Optimization of multiple laser shock peening on high-cycle fatigue performance of aluminized AISI 321 stainless steel

Wei Li,Huitao Chen,Weiying Huang,Jian Chen,Shuaipeng An,Guoyuan Xiao,Shengde Zhang

International Journal of Fatigue（2021）

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摘要

•Multiple Laser shock peening (LSP) was carried on aluminized 321 stainless steel.•Fatigue lives of aluminized steel increase within LSP times ranging from 0 to 3.•Thermal effect in 4th LSP release compressive residual stress and produce σ phase.•A dramatic degradation in fatigue life is noticed after the 4th LSP cycle.•Potential de-twinning mechanisms during cyclic deformation are also discussed.

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关键词

AISI 321 stainless steel,Aluminizing,Multiple laser shock peening,Cyclic deformation,De-twinning

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