Effect of surface roughness on low-cycle fatigue behaviors of 316LN stainless steel in borated and lithiated high-temperature pressurized water
Source abstract
Abstract
Low-cycle fatigue behaviors of 316LN stainless steel with three surface roughness were investigated in high-temperature pressurized water at different strain rates (0.001−0.04%/s) under strain amplitude of 0.3%. More significant reduction of fatigue life was found for samples with higher roughness. The environmental fatigue effects with different surface roughness were strain rate dependent and the weakened effect at low strain rates was related to the plastic deformation layers which enhanced the diffusion of Cr and played an inhibiting role on fatigue crack growth. Besides, the fatigue damage mechanisms for polished and rough samples are discussed.
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Research context
OpenAlex topics: High-Velocity Impact and Material Behavior · Surface Treatment and Residual Stress · Hydrogen embrittlement and corrosion behaviors in metals
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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