Search results for "Shot peening"

showing 3 items of 3 documents

Experimental and Numerical Analysis of the Distribution of Residual Stresses Induced by Laser Shock Peening in a 2050-T8 Aluminium Alloy

2011

Laser shock peening (LSP) is an innovative surface treatment technique successfully applied to improving fatigue performance of metallic material. The specific characteristic of (LSP) is the generation of a low work-hardening and a deep compressive residual stresses mechanically produced by a laser-induced shock wave propagating in the material. The aim of this study is to analyse the residual stress distribution induced by laser peening in 2050-T8 aluminium alloy experimentally by the X-ray diffraction technique (method sin2Y) and numerically, by a finite element numerical modelling. A specific focus was put on the residual stress distribution along the surface of the impacted material.

Shock waveMaterials scienceMechanical EngineeringLaser peeningMetallurgyPeeningCondensed Matter PhysicsShot peeningFinite element methodShock (mechanics)Mechanics of MaterialsResidual stressvisual_artAluminium alloyvisual_art.visual_art_mediumGeneral Materials ScienceMaterials Science Forum
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Improving the high temperature oxidation resistance of pure titanium by shot-peening treatments

2017

International audience; Shot-peening (SP) treatments have shown their capacity to improve the oxidation resistance of titanium and zirconium thanks to the large compressive stresses and the surface hardening induced by this mechanical process. However, shot-peening treatments can produce a surface chemical deposit, which can modify the high temperature oxidation resistance. Here, we study pure titanium samples shot-peened with different type of balls: tungsten carbide, alumina or glass. The oxidation behavior was studied at 700 °C in dry air by thermo gravimetric analysis for short isotherm oxidation periods up to 100 h. Also, long oxidation tests (3000 h) at 700 °C were performed with an i…

Thermogravimetric analysisMaterials scienceOxidechemistry.chemical_element02 engineering and technologyNitrideShot peening01 natural scienceschemistry.chemical_compoundX-ray photoelectron spectroscopyTungsten carbide0103 physical sciencesMaterials Chemistry010302 applied physicsZirconiumMetallurgy[CHIM.MATE]Chemical Sciences/Material chemistrySurfaces and InterfacesGeneral Chemistry021001 nanoscience & nanotechnologyCondensed Matter PhysicsSurfaces Coatings and Filmschemistry13. Climate action[ CHIM.MATE ] Chemical Sciences/Material chemistry0210 nano-technologyTitaniumSurface and Coatings Technology
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Influence of the Residual Stresses Induced by Shot-Peening on the Oxidation of Zr Plates

2014

The present study evaluates the influence of the residual stress on the oxidation rate of Zr at 650°C. It is shown that the oxidation rate can be substantially decreased by shot-peening. A systematic instigation of the various factors (such as the residual stress, the surface pollution and the chemical composition of the oxidation atmosphere) is realized to separate their influence on the oxidation. The influence of an annealing made after the shot-peening is also considered. One show that the pollution of the surface during the shot-peening process is not responsible for the oxidation rate decrease.

PollutionZirconiumMaterials scienceAnnealing (metallurgy)media_common.quotation_subjectMetallurgyGeneral Engineeringchemistry.chemical_elementShot peeningchemistryResidual stressChemical compositionOxidation ratemedia_commonAdvanced Materials Research
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