Finite element analysis of laser shock peening of 2050-T8 aluminum alloy
TypeArticles dans des revues avec comité de lecture
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 work is to investigate the residual stress distribution induced by laser shock processing in a 2050-T8 aeronautical aluminium alloy with both X-ray diffraction measurements and 3D finite element simulation. The method of X-ray diffraction is extensively used to characterize the crystallographic texture and the residual stress crystalline materials at different scales (macroscopic, mesoscopic and microscopic). Shock loading and materials’ dynamic response are experimentally analysed using Doppler velocimetry in order to use adequate data for the simulation. Then systematic experience versus simulation comparisons are addressed, considering first a single impact loading, and in a second step the laser shock processing treatment of an extended area, with a specific focus on impact overlap. Experimental and numerical results indicate a residual stress anisotropy, and a better surface stress homogeneity with an increase of impact overlap. A correct agreement is globally shown between experimental and simulated residual stress values, even if simulations provide us with local stress values whereas X-ray diffraction determinations give averaged residual stresses.
Showing items related by title, author, creator and subject.
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 ...
PEYRE, Patrick; 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 ...
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 ...
Analysis of As-Built Microstructures and Recrystallization Phenomena on Inconel 625 Alloy Obtained via Laser Powder Bed Fusion (L-PBF) DE TERRIS, Thibaut; CASTELNAU, Olivier; HADJEM-HAMOUCHE, Zehoua; HADDADI, Halim; MICHEL, Vincent; PEYRE, Patrice (MDPI AG, 2021-04-12)The microstructures induced by the laser-powder bed fusion (L-PBF) process have been widely investigated over the last decade, especially on austenitic stainless steels (AISI 316L) and nickel-based superalloys (Inconel ...
Experimental and numerical assessment of subsurface plastic deformation induced by OFHC copper machining OUTEIRO, José; CAMPOCASSO, Sébastien; DENGUIR, Lamice; FROMENTIN, Guillaume; VIGNAL, Vincent; POULACHON, Gérard (Elsevier, 2015)Strain distributions in the machined surface and subsurface of OFHC copper workpieces were determined experimentally and through numerical simulations. An experimental setup, comprising a double frame camera and a pulsed ...