New retrogression and reaging process for high strength and high stress corrosion resistance 7050 aluminum alloys

摘要

New retrogression and reaging process for 7050 aluminum alloys, having the yield strength of 600MPa and stress corrosion resistance equal to 7050-T74, has been developed. New Process is combined higher aging and reaging temperature and lower reversion temperature. These treatments brought out wider spacing in grain boundary precipitates (η phase) and denser GP zones and η 'phase precipitation to improve the properties as mentioned above.