Author(s)

X. Scherpereel, P. Peyre, R. Fabbro, G. Lederer & N. Celati

Abstract

Laser Shock Processing (LSP) consists in focusing a hish energy pulsed laser on metals to create shock waves and generate high compressiv^ stress fields Compared with conventional mechanical treatments (Shot Peenin^) residual stress levels are quite similar, but the affected depths are greater and surfaces are nearly preserved in terms of roughness and hardening. Beneficial effects have been previously observed on static and cyclic mechanical properties but to a very little extend on corrosion resistance. The present study deals with the effects of LSP on the pitting corrosion resistance of a 12% Cr martensitic stainless steel in a 0.01 M NaCl + 0 01M NaiSOj solution. Surface effects were characterised in terms of microstructure, hardenin* and residual stresses (measured by X-ray diffraction technique) Electroc

Keywords