In this work, the effect of laser shock peening (LSP) treatment on fatigue property of aluminized AISI 321 stainless steel was studied. The high fraction twinning and compressive residual stress (CRS) induced by LSP at the severe plastic deformation (SPD) layer were found to be responsible for the enhanced fatigue property. De-twinning was conspicuously noticed in LSP sample. Moreover, the dynamic recovery (DRV) was only noticed at SPD layer during cyclic deformation related to CRS. In sum, the aluminized stainless steel achieved an enhanced fatigue property by LSP treatment.

中文翻译：

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激光冲击强化对渗铝AISI 321不锈钢的高周疲劳性能的影响

在这项工作中，研究了激光冲击强化（LSP）处理对渗铝AISI 321不锈钢疲劳性能的影响。发现在严重塑性变形（SPD）层由LSP引起的高分数孪晶和压缩残余应力（CRS）导致疲劳性能增强。在LSP样本中明显发现了孪生现象。此外，动态恢复（DRV）仅在与CRS有关的循环变形过程中才在SPD层注意到。总之，通过LSP处理，镀铝不锈钢具有增强的疲劳性能。