater than 0.01 wt. % Zr. In one embodiment, a new aluminum alloy includes at least 0.01 wt. % Zr (e.g., when Zr is added/used to the alloy for grain structure control.) In another embodiment, a new aluminum alloy includes at least 0.05 wt. % Zr. In one embodiment, a new aluminum alloy includes from 0.07 to 0.15 wt. % Zr.
  • the new aluminum alloys include not greater than 0.20 wt. % V. Vanadium is less preferred than manganese for grain structure control, but still may be useful. The amount of vanadium in the alloy should be restricted such that large primary particles are avoided/restricted/limited during production of aluminum alloy products.
  • a new aluminum alloy includes not greater than 0.15 wt. % V.
  • a new aluminum alloy includes not greater than 0.10 wt. % V.
  • a new aluminum alloy includes not greater than 0.08 wt. % V.
  • a new aluminum alloy includes not greater than 0.03 wt. % V.
  • a new aluminum alloy includes not greater than 0.01 wt.
  • a new aluminum alloy includes at least 0.01 wt. % V (e.g., when V is added/used to the alloy for grain structure control.) In another embodiment, a new aluminum alloy includes at least 0.05 wt. % V. In one embodiment, a new aluminum alloy includes from 0.07 to 0.15 wt. % V.
  • the new aluminum alloys include not greater than 0.25 wt. % Ti. Titanium may be used during casting for grain refinement. Higher levels of titanium may also facilitate corrosion resistance. The amount of titanium in the alloy should be restricted such that large primary particles are avoided/restricted/limited during production of alloy products.
  • a new aluminum alloy includes at least 0.005 wt. % Ti.
  • a new aluminum alloy includes at least 0.01 wt. %Ti.
  • a new aluminum alloy includes at least 0.02 wt. %Ti.
  • a new aluminum alloy includes at least 0.05 wt. % Ti. In one embodiment, a new a new aluminum alloy includes not greater than 0.20 wt.
  • a new a new aluminum alloy includes not greater than 0.15 wt. %Ti. In another embodiment, a new aluminum alloy includes not greater than 0.12 wt. % Ti. In yet another embodiment, a new a new aluminum alloy includes not greater than 0.10 wt. %Ti. In another embodiment, a new a new aluminum alloy includes not greater than 0.08 wt. %Ti. In yet another embodiment, a new a new aluminum alloy includes not greater than 0.05 wt. %Ti. In another embodiment, a new a new aluminum alloy includes not greater than 0.03 wt. %Ti. In one embodiment, a new a new aluminum alloy includes from 0.005 to 0.10 wt.
  • a new aluminum alloy includes from 0.01 to 0.05 wt. % Ti. In yet another embodiment, a new aluminum alloy includes from 0.01 to 0.03 wt. % Ti.
  • the titanium may be in elemental form or in the form of compounds (e.g., TiB 2 or TiC).
  • incidental elements means those elements or materials, other than the above listed elements, that may optionally be added to the alloy to assist in the production of the alloy.
  • incidental elements include casting aids, such as grain refiners and deoxidizers.
  • Optional incidental elements may be included in the alloy in a cumulative amount of up to 1.0 wt. %.
  • one or more incidental elements may be added to the alloy during casting to reduce or restrict (and is some instances eliminate) ingot cracking due to, for example, oxide fold, pit and oxide patches. These types of incidental elements are generally referred to herein as deoxidizers.
  • Examples of some deoxidizers include Ca, Sr, and Be.
  • calcium (Ca) is included in the alloy, it is generally present in an amount of up to about 0.05 wt. %, or up to about 0.03 wt. %.
  • Ca is included in the alloy in an amount of about 0.001-0.03 wt. % or about 0.05 wt. %, such as 0.001-0.008 wt. % (or 10 to 80 ppm).
  • Strontium (Sr) may be included in the alloy as a substitute for Ca (in whole or in part), and thus may be included in the alloy in the same or similar amounts as Ca.
  • Be beryllium
  • some embodiments of the alloy are substantially Be-free.
  • Be is included in the alloy, it is generally present in an amount of up to about 20 ppm.
  • Incidental elements may be present in minor amounts, or may be present in significant amounts, and may add desirable or other characteristics on their own without departing from the alloy described herein, so long as the alloy retains the desirable characteristics described herein. It is to be understood, however, that the scope of this disclosure should not/cannot be avoided through the mere addition of an element or elements in quantities that would not otherwise impact on the combinations of properties desired and attained herein.
  • the new aluminum alloys may contain low amounts of impurities.
  • a new aluminum alloy includes not greater than 0.15 wt. %, in total, of the impurities, and wherein the new aluminum alloy includes not greater than 0.05 wt. % of each of the impurities.
  • a new aluminum alloy includes not greater than 0.10 wt. %, in total, of the impurities, and wherein the new aluminum alloy includes not greater than 0.03 wt. % of each of the impurities.
