EFFECT OF SUBSTRUCTURE AND RESIDUAL STRESS IN STRENGTHENED LAYER ON FATIGUE STRENGTH OF STAINLESS STEEL OR LOW CARBON STEEL
TAN Yuxu;REN Liping;LI Gang Xi'an Jiaotong University TAN Yuxu; Associate professor; Institute of Metallic Materials and Strength; Xi'an Jiaotong University; 710048 Xi'an
Cite this article:
TAN Yuxu;REN Liping;LI Gang Xi'an Jiaotong University TAN Yuxu; Associate professor; Institute of Metallic Materials and Strength; Xi'an Jiaotong University; 710048 Xi'an. EFFECT OF SUBSTRUCTURE AND RESIDUAL STRESS IN STRENGTHENED LAYER ON FATIGUE STRENGTH OF STAINLESS STEEL OR LOW CARBON STEEL. Acta Metall Sin, 1989, 25(5): 59-64.
Abstract In the strengthened surface layer of stainless steel after shot peening,there are a great amount of deformation microtwins, which may act as structuralstrengthening and prevent the gradual relexation of surface residual stress duringfatigue, so as to keep its rather high level of bending fatigue strength. However,in the strengthened surface layer of low carbon steel, dislocation cell structure isso unstable during fatigue that its surface residual stress relexation cannot be retard-ed. Therefore, the bending fatigue strength of the low carbon steel does not beimproved by shot peening.
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