Combined cyclic tension and internal pressure tests with various proportions of each loading were run on a 2.5%Cr–1%Mo steel in air and in 3.5% NaCl solution, with and without cathodic protection to investigate the effect of positive stress biaxiality on corrosion‐fatigue lives and damage mechanisms. At free potential, a strong reduction in fatigue resistance was observed for uniaxial as well as for equibiaxial cyclic tension and attributed to multiple crack initiation from corrosion pits. Cathodic protection completely cancelled the detrimental effect of the corrosive environment on fatigue lives whatever the load biaxiality was, in spite of an obvious enhancement of intergranular fracture attributed to hydrogen embrittlement.

中文翻译：

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Cr-Mo钢在双轴拉伸下的腐蚀疲劳行为

在2.5％Cr-1％Mo钢的空气中和3.5％NaCl溶液中，在有或没有阴极保护的情况下，对每种载荷的不同比例进行了循环拉伸和内压组合测试，以研究正应力双轴性对腐蚀的影响-疲劳寿命和损坏机理。在自由电势下，观察到单轴以及等双轴循环张力的疲劳强度大大降低，这归因于腐蚀坑引发的多次裂纹。阴极保护完全消除了腐蚀环境对疲劳寿命的不利影响，无论负载双轴性如何，尽管氢脆化引起的晶间断裂明显增加。