  • the new aluminum alloys may be useful in a variety of product forms, including ingot or billet, wrought product forms (plate, forgings and extrusions), shape castings, additively manufactured products, and powder metallurgy products, for instance.
  • the new aluminum alloys may be processed into a variety of wrought forms, such as in rolled form (sheet, plate), as an extrusion, or as a forging, and in a variety of tempers.
  • the new aluminum alloys may be cast (e.g., direct chill cast or continuously cast), and then worked (hot and/or cold worked) into the appropriate product form (sheet, plate, extrusion, or forging).
  • the new aluminum alloys may be processed to one of a T temper, a W temper, or an F temper as per ANSI H35.1 (2009).
  • a new aluminum alloy is processed to a “T temper” (thermally treated).
  • the new aluminum alloys may be processed to any of a T1, T2, T3, T4, T5, T6, T7, T8, T9 or T10 temper as per ANSI H35.1 (2009).
  • the product is processed to a T43 temper (e.g., as per the below examples).
  • the product is processed to a T6 temper (e.g., as per the below examples).
  • a new aluminum alloy is processed to an “W temper” (solution heat treated).
  • no solution heat treatment is applied after working the aluminum alloy into the appropriate product form, and thus the new aluminum alloys may be processed to an “F temper” (as fabricated).
  • a new aluminum alloys is a sheet product.
  • the sheet product has a thickness of from 1.0 to 4.0 mm.
  • the sheet product is processed to a T4 temper.
  • the sheet product is processed to a T43 temper.
  • the sheet product is processed to a T43 temper and then paint baked (e.g., by heating at 180° C. for 20 minutes).
  • the sheet product is processed to a T43 temper, then paint baked, and then artificially aged to a T6 temper (e.g., by heating at 180° C. for 8 hours).
  • T6 temper e.g., by heating at 180° C. for 8 hours.
  • Such sheet products may be useful in automotive applications, as described in further detail below.
  • TYS-7NA a TYS-LT of not greater than 155 MPa at 7 days of natural aging
  • TYS-90NA a TYS-LT of not greater than 175 MPa at 90 days of natural aging
  • the aluminum alloy sheet product realizes at least two of the above properties (i)-(vi). In another embodiment, the aluminum alloy sheet product realizes at least three of the above properties (i)-(vi). In yet another embodiment, the aluminum alloy sheet product realizes at least four of the above properties (i)-(vi). In another embodiment, the aluminum alloy sheet product realizes at least five of the above properties (i)-(vi). In yet another embodiment, the aluminum alloy sheet product realizes all of the above properties (i)-(vi).
  • TYS-LT means the long transverse tensile yield strength (0.2% offset) of a product as measured in accordance with ASTM E8 and B557.
  • TYS-7NA means the long transverse tensile yield strength of a product at seven days of natural aging.
  • TYS-90NA means the long transverse tensile yield strength of a product at ninety days of natural aging.
  • paint baking is the application of heat to the product to cure paints or other polymers thereon.
  • a typically automotive paint bake is heating to 180° C. and then holding at 180° C. for 20 minutes (e.g., in a furnace), followed by air cooling to ambient.
  • a new aluminum alloy sheet product may realize a TYS-LT of not greater than 155 MPa at 7 days of natural aging (i.e., TYS-7NA ⁇ 155 MPa). Low strength after natural aging is important to allow for subsequent forming of the material (e.g., into automotive sheet components).
  • a new aluminum alloy sheet product may realize a TYS-LT of not greater than 150 MPa at 7 days of natural aging (i.e., TYS-7NA ⁇ 150 MPa).
  • a new aluminum alloy sheet product may realize a TYS-LT of not greater than 145 MPa at 7 days of natural aging (i.e., TYS-7NA ⁇ 145 MPa).
  • a new aluminum alloy sheet product may realize a TYS-LT of not greater than 175 MPa at 90 days of natural aging (i.e., TYS-90NA ⁇ 175 MPa).
  • Low strength after natural aging is important to allow for subsequent forming of the material (e.g., into automotive sheet components).
  • automotive sheet products may lie in inventory for several months, so the natural aging response/strength needs to be/remain low for extended periods of time.
  • a new aluminum alloy sheet product may realize a TYS-LT of not greater than 170 MPa at 90 days of natural aging (i.e., TYS-90NA ⁇ 170 MPa).
  • a new aluminum alloy sheet product may realize a TYS-LT of not greater than 165 MPa at 90 days of natural aging (i.e., TYS-90NA ⁇ 165 MPa). In yet another embodiment, a new aluminum alloy sheet product may realize a TYS-LT of not greater than 160 MPa at 90 days of natural aging (i.e., TYS-90NA ⁇ 160 MPa). In another embodiment, a new aluminum alloy sheet product may realize a TYS-LT of not greater than 155 MPa at 90 days of natural aging (i.e., TYS-90NA ⁇ 155 MPa).
  • a new aluminum alloy sheet product may realize a (TYS-90NA) minus (TYS-7NA) of not greater than 20 MPa. That is, the strength of the sheet product increases by not greater than 20 MPa from 7 days of natural aging to 90 days of natural aging.
  • a new aluminum alloy sheet product may realize a (TYS-90NA) minus (TYS-7NA) of not greater than 18 MPa.
