Beam size dependency of a laser-induced plasma in confined regime: Shortening of the plasma release. Influence on pressure and thermal loading
Article dans une revue avec comité de lecture
Processes using laser-shock applications, such as Laser Shock Peening or Laser Stripping require a deep understanding of both mechanical and thermal loading applied. We hereby present new experimental measurements of the plasma pressure release regarding its initial dimension, which depends on the laser beam size. Our data were obtained through shock waves’ velocity analysis and radiometric assessments. A new model to describe the adiabatic release behavior of a laser-induced plasma with a dependency to the beam size is developed. The results and the associated model exhibit that the plasma release duration is shortened with smaller laser spots. As a consequence, with chosen smaller laser spots (0.6 mm to 1 mm), the thermal loading applied during the plasma lifetime will also decrease. These new results shall help for a better understanding of laser-matter interaction for laser-shock applications by giving more accurate plasma profiles. Thus, process simulations can be improved as well. Eventually, by considering recent developments with high-power Diode Pumped Solid-State lasers (DPSS), we now expect to develop a new configuration for LSP which could be applicable both without any thermal coating and deliverable by an optical fiber.
Files in this item
Showing items related by title, author, creator and subject.
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 ...
Development and optimization of Laser Shock Repeated Dense Peening (LSRDP) using most advanced laser architectures Article dans une revue avec comité de lectureRONDEPIERRE, Alexandre; CASAGRANDE, Olivier; ROUCHAUSSE, Yann; CASTELNAU, Olivier; BERTHE, Laurent (Optica Publishing Group, 2022-03)The laser shock peening process (LSP), used to reinforce metals, currently has two major configurations with limitations. (1) Laser irradiation with large spot sizes, but with the need to use a thermal protective coating ...
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 ...
Article dans une revue avec comité de lectureLE BRAS, Corentin; RONDEPIERRE, Alexandre; SEDDIK, Raoudha; SCIUS-BERTRAND, Marine; ROUCHAUSSE, Yann; VIDEAU, Laurent; FAYOLLE, Bruno; GERVAIS, Matthieu; MORIN, Leo; VALADON, Stéphane; ECAULT, Romain; FURFARI, Domenico; BERTHE, Laurent (MDPI, 2019)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 ...
Towards selective laser paint stripping using shock waves produced by laser-plasma interaction for aeronautical applications on AA 2024 based substrates Article dans une revue avec comité de lectureUNALDI, Selen; PAPADOPOULOS, Kosmas; RONDEPIERRE, Alexandre; ROUCHAUSSE, Yann; KARANIKA, Alexandra; DELIANE, Florent; TSERPES, Konstantinos; FLOROS, Giannis; RICHAUD, Emmanuel; BERTHE, Laurent (Elsevier BV, 2021)Laser stripping is a process which typically includes different forms of ablation phenomena. The presented work investigates a mechanical stripping process using high pressure laser-induced shock waves in a water confined ...