A comprehensive review of fatigue behavior of laser shock peened metallic materials

Laser shock peening (LSP) is widely used in manufacturing industry due to its contribution to the improvement of mechanical performance for metallic components. In practical applications, LSP processing that introduce compressive residual stress and finer grain in surface and subsurface, which affected the fatigue behaviors of metallic materials. Appropriate design of the processing parameters can significantly improve the fatigue per-formance. The fatigue of peened metallic materials is thus a topic of research and practical interest. In this re-view, a brief introduction on LSP and its applications is first provided. Then experimental studies on fatigue behaviors of LSP metallic materials are summarized with an emphasis on the effects of residual stress and microstructure on the fatigue improvements and fatigue failure mechanisms. Finally, recent progress in simu-lation studies on fatigue and fracture of LSP metallic materials is presented. The knowledge derived from this paper will provide insights and guidance to the applications of LSP.

Automated summary

Laser shock peening (LSP) is widely used in the manufacturing industry to improve the mechanical performance of metallic components by introducing compressive residual stress and finer grain. Proper design of processing parameters can greatly enhance fatigue performance. Studies have shown that residual stress and microstructure play crucial roles in fatigue improvement and failure mechanisms of peened metallic materials.