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不同能量空间分布激光冲击钛合金残余应力的分布规律

Regularity of Residual Stress Distribution in Titanium Alloys Induced by Laser Shock Peening with Different Energy Spatial Distributions

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摘要

采用不同能量空间分布的激光对TC11钛合金进行了表面处理, 通过X射线测试获得了试件经激光冲击后残余应力的分布规律。结果表明, 在相同的工艺参数下, 高斯分布激光处理的钛合金表面残余应力为-636.71 MPa, 压应力影响层深度为1187 μm;平顶分布激光处理的分别为-559.20 MPa和811 μm。通过理论推算得到高斯分布激光产生的冲击波峰值压力是平顶分布的1.55倍。

Abstract

The surface treatment of TC11 titanium alloys by lasers with different energy spatial distributions is conducted, and the residual stress in specimens induced by laser shock peening (LSP) is tested by X-ray diffraction. The results indicate that, under the same process parameters, the surface residual stress and the stress-affected layer depth in titanium alloys after LSP with a Gaussian distribution are -636.71 MPa and 1187 μm, respectively, while those with a flat-top distribution are -559.20 MPa and 811 μm, respectively. The theoretical calculation shows that the peak stress of shock waves induced by Gaussion spatial energy distributions is 1.55 times of that by flat-top spatial energy distributions.

Newport宣传-MKS新实验室计划
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中图分类号:TN249

DOI:10.3788/lop55.061402

所属栏目:激光器与激光光学

基金项目:国家重点研发计划(2016YFB1102600)、国家重点基础研究发展计划(2015CB057403)

收稿日期:2017-12-01

修改稿日期:2017-12-04

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作者单位    点击查看

李翔:空军工程大学航空航天学院等离子体动力学重点实验室, 陕西 西安 710038
何卫锋:空军工程大学航空航天学院等离子体动力学重点实验室, 陕西 西安 710038
聂祥樊:空军工程大学航空航天学院等离子体动力学重点实验室, 陕西 西安 710038
杨竹芳:空军工程大学航空航天学院等离子体动力学重点实验室, 陕西 西安 710038
罗思海:空军工程大学航空航天学院等离子体动力学重点实验室, 陕西 西安 710038
李一鸣:空军工程大学航空航天学院等离子体动力学重点实验室, 陕西 西安 710038
田乐:空军工程大学航空航天学院等离子体动力学重点实验室, 陕西 西安 710038

联系人作者:聂祥樊(Skingkgd@163.com)

备注:李翔(1993-), 男, 硕士研究生, 主要从事激光表面处理方面的研究。E-mail: 651486396@163.com

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引用该论文

Li Xiang,He Weifeng,Nie Xiangfan,Yang Zhufang,Luo Sihai,Li Yiming,Tian Le. Regularity of Residual Stress Distribution in Titanium Alloys Induced by Laser Shock Peening with Different Energy Spatial Distributions[J]. Laser & Optoelectronics Progress, 2018, 55(6): 061402

李翔,何卫锋,聂祥樊,杨竹芳,罗思海,李一鸣,田乐. 不同能量空间分布激光冲击钛合金残余应力的分布规律[J]. 激光与光电子学进展, 2018, 55(6): 061402

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