US20190024220A1 - Aluminum-based alloy - Google Patents

Aluminum-based alloy Download PDF

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Publication number
US20190024220A1
US20190024220A1 US16/070,725 US201716070725A US2019024220A1 US 20190024220 A1 US20190024220 A1 US 20190024220A1 US 201716070725 A US201716070725 A US 201716070725A US 2019024220 A1 US2019024220 A1 US 2019024220A1
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US
United States
Prior art keywords
aluminum
based alloy
modulus
young
heat treatment
Prior art date
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Abandoned
Application number
US16/070,725
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English (en)
Inventor
Hiroyuki Watanabe
Shoichi Hirosawa
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.)
Honda Motor Co Ltd
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Honda Motor Co Ltd
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Filing date
Publication date
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Assigned to HONDA MOTOR CO., LTD. reassignment HONDA MOTOR CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HIROSAWA, Shoichi, WATANABE, HIROYUKI
Publication of US20190024220A1 publication Critical patent/US20190024220A1/en
Abandoned legal-status Critical Current

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    • 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
    • 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
    • C22C21/18—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
    • C22F1/04—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
    • 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

  • the present invention relates to an aluminum-based alloy in which one or more special additive elements are solid-solved in an aluminum parent phase so as to impart a high Young's modulus.
  • an object of the present invention is to provide an aluminum-based alloy which can have high stiffness without containing hard particles such as those of ceramics, which can be produced easily, and which is easily processed by machine processing.
  • the inventors have researched strengthening by solid solution and aging in order to improve Young's modulus of aluminum-based alloys. As a result of calculation, they found that stiffness can be increased by substituting Al with an element having smaller atomic radius than Al. That is, by adding the additive element, electron density is improved and distance between atoms (distance between lattices) is smaller, bonding energy is increased, and therefore, stiffness can be increased.
  • atomic radius of Cu, Zn, Ag, and Li is ⁇ 10.5%, ⁇ 6.99%, +1.05% and +5.70% of atomic radius of Al, respectively.
  • the inventors have calculated Young's modulus of aluminum-based alloy in a case in which 25 atom % of the additive element is contained in Al, with respect to elements from the first row to the fifth row in the periodic table.
  • the following formula 1 is used as the theoretical formula.
  • E is Young's modulus
  • r is distance between atoms in a crystal lattice (face centered cubic)
  • A, n, and in are constants, depending on element.
  • Young's modulus was calculated by the formula 1 using analytical software (CASTEP, super cell model). It should be noted that settings of the analytical software are approximations of the general density gradient, 350 eV of energy cut off, and 6 ⁇ 6 ⁇ 6 of K point set.
  • Young's modulus of each of the aluminum-based alloys was calculated, and these alloys were compared to the Young's modulus of pure aluminum, and increase rate of Young's modulus was calculated in a condition in which added amount of additive element in each aluminum-based alloy is converted to 1 wt %.
  • the increase rate of Young's modulus of Cu, Zn, Ag, and Li is respectively 0.65%, 0.04%, 0.24%, and 0.95%.
  • the inventors have understood that if there is oversaturation of an additive element solid-solved in Al, even higher stiffness can be exhibited by depositing an intermediate layer (intermetallic compound of Al and additive element, intermetallic compound of additive elements or the like) due to difference between the oversaturated solid-solution and solid solubility limit at aging temperature, and they have researched elements from the first row to the fifth row in the periodic table. As a result, they have found that the maximum solid solubility amount of Cu, Zn, Ag and Li in Al is respectively 2.48 wt %, 49.1 wt %, 23.9 wt %, and 13.9 wt %.
  • the product of both was calculated. Then, the products were Cu 1.612, Zn 1.964, Ag 5.736, Li 13.205, and the other elements less than 1.
  • the present invention was completed in view of the above findings, and the first aspect of the present invention is an aluminum-based alloy containing aluminum as a main element and is shown by the following general formula (1), wherein X and Y are respectively selected from Cu, Zn, Ag and Li, and a and b are values in mass % in which a solid solution is possible by solution heat treatment in this range.
  • the second aspect of the present invention is an aluminum-based alloy containing aluminum as a main element and is shown by the following general formula (2), wherein X, Y, Z, and W are respectively selected from Cu, Zn, Ag, and Li, and a, b, c, and d are values in mass % in which a solid solution is possible by solution heat treatment in this range.
  • the solution heat treatment is a treatment in which secondary phase particles or the like generated by a concentration gradient in a solid phase are solid solved by heat treatment.
  • additive elements are solid solved by increasing temperature until monophasic domain in an equilibrium diagram and then rapidly cooling. Therefore, a “range in which solid solution is possible by solution heat treatment” means a range in which a monophasic solid phase ( ⁇ phase) exists in an equilibrium diagram, and its upper limit is the content amount of additive elements of which the solid phase only exists in two phases ( ⁇ phase+ ⁇ phase).
  • a, b, c, and d in the general formulas (1) and (2) be positive numbers satisfying the relationship 14 ⁇ (a+b+c+d) ⁇ 30.
  • a method for production of aluminum-based alloy of the present invention is characterized in that solution heat treatment and quenching of the above-mentioned aluminum-based alloy are performed, and this is aged at 90 to 170 ° C. for 120 to 240 hours.
  • an aluminum-based alloy due to forming effects of the solid solution and the intermediate phase of the additive elements added to the aluminum parent phase, an aluminum-based alloy can be provided, in which the Young's modulus and stiffness are greatly improved. Therefore, by the present invention, due to high stiffness, for example, weight can be reduced by reducing thickness of parts that are influenced by stiffness, such as a braking caliper, and compact shape design can be realized by reducing thickness of parts.
  • FIG. 1 is a perspective view showing a measuring apparatus for Young's modulus.
  • FIG. 2 is a graph showing a relationship between aging time and Young's modulus of the aluminum-based alloy in an Example of the present invention.
  • Rectangular samples having a width of 10 mm, length of 60 mm, and thickness of 1.5 mm were prepared from the aluminum-based alloy having composition shown in Table 1.
  • the samples were processed by solution heat treatment in which samples were held at 520° C. for 4 hours and then quenched in water, and they were processed by aging at 110° C. for 24 hours. Then, Young's modulus of the samples was measured multiple times, and each of maximum values among multiple measurements are shown in Table 1.
  • FIG. 1 shows an apparatus for measuring Young's modulus (trade name: JE-RT, produced by Nihon Techno-Plus Co. Ltd.).
  • a sample TP is suspended by two hanging wires 1
  • a driving electrode 2 generates natural vibration by constructing a condenser at a gap between the driving electrode 2 and the sample TP
  • the vibration is detected by a non-contacting vibration sensor 3
  • Young's modulus is calculated.
  • This measuring method is regulated and understood under Japanese Industrial Standard Z 2280.
  • Examples 1 to 5 exhibit higher Young's modulus than that of the reference material made of pure aluminum.
  • Example 5 containing Cu, Zn, Ag and Li, extremely high Young's modulus was obtained.
  • the Young's modulus calculated with the formula 1 was extremely close to the actual measured value thereof, and thus, the desirability of selecting Cu, Zn, Ag, and Li was confirmed.
  • Samples of aluminum-based alloy were prepared in a condition similar to that of the First Examples, except that composition and aging treatment conditions were as shown in FIG. 2 .
  • aging temperature was 170° C.
  • Young's modulus of not less than 77 GPa was obtained by aging for 240 hours.
  • Young's modulus of not less than 78 GPa was obtained by aging for 1500 hours.

