Corrosion fatigue (CF) behavior of 316LN stainless steel under different strain amplitudes (0.3–0.8%) in 325 °C water was investigated at a strain rate of 0.04% s⁻¹. It was found that the fatigue life and strain amplitude has a linear relation in double logarithmic coordinate. The environmental damage increased with decreasing strain amplitudes. The synergistic effect of mechanical and environmental damages during the CF process in high-temperature pressurized water is discussed, and a calculation equation for environmental fatigue correction factor F_en is proposed to calculate the strain amplitude effect.

中文翻译：

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高温加压水中不同疲劳应变幅度下316LN不锈钢的机械和环境损伤的协同效应

研究了316LN不锈钢在325°C水中在不同应变幅度（0.3–0.8％）下的腐蚀疲劳（CF）行为，应变速率为0.04％s ^-1。结果表明，疲劳寿命与应变幅值在双对数坐标下呈线性关系。环境损害随着应变幅度的减小而增加。讨论了高温高压水中CF过程中机械和环境破坏的协同效应，并提出了环境疲劳校正因子F _en的计算公式，以计算应变振幅效应。