High strength aluminum alloy resistant to exfoliation and method of making
US4954188A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 7, 1988 |
| Grant date | Sep 4, 1990 |
| Priority date | — |
| Expiry date | Dec 7, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C21/10
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method is provided for producing a high strength aluminum alloy characterized by improved resistance to exfoliation. The method comprises providing an aluminum-base alloy comprising 5.9 to 8.2 wt. % zinc, 1.5 to 4.0 wt. % magnesium, 1.5 to 3.0 wt. % copper, less than 0.001 wt. % boron not more than 0.04 wt. % chromium, and 0.5 wt. % maximum other alloying elements such as zirconium, manganese, iron, silicon and titanium, with the balance consisting of aluminum, working the alloy into a product of predetermined shape, solution heat treating the shaped product, quenching, and aging the heat treated and quenched product to a temperature of from above 270.degree. F. to 285.degree. F. for a period of from 6 to 30 hours.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.