【摘要】 激光冲击强化是一种新兴的现代表面处理技术,它利用激光产生的高幅冲击波在冲击区诱导出有益的残余压应力,从而达到强化材料的目的。在分析了激光冲击强化的基本原理和残余应力的形成过程后,探讨了残余应力的计算模型,同时对激光冲击强化后,冲击区表面和深度方向上的残余应力分布特点进行了分析。研究表明在激光冲击强化过程中,存在最佳的冲击波峰值压力;经激光冲击后,金属表面产生很深的残余压应力,且冲击区的残余压应力在表面和深度方向上都基本为均匀分布。更多还原

【Abstract】 Laser shock peening(LSP) is a new surface strengthening technology.It use laser-induced,high-energy shock wave to induce compressive residual stresses on the impacted area of metal.So this treatment can strengthen material.It reviews the basic mechanisms of LSP and the generation of residual stresses.Then the calculated model for residual stresses is discussed and analyzed.Last the characteristics of compressive residual stresses induced by LSP on the surface and in depth are studied.The results indicate that the optimal peak pressure normally produces the best results for a LSP process,and the compressive residual stresses on the impacted area of metal are generally uniform on the surface and in depth.更多还原