We study laser shock peenings of copper single crystals using molecular dynamics simulations based on the ultrafast thermomechanical coupling model. We reveal the effects of ablation coating and confinement layer on response induced by laser shock peening and discuss the potential mechanisms. The results show that the confinement layer significantly enhances the mechanical response of laser shock peening and increases densities of defects caused by laser shock peening, whilst ablation coating has relatively little influence on mechanical response and defect density. Ablation coating inevitably causes the target metal to be contaminated by impurities. Our theoretical study can provide simplifications for improving laser shock peening technology.

我们使用基于超快速热机械耦合模型的分子动力学模拟研究铜单晶的激光冲击喷丸。我们揭示了烧蚀涂层和限制层对激光冲击喷丸引起的响应的影响，并讨论了潜在的机理。结果表明，限制层显着增强了激光冲击喷丸的机械响应并增加了由激光冲击喷丸引起的缺陷的密度，而烧蚀涂层对机械响应和缺陷密度的影响相对较小。烧蚀涂层不可避免地导致目标金属被杂质污染。我们的理论研究可以为改进激光冲击喷丸技术提供简化方法。