淬火速率对7136铝合金应力腐蚀开裂敏感性的影响

马志民, 邓运来, 刘佳, 刘胜胆, 刘洪雷

Effect of Quenching Rate on Stress Corrosion Cracking Susceptibility of 7136 Aluminum Alloy

MA Zhimin, DENG Yunlai, LIU Jia, LIU Shengdan, LIU Honglei

图7 在NaCl溶液中不同淬火速率下7136铝合金试样断口附近的SEM像

Fig.7 SEM images near the fracture surface of 7136 aluminum alloy in NaCl solution under quenching rates of 263.0oC/s (a, a1, a2), 5.3oC/s (b, b1, b2), and 1.8oC/s (c, c1, c2) (a-c) low magnification (a1-c1) locally magnified images of box regions in Figs.7a-c, respectively (a2-c2) locally magnified images of box regions in Figs.7a1-c1, respectively (GB—grain boundary, GBP—precipitate at grain boundary, SGB—sub-grain boundary)