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TECHNICAL PAPERS

Effect of Laser Shock Processing (LSP) on the Fatigue Resistance of an Aluminum Alloy

[+] Author and Article Information
Tang Yaxin, Zhang Yongkang, Zhang Hong, Yu Chengye

Department of Mechanical Engineering, Nanjing University of Aeronautics & Astronautics, Nanjing, 210016, P.R. China

J. Eng. Mater. Technol 122(1), 104-107 (Mar 10, 1999) (4 pages) doi:10.1115/1.482773 History: Received May 21, 1998; Revised March 10, 1999
Copyright © 2000 by ASME
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References

Vaccari,  J. A., 1992, “Laser Shocking Extends Fatigue Life,” American Machinist, 7, pp. 62–64.
Peyre,  P., Merrien,  P., and Lieurade,  H. P., , 1993, “Renforcementd’alliages- d’aluminum moul’esparondes dechocaser,” Mat’ eriaux & techniques, 6–7, pp. 7–12.
Grevey,  D., Maiffredy,  L., and Vannes,  A. B., 1992, “Laser shock on a TRIP alloy: mechanical and metalurgical consequences,” J. Mater. Sci., 27, pp. 2110–2116.
Puig,  T., Decamps,  B., and Bourda,  C., , 1992, “Deformation of a γ/γ′ Waspaloy After Laser Shock,” Mater. Sci. Eng., A154, pp. 183–191.
Hong,  Zhang, Yaxin,  Tang, and Chengye,  Yu, “Effects of Laser Shock Processing on the Fatigue Life of Fastener Holes,” Chin. J. Lasers, A23, No. 12, pp. 1112–1116.
Zeldovich Y. B., and Raizer Y. P., 1966, Physics of Shock Wave and High Temperature Hydrodynamics of Explosive Gas, New York, Academic Press, pp. 154-167.
Henrych, J., 1979, The Dynamics of Explosion and its Use. Elsevier, NY, pp. 63-72.
Romain J. P., Bauer, F., and Zanouri D., 1994, “Measurement of laser induced shock pressures using PVDF gauges,” High Pressure Science and Technology, 1993, S C. Schmidf, ed., American Institute of Physics, pp. 1915-1919.

Figures

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Schematic of the LSP process
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Sketch of PVDF transducer
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Stress wave on the front face of PVDF film
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Bi-detail fatigue specimen of 2024T62 Al alloy. All dimensions are in millimeters.
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Hardness distribution in the LSP area of 2024T62
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The microstructure comparison of 2024T62 aluminum alloy before and after LSP. (a) Microscopic photo of 2024T62 before LSP×20 K; (b) Microscopic photo of 2024T62 after LSP×20 K.
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The fatigue fracture of 2024T62. (a) Fracture of LSP specimen×200; (b) fracture of unshocked specimen×200

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