Process for producing products of Al-Li-Mg-Cu alloys having high levels of ductility and isotropy
US4652314A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 11, 1985 |
| Grant date | Mar 24, 1987 |
| Priority date | — |
| Expiry date | Mar 11, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22F1/057
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention concerns a process for producing products of Al-base alloys essentially containing Li, Mg and Cu as main alloy elements and having a high level of ductility and isotropy. The process comprises subjecting the homogenized product to a "tepid" transformation operation at from 100.degree. to 420.degree. C. The intermediate annealing operations, if required, are carried out in the range of from 200.degree. to 550.degree. C. The rate of cooling after the intermediate annealing operations is generally kept at from 1500.degree. C./second to 30.degree. C./hour. The isotropy and ductility of the resulting products are considerably improved in comparison with the prior art processes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.