  • a new aluminum alloy sheet product may realize a (TYS-90NA) minus (TYS-7NA) of not greater than 15 MPa.
  • a new aluminum alloy sheet product may realize a (TYS-90NA) minus (TYS-7NA) of not greater than 12 MPa. In yet another embodiment, a new aluminum alloy sheet product may realize a (TYS-90NA) minus (TYS-7NA) of not greater than 10 MPa. In another embodiment, a new aluminum alloy sheet product may realize a (TYS-90NA) minus (TYS-7NA) of not greater than 8 MPa.
  • a new aluminum alloy sheet product may realize a TYS-LT of at least 235 MPa when naturally aged for 30 days followed by paint baking at 180° C. for 20 minutes. (The phrase “when naturally aged for 30 days followed by paint baking at 180° C. for 20 minutes” is abbreviated herein as “30 days NA+paint bake.”) Paint baking generally occurs after natural aging and after the product has been formed, so high post-paint baking strength may be important.
  • a new aluminum alloy sheet product may realize a TYS-LT of at least 240 MPa 30 days NA+paint bake.
  • a new aluminum alloy sheet product may realize a TYS-LT of at least 245 MPa 30 days NA+paint bake.
  • a new aluminum alloy sheet product may realize a TYS-LT of at least 250 MPa 30 days NA+paint bake. In another embodiment, a new aluminum alloy sheet product may realize a TYS-LT of at least 255 MPa 30 days NA+paint bake. In yet another embodiment, a new aluminum alloy sheet product may realize a TYS-LT of at least 260 MPa 30 days NA+paint bake. In another embodiment, a new aluminum alloy sheet product may realize a TYS-LT of at least 265 MPa 30 days NA+paint bake. In yet another embodiment, a new aluminum alloy sheet product may realize a TYS-LT of at least 270 MPa 30 days NA+paint bake.
  • a new aluminum alloy sheet product may realize a TYS-LT of at least 230 MPa when naturally aged for 90 days followed by paint baking at 180° C. for 20 minutes. (The phrase “when naturally aged for 90 days followed by paint baking at 180° C. for 20 minutes” is abbreviated herein as “90 days NA+paint bake.”) It may be important for the strength decrease after paint bake to be low (e.g., to ensure the product retains a high strength). In one embodiment, a new aluminum alloy sheet product may realize a TYS-LT of at least 235 MPa 90 days NA+paint bake. In another embodiment, a new aluminum alloy sheet product may realize a TYS-LT of at least 240 MPa 90 days NA+paint bake.
  • a new aluminum alloy sheet product may realize a TYS-LT of at least 350 MPa when naturally aged for 30 days followed by artificial aging at 180° C. for 8 hours. (The phrase “when naturally aged for 30 days followed by artificial aging at 180° C. for 8 hours” is abbreviated herein as “30 days NA+AA.”)
  • it may be useful to artificially age a product (e.g., a naturally aged product and/or a paint baked product) to increase its strength, and achieving high strength may be important.
  • a new aluminum alloy sheet product may realize a TYS-LT of at least 355 MPa 30 days NA+AA .
  • a new aluminum alloy sheet product may realize a TYS-LT of at least 360 MPa 30 days NA+AA. In yet another embodiment, a new aluminum alloy sheet product may realize a TYS-LT of at least 365 MPa 30 days NA+AA. In another embodiment, a new aluminum alloy sheet product may realize a TYS-LT of at least 370 MPa 30 days NA+AA.
  • the T6 tempering by artificial aging may be heating for any suitable period(s) of time and at any suitable temperature(s). In one embodiment, the T6 tempering is heating at 180° C. for 8 hours, or a substantially similar aging condition, as shown above. As appreciated by those skilled in the art, aging temperatures and/or times may be adjusted based on well-known aging principles and/or formulas.
  • a new aluminum alloy sheet may also realize other important properties, such as ductility and corrosion resistance.
  • a new aluminum alloy sheet product may realize an elongation (4D) of at least 15% in the T43 temper when tested in accordance with ASTM E8 and B557.
  • a new aluminum alloy sheet product realizes an elongation of at least 18% in the T43 temper.
  • a new aluminum alloy sheet product realizes an elongation of at least 20% in the T43 temper.
  • a new aluminum alloy sheet product realizes an elongation of at least 22% in the T43 temper.
  • a new aluminum alloy sheet product realizes an elongation of at least 24% in the T43 temper.
  • a new aluminum alloy sheet product realizes an elongation of at least 26% in the T43 temper.
  • a new aluminum alloy sheet product realizes an elongation of at least 28% in the T43 temper.
  • a new aluminum alloy sheet product may realize an elongation (4D) of at least 10% in the paint baked condition (e.g., T43+paint bake) when tested in accordance with ASTM E8 and B557.
  • a new aluminum alloy sheet product realizes an elongation of at least 12% in the paint baked condition.
  • a new aluminum alloy sheet product realizes an elongation of at least 14% in the paint baked condition.
  • a new aluminum alloy sheet product realizes an elongation of at least 16% in the paint baked condition.
  • a new aluminum alloy sheet product realizes an elongation of at least 18% in the paint baked condition.
