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Proceedings Paper

Laser-matter interaction in laser shock processing
Author(s): Arnaud Sollier; Laurent Berthe; Patrice Peyre; Eric Bartnicki; Remy Fabbro
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Paper Abstract

Laser shock processing (LSP) is an emerging industrial process in the field of surface treatment with particular application to the improvement of fatigue and corrosion properties. In the standard configuration, the metal sample is coated with a sacrificial layer in order to protect it from detrimental thermal effects, and a water overlay is used to improve the mechanical coupling by a confining like effect. Whereas the induced mechanical effects are now well understood, very few studies have been realized concerning the thermal effects. For this purpose, the knowledge of the confined plasma microscopic parameters has a great importance. A complete model describing the laser-liquid-metal interaction is presented. The model predicts the time evolution of the plasma parmmeters (temperature, density, ionization) and allows us to compute the induced pressure and temperature in the metal sample. By comparing the numerical results with various experimental measurements, predictions can be made concerning the best laser irradiation conditions for LSP.

Paper Details

Date Published: 3 March 2003
PDF: 5 pages
Proc. SPIE 4831, First International Symposium on High-Power Laser Macroprocessing, (3 March 2003); doi: 10.1117/12.497617
Show Author Affiliations
Arnaud Sollier, Cooperation Laser Franco-Allemande (France)
Laurent Berthe, Cooperation Laser Franco-Allemande (France)
Patrice Peyre, Cooperation Laser Franco-Allemande (France)
Eric Bartnicki, Cooperation Laser Franco-Allemande (France)
Remy Fabbro, Cooperation Laser Franco-Allemande (France)

Published in SPIE Proceedings Vol. 4831:
First International Symposium on High-Power Laser Macroprocessing
Isamu Miyamoto; Kojiro F. Kobayashi; Koji Sugioka; Reinhart Poprawe; Henry Helvajian, Editor(s)

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