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Proceedings Paper

Predictive assessment and experimental characterization of the influence of irradiation parameters on surface deformation and residual stresses in laser-shock-processed metallic alloys
Author(s): Jose Luis Ocana; Miguel Morales; Carlos Molpeceres; Jorge Torres; Juan Antonio Porro; Gilberto Gomez; Carlos Rubio
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Paper Abstract

Although valuable experimental work has been performed in order to explore the optimum conditions of application of the treatments and to assess their capability to provide enhanced mechanical properties, there is little work done on the theoretical prediction of these optimum parameters. In the present paper, a model is presented to provide an estimation of the residual stresses and surface deformation in order to see the influence of the different parameters in the process. The influence of pulse duration, pulse pressure peak, spot radius, number of shots, overlapped shots and material properties are studied. The great influence of 3D deformation effects in the process is clearly shown as one of the most important limiting factors of the process traditionally neglected in previous literature. Additionally, from the experimental point of view, in the present paper a summary is provided of different results obtained from the most recent LSP experiments carried out by the authors along with some conclusions for the assessment of LSP technology as a profitable method for the extension of fatigue life in critical heavy duty components.

Paper Details

Date Published: 20 September 2004
PDF: 12 pages
Proc. SPIE 5448, High-Power Laser Ablation V, (20 September 2004); doi: 10.1117/12.548859
Show Author Affiliations
Jose Luis Ocana, Univ. Politecnica de Madrid (Spain)
Miguel Morales, Univ. Politecnica de Madrid (Spain)
Carlos Molpeceres, Univ. Politecnica de Madrid (Spain)
Jorge Torres, Univ. Politecnica de Madrid (Spain)
Juan Antonio Porro, Univ. Politecnica de Madrid (Spain)
Gilberto Gomez, Ctr. de Ingenieria y Desarrollo Industrial (Mexico)
Carlos Rubio, Ctr. de Ingenieria y Desarrollo Industrial (Mexico)

Published in SPIE Proceedings Vol. 5448:
High-Power Laser Ablation V
Claude R. Phipps, Editor(s)

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