Pages 303-304
This study was carried out to improve the fatigue strength of steel with many surface modifications. Wide Peaning Cleaning (WPC) process was developed recently. Three factors of high hardness, high compressive residual stress and deterioration of suface roughness are added on surface layer with WPC process, and it is said that these factors will define the fatigue strength. We estimated quantitately the effect upon the fatigue strength by these factors. Furthemore we presumed and verified the presence of the maximum size of dent that influences the fatigue strength. The analysis resuts were almost accordance with the experimental result and it is shown that the prediction of fatigue strength of the steel modified with WPC process.
