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激光冲击强化对TC17钛合金残余应力及显微组织的影响

Effect of Laser Shock Peening on Residual Stress and Microstructure of TC17 Titanium Alloy

孙浩   朱颖   郭伟   彭鹏   黄帅  
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摘要

采用不同的工艺参数对TC17钛合金进行了激光冲击强化(LSP)处理,对LSP后TC17钛合金的残余应力分布进行了测试,并用透射电子显微镜观察了显微组织。结果表明,LSP后TC17钛合金表面残余压应力随着冲击次数和冲击能量的增大而增大。LSP使TC17钛合金表面产生了剧烈的塑性变形和高密度位错,且随着激光冲击次数和能量的增大,位错密度也逐渐增大。

Abstract

Laser shock peening (LSP) with different process parameters is applied on TC17 titanium alloy, the distribution of the residual stress of TC17 titanium alloy after LSP is tested, and the microstructure is observed by transmission electron microscopy. The results show that, the surface residual stress of TC17 titanium alloy after LSP increases with the increase of impact number and pulse energy. Severe plastic deformation and high density dislocation are found on TC17 titanium alloy surface after LSP. The density of dislocation increases with the increase of laser impact number and pulse energy.

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中图分类号:TN249

DOI:10.3788/lop54.041405

所属栏目:激光器与激光光学

基金项目:国家国际科技合作专项(2013DFR50590)

收稿日期:2016-11-16

修改稿日期:2016-12-08

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作者单位    点击查看

孙浩:北京航空航天大学机械工程及自动化学院, 北京 100191
朱颖:北京航空航天大学机械工程及自动化学院, 北京 100191
郭伟:北京航空航天大学机械工程及自动化学院, 北京 100191
彭鹏:北京航空航天大学机械工程及自动化学院, 北京 100191
黄帅:北京航空航天大学物理科学与核能工程学院, 北京 100191

联系人作者:孙浩(sunhaoserenade@163.com)

备注:孙浩(1992-),男,硕士研究生,主要从事激光冲击强化方面的研究。

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引用该论文

Sun Hao,Zhu Ying,Guo Wei,Peng Peng,Huang Shuai. Effect of Laser Shock Peening on Residual Stress and Microstructure of TC17 Titanium Alloy[J]. Laser & Optoelectronics Progress, 2017, 54(4): 041405

孙浩,朱颖,郭伟,彭鹏,黄帅. 激光冲击强化对TC17钛合金残余应力及显微组织的影响[J]. 激光与光电子学进展, 2017, 54(4): 041405

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