Al-Cu-Li-Mg-Ag-Mn-Zr alloy for use as structural members requiring high strength and high fracture toughness
US7229509B2 · kind B2 · utility
30Cited by
3References
16Claims
0Family size
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Inventor
Key dates
| Filing date | May 26, 2004 |
| Grant date | Jun 12, 2007 |
| Priority date | — |
| Expiry date | May 26, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C21/16
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An improved aluminum lithium alloy comprising 0.1 to 2.5 wt. % Li, 2.5 to 5.5 wt. % Cu, 0.2 to 1.0 wt. % Mg, 0.2 to 0.8 wt. % Ag, 0.2 to 0.8 wt. % Mn, up to 0.4 wt. % Zr or other grain refiner such as chromium, titanium, hafnium, scandium or vanadium, the balance aluminum. The present alloy exhibits an improved combination of strength and fracture toughness, over any thickness range. The present invention is further directed to methods for preparing and using Al—Li alloys as well as to products comprising the same.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.