Analysis of laser shock waves and resulting surface deformations in an Al-Cu-Li aluminium alloy
TypeArticles dans des revues avec comité de lecture
Laser shock processing (LSP) is now a recognized surface treatment for improving fatigue or corrosion behaviour of metallic materials through the generation of a compressive stress field. In turn, the analysis of shock wave propagation is of primary importance to predict numerically morphological and mechanical surface modifications. Considering experimental and numerical analysis of shock wave propagation, and surface deformations induced by single impacts, a 2050 aluminium alloy having different microstructural was investigated under laser-shock loading. In a first step, the evolution of shock wave attenuation and elastic precursor amplitude was correctly reproduced by finite element simulations, and in a second step, surface deformations induced by 1 to 6 local impacts were also compared satisfactorily with experiments. This allowed us to validate mechanical loading and materials’ constitutive law, but did not allow determining accurately residual stress fields on a single impact.
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PEYRE, Patrice; BERTHE, Laurent; VIGNAL, Vincent; POPA, Ioana; BAUDIN, T. (IOP Publishing, 2012)Laser shock processing is now a recognized surface treatment for improving fatigue or corrosion behaviour of metallic materials through the generation of a compressive stress field. In turn, the analysis of shock wave ...
HFAIEDH, Neila; PEYRE, Patrice; SONG, Hongbin; POPA, Ioana; JI, Vincent; VIGNAL, Vincent (Elsevier, 2015)Laser shock processing is a recently developed surface treatment designed to improve the mechanical properties and fatigue performance of materials, by inducing a deep compressive residual stress field. The purpose of this ...
Texture control of 316L parts by modulation of the melt pool morphology in selective laser melting ANDREAU, Olivier; KOUTIRI, Imade; PEYRE, Patrice; PENOT, Jean-Daniel; SAINTIER, Nicolas; PESSARD, Etienne; DE TERRIS, Thibaut; DUPUY, Corinne; BAUDIN, Thierry (elsevier, 2019)In this study, 316L parts were fabricated with the selective laser melting additive layer manufacturing process using unidirectional laser scan to control their texture. The melt pool shape, microstructure and texture of ...
Local electrochemical impedance spectroscopy study of the influence of ageing in air and laser shock processing on the micro-electrochemical behaviour of AA2050-T8 aluminium alloy KRAWIEC, Halina; VIGNAL, Vincent; AMAR, Hassan; PEYRE, Patrice (Elsevier, 2011)In the present paper, the micro-electrochemical behaviour of AA2050-T8 in 0.1 M NaCl was first studied after polishing by means of local electrochemical impedance spectroscopy and field-emission scanning electron ...
(TaC/Ta2C) bilayer formed on carburized and annealed tantalum; development of a numerical growth model CARETTE, Laurent; JACQUET, Philippe; COTTON, Dominique; VIGNAL, Vincent; FAURE, Sébastien (Elsevier, 2019)This paper describes a model developed to simulate the evolution of carbide layers (TaC/Ta2C) formed during carburizing and annealing treatments of tantalum. The model is based on a parabolic evolution of the layer thickness ...