  • a new aluminum alloy sheet product realizes an elongation of at least 20% in the paint baked condition.
  • a new aluminum alloy sheet product is corrosion resistant.
  • the corrosion resistance is at least intergranular corrosion resistance.
  • the corrosion resistance is at least filiform corrosion resistance.
  • the corrosion resistance is both intergranular corrosion resistance and filiform corrosion resistance. Intergranular corrosion resistance is to be measured in accordance with ASTM G110 (5 specimens). Filiform corrosion resistance is to be measured in accordance with ASTM G85-2, and wherein, after exposing samples for 3 weeks, the longest filiform corrosion resistance perpendicular to each of three separate scribes is to be determined.
  • a new aluminum alloy sheet product realizes a maximum depth of attack of not greater than 225 micrometers and an average depth of attack of not greater than 150 micrometers.
  • a new aluminum alloy sheet product realizes a maximum track length of not greater than 0.35 inch, and with at least 8 tracks being tested. In another embodiment, a new aluminum alloy sheet product realizes a maximum track length of not greater than 0.30 inch, and with at least 8 tracks being tested.
  • a new aluminum alloy product may be crack-free after forming (e.g., when pressed/formed into an automotive component, such as an automotive panel).
  • a new aluminum alloy product is crack-free after forming (e.g., when pressed/formed into an automotive panel/component), is strong (after paint baking and/or T6 tempering, and as defined above), and as is corrosion resistant.
  • the new aluminum alloy described herein may be used in a variety of applications, such as an automotive, rail, aerospace, or consumer electronics application.
  • a new aluminum alloy may be formed into an automotive part.
  • automotive parts include automotive bodies and automotive panels.
  • Non-limiting examples of automotive panels may be outer panels, inner panels for use in car doors, car hoods, or car trunks (deck lids), among others.
  • One example of an automotive body product may be a structural component, which may be used in welding together sheet metal components of a car body (e.g., body-in-white).
  • the new aluminum alloys may also be used in other transportation applications, such as light or heavy trucks.
  • Consumer electronic product applications include laptop computer cases, battery cases, among other stamped and formed products.
  • a aluminum alloy sheet product comprising:
  • the balance being aluminum, optional incidental elements and impurities;
  • the aluminum alloy sheet product has a thickness of from 1.0 to 4.0 mm;
  • the aluminum sheet product realizes at least one of the following properties:
  • TYS-7NA a TYS-LT of not greater than 155 MPa at 7 days of natural aging
  • TYS-90NA a TYS-LT of not greater than 175 MPa at 90 days of natural aging
  • Clause 3 The aluminum alloy sheet product of clauses 1-2, wherein the aluminum alloy includes not greater than 1.35 wt. % Si, or not greater than 1.30 wt. % Si, or not greater than 1.25 wt. % Si, or not greater than 1.20 wt. % Si, or not greater than 1.15 wt. % Si, or not greater than 1.10 wt. % Si, or not greater than 1.05 wt. % Si.
  • Clause 4 The aluminum alloy sheet product of any of clauses 1-3, wherein the aluminum alloy includes at least 0.75 wt. % Mg, or at least 0.80 wt. % Mg.
  • Clause 5 The aluminum alloy sheet product of any of clauses 1-4, wherein the aluminum alloy includes not greater than 1.25 wt. % Mg, or not greater than 1.20 wt. % Mg, or not greater than 1.15 wt. % Mg, or not greater than 1.10 wt. % Mg, or not greater than 1.05 wt. % Mg.
  • Clause 7 The aluminum alloy sheet product of any of clauses 1-6, wherein (wt. % Mg)/(wt. % Si) is at least 0.7:1, or at least 0.8:1, or at least 0.9:1.
  • Clause 8 The aluminum alloy sheet product of any of clauses 1-7, wherein the aluminum alloy includes at least 0.75 wt. % Zn, or at least 0.85 wt. % Zn, or at least 0.95 wt. % Zn, or at least 1.0 wt. % Zn, or at least 1.05 wt. % Zn.
  • Clause 9 The aluminum alloy sheet product of any of clauses 1-8, wherein the aluminum alloy includes not greater than 2.8 wt. % Zn, or not greater than 2.6 wt. % Zn, or not greater than 2.4 wt. % Zn, or not greater than 2.2 wt. % Zn, or not greater than 2.0 wt. % Zn, or not greater than 1.8 wt. % Zn.
  • Clause 10 The aluminum alloy sheet product of any of clauses 1-9, wherein the aluminum alloy includes at least 0.60 wt. % Cu, or at least 0.65 wt. % Cu, or at least 0.70 wt. % Cu.
  • Clause 11 The aluminum alloy sheet product of any of clauses 1-10, wherein the aluminum alloy includes not greater than 1.25 wt. % Cu, or not greater than 1.20 wt. % Cu, or not greater than 1.15 wt. % Cu, or not greater than 1.10 wt. % Cu, or not greater than 1.05 wt. % Cu.
  • Clause 12 The aluminum alloy sheet product of any of clauses 1-11, wherein the aluminum alloy includes at least 0.05 wt. % Fe, or at least 0.10 wt. % Fe, or at least 0.12 wt. % Fe.
