期刊
OPTICS AND LASER TECHNOLOGY
卷 131, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.optlastec.2020.106409
关键词
Laser shock peening; Molecular dynamics; Ultrafast thermomechanical coupling model; Ablation coating; Confinement layer
资金
- National Science Foundation of China [11972165, 11502085]
- Japan Society for the Promotion of Science (JSPS) [P18067]
- Fundamental Research Funds for the Central Universities [2016YXMS097]
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.
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