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Proceedings Paper

Laser shock processing to improve residual stresses with and without paint layer on 6061-T6 aluminum alloy
Author(s): G. Gomez-Rosas; C. Rubio-Gonzalez; J. L. Ocaña; C. Molpeceres; J. A. Porro; M. Morales; F. J. Casillas; M. Mora-Gonzalez; W. Chi-Moreno
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Paper Abstract

Laser shock processing (LSP) or laser shock peening has been proposed as a competitive alternative technology to classical treatments for improving fatigue and wear resistance of metals. This process induces a compressive residual stress field which increases fatigue crack initiation life and reduce fatigue crack growth rate. We present a configuration and results in the LSP concept for metal surface treatments in underwater laser irradiation at 1064 nm with and without a thin surface paint layer. A convergent lens is used to deliver 1, 2 J/cm2 with a 8 ns laser FWHM pulse produced by a 10 Hz, Q-switched Nd:YAG laser with a spot diameter of a 1,5 mm moving forward along the workpiece. A LSP configuration with experimental results using a pulse density of 5000 pulses/cm2 in 6061-T6 aluminum samples are presented.

Paper Details

Date Published: 18 May 2007
PDF: 7 pages
Proc. SPIE 6422, Sixth Symposium Optics in Industry, 64220U (18 May 2007); doi: 10.1117/12.742618
Show Author Affiliations
G. Gomez-Rosas, Univ. de Guadalajara (Mexico)
C. Rubio-Gonzalez, Ctr. de Ingeniería y Desarrollo Industrial (Mexico)
J. L. Ocaña, Univ. Politécnica de Madrid (Spain)
C. Molpeceres, Univ. Politécnica de Madrid (Spain)
J. A. Porro, Univ. Politécnica de Madrid (Spain)
M. Morales, Univ. Politécnica de Madrid (Spain)
F. J. Casillas, Univ. de Guadalajara (Mexico)
M. Mora-Gonzalez, Univ. de Guadalajara (Mexico)
W. Chi-Moreno, Instituto Tecnológico de Morelia (Mexico)


Published in SPIE Proceedings Vol. 6422:
Sixth Symposium Optics in Industry

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