关键词: 铝锂合金, 强度, 韧性, 预变形

Abstract:

The influence of the preformation before the ageing on strength and tenacity of Al Li alloys is studied, and the reason is analyzed for the increase in punch parts strength and tenacity as the result of the preformation before the ageing. The result showed that the optimum preformation of Al Li alloys 2090 before the ageing is 5%～10%,and for Al Li alloys 8090 of Mg/Cu=0.4 the optimum preformation is 6%～8%, and for Al Li alloys 8090 of Mg/Cu=0.8 2%～6%.

Key words: aluminum lithiun alloys, strength, tenacity, preformation