TAN Yuxu REN Liping LI Gang Xi'an Jiaotong University
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Xi'an
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China TAN Yuxu Associate Professor
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Institute of Metallic Materials and Strength
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Xi'an Jiaotong University
,
Xi'an 710048
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China
金属学报(英文版)
In the strengthened layer of stainless steel after shot peening,there are a great amount of deformation microtwins which may act as structural strengthening factor and prevent the gradual relaxation of surface residual stress during fatigue,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 is so unstalbe during fatigue that its surface residual stress relaxation cannot be retarded.Therefore,the bending fatigue strength of the low carbon steel can not be improred by shot peening.
关键词:
substructure
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