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Proceedings Paper

Effects of laser shock processing on the fatigue life of 2024-T62 aluminum alloy
Author(s): Hongtao Zhang; Boliang Lu; Shuren Zhang; Yaxin Tang; Chengye Yu
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Paper Abstract

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.

Paper Details

Date Published: 30 September 1996
PDF: 5 pages
Proc. SPIE 2888, Laser Processing of Materials and Industrial Applications, (30 September 1996); doi: 10.1117/12.253158
Show Author Affiliations
Hongtao Zhang, Changchun Institute of Optics and Fine Mechanics (China)
Boliang Lu, Changchun Institute of Optics and Fine Mechanics (China)
Shuren Zhang, Changchun Institute of Optics and Fine Mechanics (China)
Yaxin Tang, Nanjing Univ. of Aeronautics and Astronautics (China)
Chengye Yu, Nanjing Univ. of Aeronautics and Astronautics (China)


Published in SPIE Proceedings Vol. 2888:
Laser Processing of Materials and Industrial Applications
Shu-Sen Deng; S. C. Wang, Editor(s)

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