Low-Frequency Corrosion Fatigue Crack Propagation Behavior of 316LN Stainless Steel at Several Temperatures

The effect of ambient temperature on the corrosion fatigue crack propagation rate of 316LN stainless steel under low-frequency load in high-temperature water environment was studied. The results indicate that the high-temperature water environment had a significant accelerating effect on the fatigue crack propagation of 316LN stainless steel. Increasing the temperature led to more significant oxidation of the stainless steel, resulting in an increase in its fatigue crack propagation rate and an increase in the acceleration factor of high-temperature water on fatigue propagation.