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Optical Engineering

Experimental and numerical simulation research on laser shock forming of thin metal sheet of brass
Author(s): Feiyu Wang; Zhenqiang Yao; Xueping Zhang
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Paper Abstract

Laser shock forming (LSF) of sheet metal is a new technique realized by applying an impulsive pressure generated by a laser-induced shock wave on the surface of metal sheet. Our objective is to examine the deformation and the surface quality of LSF. LSF of a brass metal sheet is investigated using a Q-switched Nd:YAG laser with an energy per pulse of 15 to 50 J. The microhardness, roughness, and microstructure of the processed brass specimen are examined. ABAQUS software is employed to simulate the LSF process. The central displacement of the shocked region is measured and compared with the simulation. The results reveal that the microhardness of the brass specimen increases by about 20% because of the LSP treatment, and the surface quality and the microstructure has no visible change: LSF is a mechanical process, not a thermal process, and no remarkable ablation is observed. The higher the pulse energy, the higher is the central displacement of the shocked region obtained. The deformation of the simulation matches the experiment quite well.

Paper Details

Date Published: 1 February 2008
PDF: 6 pages
Opt. Eng. 47(2) 024302 doi: 10.1117/1.2844699
Published in: Optical Engineering Volume 47, Issue 2
Show Author Affiliations
Feiyu Wang, Shanghai Jiaotong Univ. (China)
Zhenqiang Yao, Shanghai Jiao Tong Univ. (China)
Xueping Zhang, Shanghai Jiao Tong Univ. (China)

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