Effect of laser shock peening on the high temperature oxidation resistance of titanium
TypeArticles dans des revues avec comité de lecture
The effect of laser shock peening on the high temperature oxidation resistance of commercial pure titanium at high temperature (700 °C) was studied in long-time (3000 h) exposure under dry air. A reduction of the gain mass by a factor 4 was found for laser-shock peened (LSP) samples compared to untreated titanium, which supports the interest of laser-shock treatment for the improvement of high temperature resistance. Short-durations (10 h and 100 h) oxidation experiments, devoted to investigate the influence of the LSP treatment on the first stages of the oxidation process, were also carried out by TGA. Several techniques as scanning electron microscopy, hardness and roughness measurements, X-ray diffraction and X-ray photoelectron spectrometry, micro-Raman spectroscopy, nuclear reaction analysis and electron backscattered diffraction were used to characterize the sample after laser treatment and oxidations. The formation of a continuous nitrogen-rich layer between the oxide layer and the α-case area in LSP samples appears to be the key factor to explain the reduction of oxygen diffusion, and thus the improvement of the oxidation resistance of laser shocked titanium. Moreover, the grain-texture of LSP samples after oxidation can also explain the improvement of the high temperature oxidation resistance after long times exposures.
Files in this item
Showing items related by title, author, creator and subject.
Etude thermique des bains liquides et son effet sur l’état de surface des pièces fabriquées par le procédé de Fabrication Directe par Projection Laser (FDPL) GHARBI, Myriam; PEYRE, Patrice; GORNY, Cyril; FABBRO, Rémy; MULLER, Maryse; CARIN, Muriel; MORVILLE, Simon; CARRON, Denis; LE MASSON, Philippe (Société Française de Thermique / Congrès Français de Thermique - Thermique en conditions extrêmes, 29 mai - 1er juin 2012, Bordeaux, 2012)La fabrication directe par projection laser (FDPL) est un procédé de prototypage rapide et de fabrication des petites séries de pièces complexes, par simple interaction entre un faisceau laser, un substrat, et une poudre ...
3D Laser Shock Peening – A new method for the 3D control of residual stresses in Selective Laser Melting KALENTICS, Nikola; BOILLAT, Eric; PEYRE, Patrice; GORNY, C; KENEL, Christoph; LEINENBACH, Christian; JHABVALA, Jamasp; E. LOGÉ, Roland (Elsevier, 2017)This paper describes a hybrid additive manufacturing process – 3D Laser Shock Peening (3D LSP), based on the integration of Laser Shock Peening (LSP) with selective laser melting (SLM). The well-known tensile residual ...
Influence of a pulsed laser regime on surface finish induced by thedirect metal deposition process on a Ti64 alloy GHARBI, Myriam; PEYRE, Patrice; GORNY, Cyril; MORVILLE, Simon; LE MASSON, Philippe; CARRON, Denis; FABBRO, Rémy; CARIN, Muriel (ELSEVIER, 2014)tThe direct metal deposition (DMD) laser technique is a free-form metal deposition process, which allowsgenerating a prototype or small series of near net-shape structures. Despite numerous advantages, oneof the most ...
Influence of various process conditions on surface finishes induced by the direct metal deposition laser technique on a Ti–6Al–4V alloy GHARBI, Myriam; PEYRE, Patrice; GORNY, cyril; CARIN, Muriel; MORVILLE, Simon; LE MASSON, Philippe; CARRON, denis; FABBRO, Rémy (Elsevier, 2012)The direct metal deposition (DMD) with laser is a free-form metal deposition process for manufacturing dense pieces, which allows generating a prototype or small series of near net-shape structures. One of the most critical ...
CHERUBINI, Stefania; DE TULLIO, Marco; DE PALMA, Pietro; PASCAZIO, Giuseppe (American Society of Mechanical Engineers (ASME), 2013)This work provides a three-dimensional energy optimization analysis, looking for perturbations inducing the largest energy growth at a finite time in a boundary-layer flow in the presence of roughness elements. The immersed ...