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Rolling contact fatigue and damage characteristic of AISI 9310 steel with pre-laser shock peening treatment
International Journal of Fatigue ( IF 6 ) Pub Date : 2021-10-08 , DOI: 10.1016/j.ijfatigue.2021.106588
Jingdong Song 1 , Sihai Luo 2 , Xiaoqing Liang 2 , Zhenyang Cao 1 , Wang Zhao 1 , Changgeng Pu 1 , Weifeng He 1, 2
Affiliation  

Contact fatigue is one of the most common failure modes for gear tooth, which is closely associated with the material surface state. In this paper, the specimens with and without pre-LSP treatment were subjected to rolling contact fatigue (RCF). The surface damage morphology/ characteristics and fracture morphology were characterized. The results showed that RCF life was improved from 5.37 × 105 to 9.04 × 105 cycles after LSP treatment. The main reasons are the effect of the work hardening and compressive residual stress induced by LSP. A smaller Kernel Average Misorientation value with pre-LSP treatment at subsurface after RCF, resulting in the increase of plastic deformation resistance and RCF life.



中文翻译:

AISI 9310钢预激光冲击强化处理的滚动接触疲劳和损伤特性

接触疲劳是齿轮最常见的失效模式之一,与材料表面状态密切相关。在本文中,经过和未经预 LSP 处理的试样均经受滚动接触疲劳 (RCF)。表征了表面损伤形态/特征和断裂形态。结果表明,经过LSP处理后,RCF寿命从5.37×10 5周期提高到9.04×10 5个周期。主要原因是LSP引起的加工硬化和压缩残余应力的影响。在 RCF 后在次表面进行预 LSP 处理的内核平均取向误差值较小,导致塑性变形抗力和 RCF 寿命增加。

更新日期:2021-10-12
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