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RESEARCH PRODUCT
Analysis of laser shock waves and resulting surface deformations in an Al-Cu-Li aluminium alloy
I. PopaPatrick PeyreVincent VignalThierry BaudinLaurent Berthesubject
Shock wavematière Condensée: Science des matériaux [Physique]Materials sciencechocMatériaux [Sciences de l'ingénieur]Acoustics and UltrasonicsField (physics)Constitutive equation02 engineering and technology01 natural sciences[SPI.MAT]Engineering Sciences [physics]/MaterialsResidual stress0103 physical sciencesComposite materialMécanique: Mécanique des matériaux [Sciences de l'ingénieur]010302 applied physicsaluminiumsimulation numérique021001 nanoscience & nanotechnologyCondensed Matter PhysicsMicrostructureFinite element methodSurfaces Coatings and FilmsElectronic Optical and Magnetic MaterialsShock (mechanics)laserAmplitudeSIMULATION0210 nano-technologydescription
Abstract 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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2012-08-06 |