Laser shock processing to improve residual stresses with and without paint layer on 6061-T6 aluminum alloy

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

doi:10.1117/12.742618

18 May 2007 Laser shock processing to improve residual stresses with and without paint layer on 6061-T6 aluminum alloy

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

Author Affiliations +

Proceedings Volume 6422, Sixth Symposium Optics in Industry; 64220U (2007) https://doi.org/10.1117/12.742618
Event: Sixth Symposium Optics in Industry, 2007, Monterrey, Mexico

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.

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G. Gomez-Rosas, C. Rubio-Gonzalez, J. L. Ocaña, C. Molpeceres, J. A. Porro, M. Morales, F. J. Casillas, M. Mora-Gonzalez, and W. Chi-Moreno "Laser shock processing to improve residual stresses with and without paint layer on 6061-T6 aluminum alloy", Proc. SPIE 6422, Sixth Symposium Optics in Industry, 64220U (18 May 2007); https://doi.org/10.1117/12.742618

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