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陈隆庆 , 陈箐
金属学报
本文在对轴承钢接触疲劳剥落过程进行连续追踪观测的基础上,推导了次表面裂纹扩展的估算公式。理论分析和试验结果表明,接触疲劳寿命与次表面裂纹扩展角之间存在着明显的对应关系。并对残余压应力和残余奥氏体可以提高接触疲劳寿命的原因提出了新的解释。
关键词: 接触疲劳寿命 , fatigue life , crack propagating angle , residual stress
CHEN Longqing Zhengzhou Institute of Technology , Zhengzhou , China CHEN Qing Luoyang Institute of Technology , Luoyang , China
金属学报(英文版)
Based on the sequent tracking observation on spalling of steel GCr15 under rolling contact fa- tigue,an expression for estimating the propagation of subsurface cracks was derived.The rol- ling contact fatigue life was found to be markedly related to the subsurface crack propagation angle.A new explanation of reason why the rolling contact fatigue life can be prolonged by residual compressive stress and retained austenite was advanced.
关键词: contact fatigue , null , null , null , null
