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30 September 1996 Effects of laser shock processing on the fatigue life of 2024-T62 aluminum alloy
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Laser shock processing (LSP) is a new technology for strengthening the materials. The feasibility of using a high energy, pulsed beam to shock-harden the localized stress concentration zone, i.e. small holes in 2024-T62 aluminum alloy was investigated in this paper. Confining plasma technique was used in our study. In order to generate the pressure which is required to exceed the dynamic yield strength of 2024-T62 aluminum alloy, laser parameters were optimized. The fatigue life of specimens was studied before and after laser shocking. The fatigue tests showed that the fatigue life of 2024-T62 aluminum alloy treated by LSP had been improved significantly. With 95 percent confidence, the median fatigue life of shocked specimens was 1.9 to 2.5 times that of unshocked ones. It is expected that LSP will e used as a good treatment for improving the fatigue life of aviation structures.
© (1996) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Hongtao Zhang, Boliang Lu, Shuren Zhang, Yaxin Tang, and Chengye Yu "Effects of laser shock processing on the fatigue life of 2024-T62 aluminum alloy", Proc. SPIE 2888, Laser Processing of Materials and Industrial Applications, (30 September 1996); doi: 10.1117/12.253158;


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