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金属学报  1992 

残余应力和表面形态对60Mn疲劳性能的影响

, PP. 40-46

Keywords: 喷丸,疲劳极限,残余应力,表面形态

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Abstract:

喷丸产生的表层残余压应力使中温回火弹簧钢60Mn的疲劳极限从930提高到1010MPa,而心部的高残余拉应力又会使疲劳极限从1010降至940MPa,严重的喷丸表面损伤可以使疲劳极限从1010降至800MPa。裂纹在计入残余应力的Mises等效应力超过材料局部强度的部位萌生。喷丸产生的残余压应力可以增强裂纹闭合效应,从而降低裂纹扩展率。

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