Effect of laser shock processing on the surface morphology and microstructure of metal material
文献类型：会议论文
| 作者 | Hu XL(胡宪亮)1,2,3; Zhao JB(赵吉宾)1,2 ; Wu JJ(吴嘉俊)1,2,3; Lu Y(陆莹)1,2; Sun BY(孙博宇)1,2; Yang YQ(杨玉奇)1,2,3; Qiao HC(乔红超)1,2
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| 出版日期 | 2020 |
| 会议日期 | October 17-20, 2020 |
| 会议地点 | Shanghai, China |
| 关键词 | laser shock processing surface morphology microstructure aluminum alloy titanium alloy superalloy |
| 页码 | 1-15 |
| 英文摘要 | Laser shock processing (LSP) is a surface hardening technology by using plasma shock waves, which can improve the mechanical properties of material and extend the service life significantly. This work introduced the mechanism of LSP briefly, the analysis of the effect of LSP on the surface morphology, microstructure of material and its related laws are summarized with the aspect from aluminum alloy, titanium alloy and superalloy. The results show that the strong plastic deformation would be appeared in the near-surface of material due to the laser-generated stress effect, resulting the change of surface roughness and the microstructure evolution. At the same time, high-density dislocation walls, dislocation tangles and mechanical twins are generated on the surface, which are accompanied by changes in grain refinement and increased grain boundaries, thereby significantly improve the mechanical properties of material. The convex structure can be found on different material surfaces after LSP, which is micro-scale reverse deformation caused by the free plastic flow of materials under laser shock. And the high pressure of shock waves can lead to destructive dimples on the material surface, and affect its service performance. Aiming at the characteristics of different material, this work comprehensively compares the differences in the surface morphology and microstructure changes of the alloys caused by LSP, and makes a detailed analysis and discussion. This work is helpful for researchers to further understand the high strain rate dynamic plastic deformation mechanism of material treated by LSP, and promote the development of LSP. |
| 产权排序 | 1 |
| 会议录 | 24th National Laser Conference and Fifteenth National Conference on Laser Technology and Optoelectronics
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| 会议录出版者 | SPIE |
| 会议录出版地 | Bellingham, USA |
| 语种 | 英语 |
| ISSN号 | 0277-786X |
| ISBN号 | 978-1-5106-4269-0 |
| WOS记录号 | WOS:000651826800005 |
| 源URL | [http://ir.sia.cn/handle/173321/28146]  |
| 专题 | 工艺装备与智能机器人研究室 |
| 通讯作者 | Hu XL(胡宪亮); Qiao HC(乔红超) |
| 作者单位 | 1.Institutes for Robotics and Intelligent Manufacturing, Chinese Academy of Sciences, Shenyang, Liaoning 110169, China 2.State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang, Liaoning 110016, China 3.University of Chinese Academy of Sciences, Beijing 100049, China |
| 推荐引用方式 GB/T 7714 | Hu XL,Zhao JB,Wu JJ,et al. Effect of laser shock processing on the surface morphology and microstructure of metal material[C]. 见:. Shanghai, China. October 17-20, 2020. |
入库方式： OAI收割
来源：沈阳自动化研究所
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