激光技术2016，Vol.40Issue(1)：5-10,6.DOI:10.7510/jgjs.issn.1001-3806.2016.01.002
激光冲击强化AZ31镁合金表面残余应力分析
Analysis of residual stress on surface of AZ31 magnesium alloy after laser shock processing
摘要
Abstract
To obtain maximum surface residual compressive stress by optimizing technological parameters of laser shock , the formula of residual compressive stress on the surface of AZ 31 magnesium after laser shock process (LSP) was deduced from the theory of laser shock process and plastic deformation .Residual stress fields of AZ 31 magnesium by LSP was simulated with ABAQUS software.Finite element analysis shows that laser shock wave pressure of optimal residual compressive stress field ranges from 1.2GPa to 1.7GPa.With the increase of load, residual stress on the surface of AZ31 magnesium increases.The maximum residual compressive stress is about 125MPa with loading range from 1.4GPa to 1.6GPa.There is a slight residual stresses hole phenomenon impact when load is 1.8GPa and a significant residual stresses hole phenomenon when load is more than 1.9GPa.When the load is 1.474GPa, the maximum residual stress is -128.5MPa.Experimental results are consistent with finite element analysis .关键词
激光技术/镁合金/残余应力/塑性变形/有限元分析Key words
laser technique/magnesium alloy/residual compressive stress/plastic deformation/finite element分类
信息技术与安全科学引用本文复制引用
李兴成,张永康,周金宇,陈菊芳,卢雅琳..激光冲击强化AZ31镁合金表面残余应力分析[J].激光技术,2016,40(1):5-10,6.基金项目
国家自然科学基金资助项目(51275221) （51275221）