  • Clause 13 The aluminum alloy sheet product of any of clauses 1-12, wherein the aluminum alloy includes not greater than 0.25 wt. % Fe, or not greater than 0.22 wt. % Fe, or not greater than 0.19 wt. % Fe, or not greater than 0.16 wt. % Fe.
  • Clause 14 The aluminum alloy sheet product of any of clauses 1-13, wherein the aluminum alloy includes at least 0.05 wt. % Mn, or at least 0.10 wt. % Mn, or at least 0.15 wt. % Mn.
  • Clause 15 The aluminum alloy sheet product of any clauses 1-14, wherein the aluminum alloy includes not greater than 0.60 wt. % Mn, or not greater than 0.50 wt. % Mn, or not greater than 0.45 wt. % Mn, or not greater than 0.40 wt. % Mn.
  • Clause 16 The aluminum alloy sheet product of any of clauses 1-15, wherein the aluminum alloy includes not greater than 0.12 wt. % Cr, or not greater than 0.10 wt. % Cr, or not greater than 0.08 wt. % Cr, or not greater than 0.06 wt. % Cr, or not greater than 0.04 wt. % Cr, or not greater than 0.03 wt. % Cr, or not greater than 0.02 wt. % Cr, or not greater than 0.01 wt. % Cr.
  • Clause 17 The aluminum alloy sheet product of any of clauses 1-16, wherein the aluminum alloy includes not greater than 0.15 wt. % Zr, or not greater than 0.10 wt. % Zr, or not greater than 0.08 wt. % Zr, or not greater than 0.05 wt. % Zr, or not greater than 0.03 wt. % Zr.
  • Clause 18 The aluminum alloy sheet product of any of clauses 1-17, wherein the aluminum alloy includes at least 0.01 wt. % Zr.
  • Clause 19 The aluminum alloy sheet product of any of clauses 1-18, wherein the aluminum alloy includes not greater than 0.15 wt. % V, or not greater than 0.10 wt. % V, or not greater than 0.08 wt. % V, or not greater than 0.05 wt. % V, or not greater than 0.03 wt. % V.
  • Clause 20 The aluminum alloy sheet product of any of clauses 1-19, wherein the aluminum alloy includes at least 0.01 wt. % V.
  • Clause 21 The aluminum alloy sheet product of any of clauses 1-20, wherein the aluminum alloy includes not greater than 0.12 wt. % Ti, or not greater than 0.10 wt. % Ti.
  • Clause 22 The aluminum alloy sheet product of any of clauses 1-21, wherein the aluminum alloy includes at least 0.01 wt. % Ti or at least 0.02 wt. % Ti, or at least 0.05 wt. % Ti.
  • Clause 29 The automotive sheet product of any of clauses 23-28, wherein the sheet product realizes property (i), and wherein property (i) is not greater than 155 MPa, or not greater than 150 MPa, or not greater than 145 MPa.
  • Clause 30 The automotive sheet product of any of clauses 23-29, wherein the sheet product realizes property (ii), and wherein property (ii) is not greater than 175 MPa, or not greater than 170 MPa, or not greater than 165 MPa, or not greater than 160 MPa, or not greater than 155 MPa.
  • Clause 31 The automotive sheet product of any of clauses 23-30, wherein the sheet product realizes property (iii), and wherein property (iii) is not greater than 20 MPa, or not greater than 18 MPa, or not greater than 15 MPa, or not greater than 12 MPa, or not greater than 10 MPa, or not greater than 8 MPa.
  • Clause 32 The automotive sheet product of any of clauses 23-31, wherein the sheet product realizes property (iv), and wherein property (iv) is at least 235 MPa, or at least 240 MPa, or at least 250 MPa, or at least 255 MPa, or at least 260 MPa, or at least 265 MPa, or at least 270 MPa.
  • Clause 33 The automotive sheet product of any of clauses 23-32, wherein the sheet product realizes property (v), and wherein property (v) is at least 230 MPa, or at least 235 MPa, or at least 240 MPa, or at least 245 MPa, or at least 250 MPa.
  • Clause 34 The automotive sheet product of any of clauses 23-33, wherein the sheet product realizes property (vi), and wherein property (vi) is at least 350 MPa, or at least 355 MPa, or at least 360 MPa, or at least 365 MPa, or at least 370 MPa.
  • Clause 35 The automotive sheet product of any of clauses 23-34, wherein the sheet product realizes an elongation of at least 15% in the T43 temper, or an elongation of at least 18%, or an elongation of at least 20%, or an elongation of at least 22%, or an elongation of at least 24%, or an elongation of at least 26%, or an elongation of at least 28%.
  • Clause 36 The automotive sheet product of any of clauses 23-35, wherein the sheet product realizes an elongation of at least 10% after paint baking at 180° C. for 20 minutes, or an elongation of at least 12%, or an elongation of at least 14%, or an elongation of at least 16%, or an elongation of at least 18%, or an elongation of at least 20%.
  • Clause 37 The automotive sheet product of any of clauses 23-36, wherein the sheet product realizes an elongation of at least 10% after artificial aging at 180° C. for 8 hours, or an elongation of at least 11%, or an elongation of at least 12%, or an elongation of at least 13%, or an elongation of at least 14%, or an elongation of at least 15%.
  • Clause 40 The automotive sheet product of any of clauses 23-37, wherein the sheet product is crack-free.
  • the term “or” is an inclusive “or” operator, and is equivalent to the term “and/or,” unless the context clearly dictates otherwise.
  • the term “based on” is not exclusive and allows for being based on additional factors not described, unless the context clearly dictates otherwise.
