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Proceedings Paper

Laser shock peening and warm laser shock peening: process modeling and pulse shape influence
Author(s): Alessandro Fortunato; Leonardo Orazi; Gabriele Cuccolini; Alessandro Ascari
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Paper Abstract

Laser shock peening is a well-known technology able to enhance the fatigue life of mechanical components by means of the introduction of residual stresses on their surface. These stresses are induced by means of the recoil pressure caused by the abrupt expansion, in a confining medium, of a laser-vaporized coating layer. If high power densities are used the recoil pressure can be high enough to induce compressive residual stresses on the target surface and to modify its mechanical properties. These mechanical properties can be predicted if the recoil pressure of the ablating layer is determined. In this paper the influence of the laser pulse shape on the recoil pressure is determined by means of a proper modeling of the whole process and the difference between cold" and warm" laser shock peening is pointed out.

Paper Details

Date Published: 22 February 2013
PDF: 8 pages
Proc. SPIE 8603, High-Power Laser Materials Processing: Lasers, Beam Delivery, Diagnostics, and Applications II, 86030G (22 February 2013); doi: 10.1117/12.2007393
Show Author Affiliations
Alessandro Fortunato, Univ. degli Studi di Bologna (Italy)
Leonardo Orazi, Univ. degli Studi di Modena e Reggio Emilia (Italy)
Gabriele Cuccolini, Univ. degli Studi di Modena e Reggio Emilia (Italy)
Alessandro Ascari, Univ. degli Studi di Bologna (Italy)


Published in SPIE Proceedings Vol. 8603:
High-Power Laser Materials Processing: Lasers, Beam Delivery, Diagnostics, and Applications II
Friedhelm Dorsch, Editor(s)

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