Low density high strength Al-Li alloy
US5198045A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 14, 1991 |
| Grant date | Mar 30, 1993 |
| Priority date | — |
| Expiry date | May 14, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22F1/04
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An aluminum based alloy useful in aircraft and aerospace structures which has low density, high strength and high fracture toughness consists essentially of the following formula: EQU Cu.sub.a Li.sub.b Mg.sub.c Ag.sub.d Zr.sub.e Al.sub.bal wherein a, b, c, d, e and bal indicate the amount in wt. % of alloying components, and wherein 2.4<a<3.5, 1.35<b<1.8, 0.25<c<0.65, 0.25<d<0.65 and 0.08<e<0.25, and the alloy has a density of 0.0945 to 0.0960 lbs/in.sup.3. Preferably, the relationship between the copper and lithium components also meets the following tests: PA0 more preferably the relationship meets the following tests: EQU 6.5<a+2.5b<7.5, 2b-0.8<a<3.75b-1.9.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.