  • the meaning of “a,” “an,” and “the” include plural references, unless the context clearly dictates otherwise.
  • the meaning of “in” includes “in” and “on”, unless the context clearly dictates otherwise.
  • AA6055-style alloy as per U.S. Pat. No. 6,537,392.
  • the Aluminum Association composition limits on the AA6055 alloy are as follows: 0.6-1.2 wt. % Si, 0.30 (max) wt. % Fe, 0.50-1.0 wt. % Cu, 0.10 (max) wt. % Mn, 0.7-1.1 wt. % Mg, 0.20-0.30 wt.
  • Alloys 18, 21-22 and 27 are invention alloys. Alloys 1-17, 19-20 and 23-26 and 28-30 are non-invention alloys and are highlighted in gray.
  • the ingots were homogenized and then rolled to final gauge sheet products.
  • the final gauge sheet products had a thickness of 2 mm.
  • the final gauge sheet products were then solution heat treated, quenched to room temperature, and then re-heated to a pre-aging temperature of 82° C. (179.6° F.), and then subject to a simulated coil cool by holding in a furnace programmed to cool at a prescribed cooling rate (consistent with Newtonian cooling) to bring the alloys to a T43 temper.
  • the natural aging response of the alloys was then evaluated by measuring each alloy's mechanical properties at 7 and 90 days of natural aging (as measured from the time the alloys were quenched after solution heat treatment).
  • the paint bake response of the T43 tempered alloys was also tested by heating to 180° C. for 20 minutes.
  • the artificial aging response of the alloys was also tested by aging the T43 tempered alloy at 180° C. for 8 hours (a T6-type temper).
  • Example 1 Mechanical Properties of Example 1 Alloys 7 Days 90 Days (90-7 30 days 90 days 30 days Alloy of NA of NA days NA) post PB post PB post T6 1 212 231 19 N/A N/A N/A 2 230 246* 16* N/A N/A N/A 3 260 270* 10* N/A N/A N/A 4 281 294* 13* N/A N/A N/A 5 239 259 20 N/A N/A N/A 6 268 285 17 N/A N/A N/A 7 235 254 20 N/A N/A N/A 8 288 308 21 N/A N/A N/A 9 131 150 19 231 219 342 10 166 171 5 246 238 349 11 150 162 12 237 229 355 12 150 153 3 244 236 352 13 129 150 21 231 223 342 14 151 155 4 232 232 346 15 132 142 10 224 213 322 16 157 164
  • non-invention alloys 1-8, 10, 16, 26, and 28 fail to meet the parameter of a TYS-LT of not greater than 155 MPa at 7 days of natural aging and/or not greater than 175 MPa at 90 days of natural aging. Further, the strength of non-invention alloys 8, 13, 17, 20, and 30 increased too much (more than 20 MPa) between 7 days of natural aging and 90 days of natural aging. Achieving strengths of not greater than 155 MPa at 7 days of natural aging, not greater than 175 MPa at 90 days of natural aging, and with not greater than a 20 MPa increase in strength from 7 days of natural aging to 90 days of natural aging is important for formability purposes.
  • Paint Bake Properties As shown, non-invention alloys 9, 11, 13-15, 17, 20, 23 and 25 realized insufficient post paint baking strengths, having a TYS-LT of less than 235 MPa 30 days after paint baking and/or having a TYS-LT of less than 230 MPa 90 days after paint baking. Low post paint baking strength and loss of strength over time after paint baking is not acceptable for most automotive applications.
  • Non-invention alloys 9-10, 13-15, 20, 23, 25 and 30 all realized insufficient artificial aging strengths, having a TYS-LT of less than 350 MPa after artificial aging. Low artificial aging strength may make the alloys inapplicable for some automotive applications.
  • the intergranular corrosion resistance of the alloys is generally acceptable.
  • the filiform corrosion of alloys 6-7, 10, 14 and 24 is too high on a maximum length basis, being greater than 0.30 inch.
  • alloy 12 would behave similar to alloys 10 and 14 as it relates to filiform corrosion, so alloy 12 is considered a non-invention alloy.
  • alloy 19 would behave similar to alloy 24 as it relates to filiform corrosion, so alloy 19 is considered a non-invention alloy.
  • alloys with too much solute may realize unacceptable strength and/or corrosion resistance.
  • the amount of Si+Mg+Cu+Zn is limited to not greater than 4.25 wt. %.
  • the specific amounts of silicon and magnesium are also important. Too little silicon (e.g., alloys 15 and 23) results in poor properties.
  • the Mg:Si ratio should be not greater than 1.4 as shown by alloys 15 and 25, whose high Mg:Si ratios were at least partially responsible for their poor strengths. High amounts of both copper and zinc should be used to successfully achieve good strength and corrosion resistance. This is shown by contrasting invention alloys 18, 21-22 and 27 versus various non-invention alloys.
  • chromium should be avoided, as it negatively impacts potential properties (per alloy 30) and also potentially affects the recyclability of the alloys.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Laminated Bodies (AREA)
  • Metal Rolling (AREA)
US17/456,212 2019-06-06 2021-11-23 Aluminum alloys having silicon, magnesium, copper and zinc Pending US20220081741A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US17/456,212 US20220081741A1 (en) 2019-06-06 2021-11-23 Aluminum alloys having silicon, magnesium, copper and zinc

