Effects of laser shock processing on the fatigue life of 2024-T62 aluminium alloy
- Changchun Inst. of Optics and Fine Mechanics (China). Dept. of Mechanical Engineering
- Nanjing Univ. of Aeronautics and Astronautics (China). Dept. of Mechanical Engineering
Laser shock processing (LSP) is a new technology for strengthening the materials. The feasibility of using a high energy, pulsed laser 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 the 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% confidence, the median fatigue life of shocked specimens was 1.9 to 2.5 times than that of unshocked ones. It is expected that LSP will be used as a good treatment for improving the fatigue life of aviation structures.
- OSTI ID:
- 536375
- Report Number(s):
- CONF-9611124-; ISBN 0-8194-2289-4; TRN: IM9745%%214
- Resource Relation:
- Conference: SPIE photonics China `96, Beijing (China), 3-7 Nov 1996; Other Information: PBD: 1996; Related Information: Is Part Of Laser processing of materials and industrial applications; Deng, S.S.; Wang, S.C. [eds.]; PB: 437 p.; Proceedings/SPIE, Volume 2888
- Country of Publication:
- United States
- Language:
- English
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