Laser shock peening: toward the tse of pliable polid polymers for confinement
Article dans une revue avec comité de lecture
This paper presents the first extensive study of the performances of solid polymers used as confinement materials for laser shock applications such as laser shock peening (LSP) as opposed to the exclusively used water-confined regime up to now. The use of this new confinement approach allows the treatment of metal pieces needing fatigue behavior enhancement but located in areas which are sensitive to water. Accurate pressure determination in the polymer confinement regime was performed by coupling finite element simulation and experimental measurements of rear free-surface velocity using the velocity interferometer system for any reflector (VISAR). Pressure could reach 7.6 and 4.6 GPa for acrylate-based polymer and cross-linked polydimethylsiloxane (PDMS), respectively. At 7 and 4.7 GW/cm2, respectively, detrimental laser breakdown limited pressure for acrylate and PDMS. These results show that the pressures produced were also as high as in water confinement, attaining values allowing the treatment of all types of metals with LSP and laying the groundwork for future determination of the fatigue behavior exhibited by this type of treated materials.
Showing items related by title, author, creator and subject.
Laser induced plasma characterization in direct and water confined regimes: new advances in experimental studies and numerical modelling Article dans une revue avec comité de lectureSCIUS-BERTRAND, Marine; VIDEAU, Laurent; RONDEPIERRE, Alexandre; LESCOUTE, Emilien; ROUCHAUSSE, Yann; KAUFMAN, Jan; ROSTOHAR, Danijela; BRAJER, Jan; BERTHE, Laurent (IOP Publishing, 2021)Optimization of the laser shock peening (LSP) and LASer Adhesion Test (LASAT) processes requires control of the laser-induced target's loading. Improvements to optical and laser technologies allow plasma characterization ...
Novel Confinement Possibility for Laser Shock: Use of Flexible Polymer Confinement at 1064 nm Wavelength Article dans une revue avec comité de lectureLE BRAS, Corentin; RONDEPIERRE, Alexandre; AYAD, Mohammad; GERVAIS, Matthieu; VALADON, Stéphane; BERTHE, Laurent (MDPI AG, 2021)Through the years, laser shock peening became a treatment of choice in the aerospace industry to prolong the life of certain critical pieces. Water flow is commonly used as a confinement to improve the process capability ...
Identification of constitutive equations at very high strain rates using shock wave produced by laser Article dans une revue avec comité de lectureSEDDIK, Raoudha; RONDEPIERRE, Alexandre; PRABHAKARAN, Subramaniyan; MORIN, Léo; FAVIER, Véronique; PALIN-LUC, Thierry; BERTHE, Laurent (Elsevier, 2021)A method coupling experiments and simulations, is developed to characterize the yield stress and strain hardening of several metals loaded at 10⁶ s−ⁱ and < 25 ns, typically involved during Laser Shock Peening. It was applied ...
Modeling of multi-edge effects in the case of laser shock loadings applied on thin foils: Application for material characterization of aluminum alloys Article dans une revue avec comité de lectureAYAD, M.; LAPOSTOLLE, L.; RONDEPIERRE, A.; LE BRAS, C.; SCIUS-BERTRAND, M.; ÜNALDI, S.; TRDAN, U.; ROUCHAUSSE, Y.; GRASSY, J.; MAILLOT, T.; LAPOUJADE, V.; MICHEL, C.; BERTHE, L. (AIP Publishing, 2022)This article presents the study of the shock wave propagation through aluminum alloys (pure aluminum and aluminum 2024-T3) produced by laser plasma using experimental and numerical tests. Water confinement regime interaction, ...
Laser interaction in a water tank configuration: Higher confinement breakdown threshold and greater generated pressures for laser shock peening Article dans une revue avec comité de lectureRONDEPIERRE, Alexandre; ROUCHAUSSE, Yann; VIDEAU, Laurent; CASAGRANDE, Olivier; CASTELNAU, Olivier; BERTHE, Laurent (AIP Publishing LLC, 2021-10)The authors present a new configuration for laser-induced plasmas in confined regimes for a 10 ns-range laser pulse in the green wavelength (532 nm) that repulses the breakdown threshold above 20 GW/cm2 compared to 8 GW/cm2 ...