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US201962858209P 2019-06-06 2019-06-06
PCT/US2020/033806 WO2020247178A1 (en) 2019-06-06 2020-05-20 Aluminum alloys having silicon, magnesium, copper and zinc
US17/456,212 US20220081741A1 (en) 2019-06-06 2021-11-23 Aluminum alloys having silicon, magnesium, copper and zinc

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2020/033806 Continuation WO2020247178A1 (en) 2019-06-06 2020-05-20 Aluminum alloys having silicon, magnesium, copper and zinc

Publications (1)

Publication Number Publication Date
US20220081741A1 true US20220081741A1 (en) 2022-03-17

Family

ID=73653349

Family Applications (1)

Application Number Title Priority Date Filing Date
US17/456,212 Pending US20220081741A1 (en) 2019-06-06 2021-11-23 Aluminum alloys having silicon, magnesium, copper and zinc

Country Status (7)

Country Link
US (1) US20220081741A1 (ko)
EP (1) EP3980569A4 (ko)
JP (1) JP2022534895A (ko)
KR (1) KR20220006078A (ko)
CN (1) CN113924377A (ko)
CA (1) CA3141154A1 (ko)
WO (1) WO2020247178A1 (ko)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113652619A (zh) * 2021-08-03 2021-11-16 郑州大学 一种低能耗亚共晶高含铜量Al-Si-Cu-Mg铸造合金的热处理强韧化方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016031937A1 (ja) * 2014-08-27 2016-03-03 株式会社神戸製鋼所 成形用アルミニウム合金板

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63169353A (ja) * 1986-12-29 1988-07-13 Furukawa Alum Co Ltd 成形加工用アルミニウム合金およびその製造方法
JPH04131347A (ja) * 1990-09-21 1992-05-06 Nkk Corp プレス成形用高強度アルミニウム合金板及びその製造方法
JPH0931616A (ja) 1995-07-21 1997-02-04 Nippon Steel Corp 成形性に優れたＡｌ−Ｍｇ−Ｓｉ系合金板とその製造方法
DE69620771T3 (de) * 1995-09-19 2006-04-27 Alcan International Ltd., Montreal Verwendung von gewalzten Aluminiumlegierungen für Konstruktionsteile von Fahrzeugen
US6231809B1 (en) * 1998-02-20 2001-05-15 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) Al-Mg-Si aluminum alloy sheet for forming having good surface properties with controlled texture
EP1788103B1 (en) * 1998-09-10 2014-12-31 Kabushiki Kaisha Kobe Seiko Sho Al-Mg-Si based alloy sheet
EP1290235B2 (en) 2000-06-01 2009-10-07 Alcoa Inc. Corrosion resistant 6000 series alloy suitable for aerospace applications
US7494552B2 (en) * 2002-08-20 2009-02-24 Aleris Aluminum Koblenz Gmbh Al-Cu alloy with high toughness
CA2531313C (en) * 2003-07-18 2011-02-15 Corus Aluminium Walzprodukte Gmbh High strength aluminium alloy brazing sheet
US9890443B2 (en) * 2012-07-16 2018-02-13 Arconic Inc. 6XXX aluminum alloys, and methods for producing the same
JP5918209B2 (ja) * 2013-12-25 2016-05-18 株式会社神戸製鋼所 成形用アルミニウム合金板
EP3097216B1 (en) * 2014-01-21 2020-01-15 Arconic Inc. 6xxx aluminum alloys
BR112018010166B1 (pt) * 2015-12-18 2021-12-21 Novelis Inc Liga de alumínio 6xxx, método para produzir uma folha de liga de alumínio, e, folha de liga de alumínio 6xxx
WO2017106654A2 (en) * 2015-12-18 2017-06-22 Novelis Inc. High-strength 6xxx aluminum alloys and methods of making the same

