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在慢应变速率拉伸过程中通过施加恒电位、循环电位扫描及电位阶跃等不同的电位扰动极化方式，研究了1Cr18Ni9Ti奥氏体不锈钢在0．75mol·L-1HCl＋0．25mol·L-1NaCl溶液中的应力腐蚀开裂敏感性，并利用SEM观察断口形貌.结果表明，电位扫描速度和电位阶跃频率对裂纹萌生与扩展有显著影响.相同电位范围内，高频率电位阶跃比电位扫描导致更高的材料断裂敏感性
In the course of slow strain rate stretching, potentiostatic polarization was applied by potentiostatic potentials, cyclic potential sweeps and potentiometric steps. The effects of 0.75mol·L-1 HCl and 0.25 mol·L-1 NaCl on the mechanical properties of 1Cr18Ni9Ti austenitic stainless steels were studied. And the fracture surface morphology was observed by SEM.The results show that the potential scanning speed and the potential step frequency have a significant effect on the initiation and propagation of the crack.In the same potential range, Leading to higher material fracture sensitivity