High strength/ductility magnesium-based alloys for structural applications

Patent metadata

Field	Value
Publication number	US-9593396-B2
Application number	US-74920107-A
Country	US
Kind code	B2
Filing date	May 16, 2007
Priority date	May 18, 2006
Publication date	Mar 14, 2017
Grant date	Mar 14, 2017

Abstract

A tin-containing magnesium-aluminum-manganese (Mg—Al—Mn) based alloy that provides a desired combination of strength and ductility so as to be particularly suited for structural applications. The alloy includes magnesium, aluminum, and manganese in combination and about 0.5% to about 3.5% tin. The tin addition improves strength without substantial loss of ductility.

First claim

What is claimed is:

1. An automotive structural casting consisting essentially of by weight, about 0.8% to about 1.5% tin, not less than 6.5% to about 9% aluminum, about 0.25% to about 0.6% manganese, up to about 0.22% zinc, with the balance being substantially all magnesium with trace amounts of silicon, copper, nickel, iron and other ordinarily present elements wherein the automotive structural casting is an instrument panel beam, a steering system support, or a radiator support.

2. The automotive structural casting of claim 1 , wherein aluminum is present at a level of not less than about 6.8% to about 8%.

3. The automotive structural casting of claim 1 , wherein aluminum is present at a level of about 8% to about 9%.

4. The automotive structural casting of claim 1 , wherein aluminum is present at a level of not less than about 6.8% to about 8%.

5. The automotive structural casting of claim 1 , wherein aluminum is present at a level of about 8% to about 9%.

6. The automotive structural casting of claim 1 , wherein aluminum is present at a level of not less than about 6.8% to about 8%.

7. The automotive structural casting of claim 1 , wherein aluminum is present at a level of about 8% to about 9%.

8. The automotive structural casting of claim 1 , wherein casting is heat treated and has a yield strength of at least 160 MPa.

9. An automotive structural casting consisting essentially of by weight, about 0.8% to about 3.2% tin, not less than 6.5% to about 9% aluminum, about 0.25% to about 0.6% manganese, about 0.03% to about 0.22% zinc, up to about 0.01% silicon, up to about 0.01% copper, up to about 0.002% nickel, and up to about 0.002% iron, with the balance being substantially all magnesium with trace amounts of ordinarily present elements; wherein said trace amounts are no greater than about 0.02% wherein the automotive structural casting is an instrument panel beam, a steering system support, or a radiator support.

10. The automotive structural casting of claim 9 , wherein tin is present at a level of about 0.8% to about 1.5%.

11. The automotive structural casting of claim 10 , wherein aluminum is present at a level of not less than about 6.8% to about 8%.

12. The automotive structural casting of claim 10 , wherein aluminum is present at a level of about 8% to about 9%.

13. The automotive structural casting of claim 9 , wherein tin is present at a level of about 1.6% to about 2.5%.

14. The automotive structural casting of claim 13 , wherein aluminum is present at a level of not less than about 6.8% to about 8%.

15. The automotive structural casting of claim 13 , wherein aluminum is present at a level of about 8% to about 9%.

16. The automotive structural casting of claim 9 , wherein tin is present at a level of about 2.6% to about 3.2%.

17. The automotive structural casting of claim 16 , wherein aluminum is present at a level of not less than about 6.8% to about 8%.

18. The automotive structural casting of claim 16 , wherein aluminum is present at a level of about 8% to about 9%.

Assignees

• Luo Aihua A
• Sachdev Anil K
• Gm Global Tech Operations Llc

Inventors

• Luo Aihua A
• Sachdev Anil K

Classifications

• C22C23/02 Primary

  with aluminium as the next major constituent · CPC title