蠕变时效对欠时效7075铝合金力学性能的影响

高川, 邓运来, 王冯权, 郭晓斌

Effect of Creep Aging on Mechanical Properties of Under-Aged 7075 Aluminum Alloy

GAO Chuan, DENG Yunlai, WANG Fengquan, GUO Xiaobin

表1 蠕变时效与人工时效在不同时间下的析出相统计情况

Table 1 Statistics of precipitates in creep aging and artificial aging at different time

Sample Number density of precipitated phase Volume fraction η′ radius 1022 mm-3 % nm UA + CA/260 MPa-2 h 1.50 ± 0.04 0.22 ± 0.07 3.04 ± 0.12 UA + CA/260 MPa-6 h 1.13 ± 0.03 0.46 ± 0.05 4.27 ± 0.21 UA + CA/260 MPa-10 h 0.93 ± 0.05 0.39 ± 0.08 4.32 ± 0.36 UA + AA/8 h 1.12 ± 0.03 0.46 ± 0.08 4.29 ± 0.28