Age-hardenable and highly formable aluminum alloys and methods of making the same

Patent metadata

Field	Value
Publication number	US-2024175109-A1
Application number	US-202418433819-A
Country	US
Kind code	A1
Filing date	Feb 6, 2024
Priority date	Mar 13, 2019
Publication date	May 30, 2024
Grant date	—

Abstract

Provided herein are new aluminum alloy products and methods of making these alloys. The aluminum alloy products are age-hardenable, display high strength and formability, and allow for the use of recycled scrap. The aluminum alloys can serve as the core in a clad aluminum alloy product. The alloy products can be used in a variety of applications, including automotive, transportation, and electronics applications.

First claim

What is claimed is:

1 . An aluminum alloy, comprising:
from 0.5 wt. % to 1.6 wt. % Mg; from 0.2 wt. % to 0.5 wt. % Si; up to 1.0 wt. % Fe; up to 0.5 wt. % Cu; up to 0.5 wt. % Mn; up to 0.3 wt. % Cr; up to 0.3 wt. % Ti; up to 0.5 wt. % Zn; up to 0.25 wt. % impurities; and Al.

2 . The aluminum alloy of claim 1 , wherein:
the amount of Mg is from 0.6 wt. % to 1.5 wt. %; the amount of Si is from 0.3 wt. % to 0.45 wt. %; the amount of Fe is up to 0.5 wt. %; the amount of Cu is up to 0.4 wt. %; the amount of Mn is up to 0.4 wt. %; the amount of Cr is up to 0.25 wt. %; the amount of Ti is up to 0.15 wt. %; the amount of Zn is up to 0.4 wt. %; and the amount of impurities is up to 0.20 wt. %.

3 . The aluminum alloy of claim 1 , wherein the Mg and Si are present in a ratio of from 5:1 to 2:1 of Mg to Si by weight.

4 . The aluminum alloy of claim 1 , wherein the Mg and Si are present in a ratio of from 4:1 to 2:1 of Mg to Si by weight.

5 . The aluminum alloy of claim 1 , wherein:
the amount of Mg is from 0.7 wt. % to 1.5 wt. %; the amount of Si is from 0.25 wt. % to 0.45 wt. %; the amount of Fe is from 0.01 wt. % to 1.0 wt. %; the amount of Cu is from 0.01 wt. % to 0.5 wt. %; the amount of Mn is from 0.01 wt. % to 0.5 wt. %; the amount of Cr is from 0.005 wt. % to 0.3 wt. %; the amount of Ti is from 0.01 wt. % to 0.25 wt. %; the amount of Zn is up to 0.4 wt. %; and the amount of impurities is up to 0.20 wt. %.

6 . The aluminum alloy of claim 1 , wherein the aluminum alloy, when in a T8x temper, has a yield strength (Rp0.2) of from 160 MPa to 230 MPa when tested according to ISO 6892-1 (2016).

7 . The aluminum alloy of claim 1 , wherein the aluminum alloy has a bake hardening value from 70 MPa to 140 MPa.

8 . The aluminum alloy of claim 1 , comprising at least 40 wt. % recycled content.

9 . The aluminum alloy of claim 1 , comprising at least 40 wt. % UBC.

10 . The aluminum alloy of claim 1 , wherein the combined concentration of Fe, Mn and Cu in the aluminum alloy is at least 0.7 wt. %.

11 . The aluminum alloy of claim 1 , wherein the combined concentration of Fe, Mn, and Cu in the aluminum alloy is between 0.7 wt. % and 3.0 wt. %.

12 . The aluminum alloy of claim 1 , wherein the aluminum alloy is a core layer in a clad product.

13 . A monolithic sheet, comprising the aluminum alloy of claim 1 .

14 . A clad aluminum alloy product, comprising:
a core layer having a first side and a second side; and a first clad layer in contact with the first side of the core layer; wherein the core layer comprises from 0.5 wt. % to 1.6 wt. % Mg and from 0.2 wt. % to 0.5 wt. % Si.

15 . The clad aluminum alloy product of claim 14 , wherein the first clad layer has a thickness of from 0.05 mm to 0.80 mm.

16 . The clad aluminum alloy product of claim 14 , wherein the core layer has a thickness of from 0.7 to 2.3 mm.

17 . The clad aluminum alloy product of claim 14 , further comprising a second clad layer in contact with the second side of the core layer.

18 . The clad aluminum alloy product of claim 14 , wherein the first clad layer comprises an 1xxx series aluminum alloy, 2xxx series aluminum alloy, a 3xxx series aluminum alloy, a 4xxx series alloy, a 5xxx series aluminum alloy, a 6xxx series aluminum alloy, a 7xxx series aluminum alloy, or an 8xxx series aluminum alloy.

19 . The clad aluminum alloy product of claim 14 , wherein the clad aluminum alloy product when in a T8x temper has a yield strength of at least 150 MPa and when in a T4 temper has a total elongation above 20% in all directions.

20 . The clad aluminum alloy product of claim 14 , wherein the clad aluminum alloy product is a sheet, a plate, an electronic device housing, an automotive structural part, an aerospace structural part, an aerospace non-structural part, a marine structural part, or a marine non-structural part.

Assignees

• Novelis Inc

Inventors

• Mariaux Aurèle
• Despois Aude Celine
• Felberbaum Milan
• Florey Guillaume

Classifications

• C22C21/08 Primary

  with silicon · CPC title

• B32B15/016

  all layers being formed of aluminium or aluminium alloys · CPC title

• C22F1/047

  of alloys with magnesium as the next major constituent · CPC title

• Y10T428/12764

  Next to Al-base component · CPC title