Al-Cu-Li-Mg alloys with very high specific mechanical strength
US4840683A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 16, 1988 |
| Grant date | Jun 20, 1989 |
| Priority date | — |
| Expiry date | Feb 16, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22F1/04
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention relates to aluminum based alloys essentially containing Cu, Li and Mg, which have very high specific mechanical strength and can be used particularly to obtain heat treated articles of complex shapes. The analyses are as follows (as % by weight): Cu 2.4 to 3.5%, Li 1.9 to 2.7%; Mg from 0 to 0.8%; and up to: 0.20% Fe; 0.10% Si; 1% Mn; 0.30% Cr; 0.2% Zr; 0.1% Ti 0.02% Be preferably with the following limitation: 4.8.ltoreq.% Cu+% Li+% (Mg/2).ltoreq.6.0. In the treated state the alloys have very high specific mechanical strength (Vickers hardness/density>70), even in the absence of any plastic deformation between quench and temper, thus justifying their use inter alia for components of complex shapes such as cast or stamped parts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.