New trends in laser shock wave physics and applications

Peyre, P.; Carboni, Christelle; Sollier, Arnaud; Berthe, Laurent; Richard, Caroline; Rios, Eduardo de los; Fabbro, R.

doi:10.1117/12.482138

Cited by 16 publications

(3 citation statements)

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“…Yet, in the LSPwC configuration, some thermal damages can occur and the surface will experience oxidation [12]. In addition, both roughness and stress measurements made between large and small focal spot configurations are greatly different [13].…”

Section: Plasma Lifetime Measurements With High-speed Photodiodementioning

confidence: 99%

Beam size dependency of a laser-induced plasma in confined regime: Shortening of the plasma release. Influence on pressure and thermal loading

Rondepierre

Ünaldi

Rouchausse

et al. 2021

Optics & Laser Technology

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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.

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Section: Plasma Lifetime Measurements With High-speed Photodiodementioning

confidence: 99%

Beam size dependency of a laser-induced plasma in confined regime: Shortening of the plasma release. Influence on pressure and thermal loading

Rondepierre

Ünaldi

Rouchausse

et al. 2021

Optics & Laser Technology

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“…Until recently, most experimental studies concerning laser interaction in a confined regime have been focused on investigating the dynamics of induced shock waves and exploring the conditions which optimize the shock pressure imparted to the sample. Indeed, the amplitude and duration of these shock waves are the main processing parameters for most laser shock processing applications [12,[55][56][57][58], which to date have been the primary users of confined laser-matter interaction.…”

Section: Experimental Data and Characterization Of Confined Plasmasmentioning

confidence: 99%

“…Since 1970, many works have sought to measure or simulate the maximum plasma pressure, mainly as a function of the maximum laser intensity [21,28,33,53,54,56,89,106]. Previous works have also demonstrated that the maximum reached pressure does not depend on the pulse duration [27,55] or on the laser spot size [37].…”

Section: Plasma Pressure In Confined Regime-range Of Pressures Obtained Through Experiments and Simulationsmentioning

confidence: 99%

Review on Laser Interaction in Confined Regime: Discussion about the Plasma Source Term for Laser Shock Applications and Simulations

Rondepierre

Sollier

Videau

et al. 2021

Metals

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This review proposes to summarize the development of laser shock applications in a confined regime, mainly laser shock peening, over the past 50 years since its discovery. We especially focus on the relative importance of the source term, which is directly linked to plasma pressure. Discussions are conducted regarding the experimental setups, experimental results, models and numerical simulations. Confined plasmas are described and their specific properties are compared with those of well-known plasmas. Some comprehensive keys are provided to help understand the behavior of these confined plasmas during their interaction with laser light to reach very high pressures that are fundamental for laser shock applications. Breakdown phenomena, which limit pressure generation, are also presented and discussed. A historical review was conducted on experimental data, such as pressure, temperature, and density. Available experimental setups used to characterize the plasma pressure are also discussed, and improvements in metrology developed in recent years are presented. Furthermore, analytical and numerical models based on these experiments and their improvements, are also reviewed, and the case of aluminum alloys is studied through multiple works. Finally, this review outlines necessary future improvements that expected by the laser shock community to improve the estimation of the source term.

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General Introduction

Zhou

2021

Gradient Microstructure in Laser Shock Peened Materials

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New trends in laser shock wave physics and applications

Cited by 16 publications

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Beam size dependency of a laser-induced plasma in confined regime: Shortening of the plasma release. Influence on pressure and thermal loading

Beam size dependency of a laser-induced plasma in confined regime: Shortening of the plasma release. Influence on pressure and thermal loading

Review on Laser Interaction in Confined Regime: Discussion about the Plasma Source Term for Laser Shock Applications and Simulations

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