Finite element analysis on residual stress field for laser shock processing AM50 magnesium alloy
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1.
School of Materials Science and Engineering, Jiangsu Teachers University of Technology, Changzhou 213001, China;
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2.
School of Mechanical Engineering, Jiangsu Teachers University of Technology, Changzhou 213001, China
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Received Date:
2011-04-07
Accepted Date:
2011-04-27
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Abstract
In order to study the characteristics of the residual stress field in the laser shocked area,the residual stress was studied with finite element analysis method.With a Nd: glass pulse laser shocking the surface of AM50 magnesium alloy in experiments,when the laser power density was about 3GW/cm2,the compressive residual stress on the surface of laser shocked area reached-146MPa,and the depth of the compressive residual stress layer was about 0.8mm.Numerical analysis was done with finite element software ABAQUS.The numerical analysis results showed that when the laser power density was over 0.49GW/cm2,there was compressive residual stress in the shocked area,as the laser power density increased,the residual compressive stress also increased and when the laser power density was between 1.95GW/cm2 and 3.06GW/cm2,the residual compressive stress reached saturation.The results show that the calculation results conforms to the experimental data,the numerical results can be used as theoretical basis for optimizing the process parameters in laser shock processing.
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