By inducing work hardening and beneficial compressive residual stresses in near-surface regions, laser shock peening (LSP) improves the fatigue performance of many metallic components. In recent years, LSP has found many new applications in emerging fields: additive manufacturing, ceramics, and metallic glasses. In addition, innovative process development based on LSP has been reported, which includes warm LSP, cryogenic LSP, electropulsing-assisted LSP, laser peening without coating, femotosecond LSP, and laser peen forming. Herein, a comprehensive review of the LSP process with a focus on the novel applications and innovative process development is aimed for. The history of LSP with key events is briefly reviewed. The fundamental mechanisms of LSP, including the generation of shockwaves by a high-energy pulsed laser, the generation of compressive residual stresses by the shockwave, and its effect on crack propagation, and how LSP induces grain refinement are also discussed. The effects of compressive residual stresses and grain refinement on the mechanical properties of metallic materials are reviewed. Recent developments in LSP, such as innovative process development based on LSP and its novel applications, are discussed. Finally, the current challenges the LSP technology faces and its future directions are also discussed.

中文翻译：

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激光冲击强化的最新发展和新应用：综述

通过在近表面区域引起加工硬化和有益的压缩残余应力，激光冲击强化 (LSP) 提高了许多金属部件的疲劳性能。近年来，LSP 在新兴领域发现了许多新应用：增材制造、陶瓷和金属玻璃。此外，还报道了基于 LSP 的创新工艺开发，包括温 LSP、低温 LSP、电脉冲辅助 LSP、无涂层激光喷丸、飞秒 LSP 和激光喷丸成形。在此，旨在对 LSP 工艺进行全面审查，重点关注新应用和创新工艺开发。简要回顾了具有关键事件的 LSP 的历史。LSP 的基本机制，包括高能脉冲激光产生冲击波，还讨论了冲击波对残余压缩应力的产生及其对裂纹扩展的影响，以及 LSP 如何引起晶粒细化。综述了压缩残余应力和晶粒细化对金属材料力学性能的影响。讨论了 LSP 的最新发展，例如基于 LSP 的创新工艺开发及其新应用。最后，还讨论了 LSP 技术目前面临的挑战及其未来发展方向。例如，讨论了基于 LSP 的创新工艺开发及其新应用。最后，还讨论了 LSP 技术目前面临的挑战及其未来发展方向。例如，讨论了基于 LSP 的创新工艺开发及其新应用。最后，还讨论了 LSP 技术目前面临的挑战及其未来发展方向。