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

Patent metadata

Field	Value
Publication number	US-12247271-B2
Application number	US-202418433819-A
Country	US
Kind code	B2
Filing date	Feb 6, 2024
Priority date	Mar 13, 2019
Publication date	Mar 11, 2025
Grant date	Mar 11, 2025

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 1.30 wt. % to 1.50 wt. % Mg;
from 0.25 wt. % to 0.45 wt. % Si;
from 0.01 wt. % to 1.0 wt. % Fe;
from 0.01 wt. % to 0.5 wt. % Cu;
from 0.01 wt. % to 0.5 wt. % Mn;
from 0.005 wt. % to 0.3 wt. % Cr;
from 0.01 wt. % to 0.3 wt. % Ti;
up to 0.4 wt. % Zn;
up to 0.20 wt. % impurities; and remainder Al;
wherein the Mg and Si are present in a ratio of from 5:1 to 2:1 of Mg to Si by weight.

2. 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.

3. 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).

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

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

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

7. 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. %.

8. 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. %.

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

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

11. 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 the alloy of claim 1 .

12. The clad aluminum alloy product of claim 11 , wherein the first clad layer has a thickness of from 0.05 mm to 0.80 mm.

13. The clad aluminum alloy product of claim 11 , wherein the core layer has a thickness of from 0.7 to 2.3 mm.

14. The clad aluminum alloy product of claim 11 , further comprising a second clad layer in contact with the second side of the core layer.

15. The clad aluminum alloy product of claim 11 , 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.

16. The clad aluminum alloy product of claim 11 , 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.

17. The clad aluminum alloy product of claim 11 , 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

• C22F1/047

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

• B32B15/016

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

• Y10T428/12764

  Next to Al-base component · CPC title

• C22C21/08 Primary

  with silicon · CPC title