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016031937A1 (ja) * 2014-08-27 2016-03-03 株式会社神戸製鋼所 成形用アルミニウム合金板

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
English Abstract and English Machine Trenslation for Aruga et al. (WO 2016/031937 A1) (March 3, 2016). *

Also Published As

Publication number Publication date
EP3980569A4 (en) 2023-07-05
WO2020247178A1 (en) 2020-12-10
CA3141154A1 (en) 2020-12-10
CN113924377A (zh) 2022-01-11
KR20220006078A (ko) 2022-01-14
JP2022534895A (ja) 2022-08-04
EP3980569A1 (en) 2022-04-13

Similar Documents

Publication Publication Date Title
US9217622B2 (en) 5XXX aluminum alloys and wrought aluminum alloy products made therefrom
JP4964586B2 (ja) 高強度Ａｌ−Ｚｎ合金およびそのような合金製品の製造方法
US9039848B2 (en) Al—Mg—Zn wrought alloy product and method of its manufacture
EP1945825B1 (en) Al-cu-mg alloy suitable for aerospace application
US20050006010A1 (en) Method for producing a high strength Al-Zn-Mg-Cu alloy
JP6771456B2 (ja) アルミニウム合金製品及び調製方法
JP5918158B2 (ja) 室温時効後の特性に優れたアルミニウム合金板
JP7265629B2 (ja) ７ｘｘｘシリーズアルミニウム合金製品
CN109415780A (zh) 6xxx系列铝合金锻造坯料及其制造方法
US20140050936A1 (en) 2xxx series aluminum lithium alloys
WO2019167469A1 (ja) Ａｌ－Ｍｇ－Ｓｉ系アルミニウム合金材
US20230175103A1 (en) New 6xxx aluminum alloys and methods for producing the same
US20220081741A1 (en) Aluminum alloys having silicon, magnesium, copper and zinc
US20210262065A1 (en) 2xxx aluminum alloys
US20170349978A1 (en) Aluminum alloy sheet
US20070151637A1 (en) Al-Cu-Mg ALLOY SUITABLE FOR AEROSPACE APPLICATION
EP3662092A1 (en) Automotive outer panel made from a 6xxx-series aluminium alloy sheet product
JP4175818B2 (ja) 成形性および塗装焼付硬化性に優れたアルミニウム合金板およびその製造方法
WO2017170835A1 (ja) アルミニウム合金板及びアルミニウム合金板の製造方法
JPWO2020148140A5 (ko)
KR102589408B1 (ko) 성형성이 우수한 Al-Mg-Si계 알루미늄 합금판
JPH0734208A (ja) 成形性に優れたアルミニウム合金板の製造方法
JP2004285390A (ja) 高速超塑性成形用Ａｌ−Ｍｇ系アルミニウム合金板
JP2004225114A (ja) 高速超塑性成形用Ａｌ−Ｍｇ系アルミニウム合金板

Legal Events

Date Code Title Description
AS Assignment

Owner name: ARCONIC INC., PENNSYLVANIA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HOSCH, TIMOTHY A;MOOY, DIRK C.;BRYANT, JAMES DANIEL;SIGNING DATES FROM 20190606 TO 20190719;REEL/FRAME:058200/0046

AS Assignment

Owner name: ARCONIC TECHNOLOGIES LLC, PENNSYLVANIA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ARCONIC INC.;REEL/FRAME:058206/0856

Effective date: 20200310

STPP Information on status: patent application and granting procedure in general

Free format text: DOCKETED NEW CASE - READY FOR EXAMINATION

AS Assignment

Owner name: JPMORGAN CHASE BANK, N.A., NEW YORK

Free format text: NOTICE OF GRANT OF SECURITY INTEREST (ABL) IN INTELLECTUAL PROPERTY;ASSIGNOR:ARCONIC TECHNOLOGIES LLC;REEL/FRAME:064641/0798

Effective date: 20230818

Owner name: U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION, NEW YORK

Free format text: NOTICE OF GRANT OF SECURITY INTEREST IN INTELLECTUAL PROPERTY (FIRST LIEN);ASSIGNOR:ARCONIC TECHNOLOGIES LLC;REEL/FRAME:064641/0781

Effective date: 20230818

STPP Information on status: patent application and granting procedure in general

Free format text: NON FINAL ACTION MAILED

STPP Information on status: patent application and granting procedure in general

Free format text: RESPONSE TO NON-FINAL OFFICE ACTION ENTERED AND FORWARDED TO EXAMINER

STPP Information on status: patent application and granting procedure in general

Free format text: NON FINAL ACTION MAILED

STPP Information on status: patent application and granting procedure in general

Free format text: FINAL REJECTION MAILED