Analysis of laser shock waves and resulting surface deformations in an Al-Cu-Li aluminum alloy
Article dans une revue avec comité de lecture
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 propagation is of primary importance to predict numerically morphological and mechanical surface modifications. Considering experimental and numerical analyses of shock wave propagation, and surface deformations induced by single impacts, a 2050 aluminum alloy having different microstructures 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 1-6 local impacts were also compared satisfactorily with experiments. This allowed us to validate mechanical loading and materials' constitutive law, but did not allow accurate determination of residual stress fields on a single impact.
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Article dans une revue avec comité de lecturePEYRE, Patrice; BERTHE, Laurent; VIGNAL, Vincent; POPA, Ioana; BAUDIN, Thierry (IOP Publishing, 2012)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 ...
Article dans une revue avec comité de lectureHFAIEDH, 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 ...
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 Article dans une revue avec comité de lectureKRAWIEC, 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 ...
Article dans une revue avec comité de lectureKROMER, Robin; COSTIL, Sophie; CORMIER, Jonathan; COURAPIED, Damien; BERTHE, Laurent; PEYRE, Patrice; BOUSTIE, Michel (Elsevier, 2015)In thermal spraying, adhesive bond strength is a feature of surface properties. An adapted surface is studied with prior-surface treatments to enhance interface energy. This study deals with Ni–Al coatings on 2017 aluminum ...
Article dans une revue avec comité de lectureCOURAPIED, Damien; KROMER, Robin; BERTHE, Laurent; PEYRE, Patrice; COSTIL, Sophie; CORMIER, Jonathan; BOUSTIE, Michel; MILHET, Xavier (Laser Institute of America, 2016)The laser shock adhesion test (LASAT) is a technique allowing the generation of high tensile stresses in materials. The LASAT consists in focusing a pulsed laser beam on a water-confined target. The laser pulse crosses the ...