焊后热处理对7055-0.1Sc铝合金搅拌摩擦焊接头的组织与力学性能的影响

马俊雅, 张振, 李静静, 王贝贝, 王英君, 薛鹏, 刘峰超, 倪丁瑞, 肖伯律, 马宗义

Effect of Post-Weld Heat Treatment on Microstructures and Mechanical Properties of Friction Stir Welded 7055-0.1Sc Aluminum Alloy

MA Junya, ZHANG Zhen, LI Jingjing, WANG Beibei, WANG Yingjun, XUE Peng, LIU Fengchao, NI Dingrui, XIAO Bolv, MA Zongyi

表3 FSW 7055-0.1Sc-T4的接头热处理前后的拉伸性能

Table 3 Transverse tensile properties of FSW 7055-0.1Sc-T4 joints under AW, AA and T6 states

Number Sample Tensile Strength / MPa Elongation / % Strength coefficient / % 1 500-100-AW 399.9±1.4 8.9±0.5 63.0% 2 500-250-AW 468.5±7.8 6.3±0.5 73.8% 3 500-100-AA 415.8±2.1 4.3±0.4 65.5% 4 500-250-AA 477.6±3.5 3.8±0.4 75.2% 5 500-100-T6 556.5±1.5 Brittle fracture 87.6% 6 500-250-T6 555.0±2.0 Brittle fracture 87.4%