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  • 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)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Powder Metallurgy (AREA)
US16/070,725 2016-01-22 2017-01-20 Aluminum-based alloy Abandoned US20190024220A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2016010567A JP6784962B2 (ja) 2016-01-22 2016-01-22 アルミニウム基合金
JP2016-010567 2016-01-22
PCT/JP2017/001917 WO2017126650A1 (ja) 2016-01-22 2017-01-20 アルミニウム基合金

Publications (1)

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US20190024220A1 true US20190024220A1 (en) 2019-01-24

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US (1) US20190024220A1 (zh)
JP (1) JP6784962B2 (zh)
CN (1) CN108699636A (zh)
WO (1) WO2017126650A1 (zh)

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6562154B1 (en) * 2000-06-12 2003-05-13 Aloca Inc. Aluminum sheet products having improved fatigue crack growth resistance and methods of making same
BRPI0820679A2 (pt) * 2007-12-04 2019-09-10 Alcoa Inc ligas alumínio-cobre-lítio melhoradas
CN101533911B (zh) * 2009-04-08 2011-06-22 西安交通大学 铝基三元合金作为锂离子电池负极材料的应用
CA2771585C (en) * 2009-09-04 2015-11-24 Alcoa Inc. Methods of aging aluminum alloys to achieve improved ballistics performance
MX344421B (es) * 2010-09-08 2016-12-15 Alcoa Inc * Aleaciones mejoradas de aluminio 7xxx y metodos para producir las mismas.
CN102011030A (zh) * 2010-09-27 2011-04-13 中国计量学院 一种用于制氢的铝合金成分设计及制备方法
CN102021457B (zh) * 2010-10-27 2012-06-27 中国航空工业集团公司北京航空材料研究院 一种高强韧铝锂合金及其制备方法
CN101967589B (zh) * 2010-10-27 2013-02-20 中国航空工业集团公司北京航空材料研究院 一种中强高韧铝锂合金及其制备方法
EP2789706B1 (en) * 2013-04-11 2015-07-15 Aleris Rolled Products Germany GmbH Method of casting lithium containing aluminium alloys
JP6344816B2 (ja) * 2013-08-30 2018-06-20 株式会社Uacj 高強度アルミニウム合金押出薄肉形材およびその製造方法
CN103540876B (zh) * 2013-09-30 2015-09-16 中国航空工业集团公司北京航空材料研究院 一种Al-Cu-Li-X系铝锂合金薄板的制备方法
CN104060130A (zh) * 2014-07-01 2014-09-24 张家港市佳晟机械有限公司 一种航空用锂铝合金

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JP6784962B2 (ja) 2020-11-18
CN108699636A (zh) 2018-10-23
WO2017126650A1 (ja) 2017-07-27
JP2017128780A (ja) 2017-07-27

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