Laser induced plasma characterization in direct and water confined regimes: new advances in experimental studies and numerical modelling

Scius-Bertrand, Marine; Videau, L.; Rondepierre, Alexandre; Lescoute, E.; Rouchausse, Yann; Kaufman, Jan; Rostohar, Danijela; Brajer, Jan; Berthe, Laurent

doi:10.1088/1361-6463/abc040

Cited by 32 publications

(35 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The difference can be explained by the damaging of the confinement which causes the absorption of more incident laser energy during the shots as well as triggers the breakdown phenomenon sooner. These data were compared with the pressures obtained while using the code given in Scius-Bertrand et al work [24] and gave similar results.…”

Section: Pressure Measurementmentioning

confidence: 61%

“…Figure 3 shows the plasma pressure determined from backface velocity measurement depending on the incident laser intensity for pulse durations of 7 and 21 ns at 1064 nm wavelength. Pressures at 532 nm with water and solid confinement from [9] as well as pressures under water confined regime at 1053 nm with a 10 ns laser pulse from [24] are also reported. The pressure increases linearly for the two wavelengths up to 6 GW/cm 2 .…”

Section: Pressure Measurementmentioning

confidence: 88%

“…The similarity of the results shows that the phenomena taking place during the laser interaction with water and flexible polymer confinement are likely akin in terms of laser-matter interaction. [9] at 532 nm with a pulse duration of 9 ns and with results at 1053 nm with a pulse duration of 10 ns from [24].…”

Section: Pressure Measurementmentioning

confidence: 94%

See 2 more Smart Citations

Novel Confinement Possibility for Laser Shock: Use of Flexible Polymer Confinement at 1064 nm Wavelength

Bras

Rondepierre

Ayad

et al. 2021

Metals

Self Cite

View full text Add to dashboard Cite

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 but some applications cannot allow for water presence in the area of interest. In a previous article, an alternative to the water confinement was presented, a flexible polymer confinement was used and demonstrated the production of pressures equivalent to the water configuration treatment. However, laser parameters have been restricted to a wavelength in the visible range at 532 nm. In this paper, the study is extended to 1064 nm which is commonly used in LSP applications and with two different pulse durations. A 1064 nm near infra-red laser is used to do pressure characterization of shots with polymer confinement through Velocity Interferometer System for Any Reflector (VISAR) measurements coupled with Finite Element Modelling on Abaqus software. The results show that the pressures produced by the confinement is slightly lower with the 1064 nm wavelength, similar to what is observed with the classic water confined regime when switching from 532 nm to a near infra-red wavelength. Nevertheless, the high level of pressure produced by laser shock under the polymer confinement configuration allows for the treatment of common types of metal alloys used in the aerospace industry. Although the use of such a confinement has yet to be applicable to peening setups, it has already uses in some single shot configurations such as LasAT where it allows the avoidance of the water flow optimization.

show abstract

Section: Pressure Measurementmentioning

confidence: 61%

Section: Pressure Measurementmentioning

confidence: 88%

See 1 more Smart Citation

Novel Confinement Possibility for Laser Shock: Use of Flexible Polymer Confinement at 1064 nm Wavelength

Bras

Rondepierre

Ayad

et al. 2021

Metals

Self Cite

View full text Add to dashboard Cite

show abstract

“…Thresholds were found to be I b,ω = 10 GW/cm²; I b,2ω = 6 GW/cm²; I b,3ω = 4 GW/cm² at 1064 nm, 532 nm and 355 nm, respectively, [26]. More recent experiments performed at 1064 nm and 532 nm, for a pulse duration of 7 ns, gave different results: I b,ω = 8 GW/cm² and I b,2ω = 10 GW/cm² [53].…”

Section: Breakdown Plasma Generationmentioning

confidence: 91%

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

Self Cite

View full text Add to dashboard Cite

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.

show abstract

“…In addition, Scius‐Bertrand et al [ 60 ] proposed a self‐consistent model of shockwave pressure versus time through the inverse method and verified the accuracy of this model under multiple parameters, which further expand the application scope of the pressure prediction model.…”

Section: Fundamental Mechanisms Of Lspmentioning

confidence: 99%

Recent Developments and Novel Applications of Laser Shock Peening: A Review

2021

View full text Add to dashboard Cite

Wear, corrosion, and fatigue are responsible for more than 80% of the failures of metallic materials. As most failures caused by wear, corrosion, and fatigue initiate from the material surface, surface integrity has a crucial impact on the overall performance of the materials. Surface integrity characteristics, including hardness, microstructure, morphology, roughness, and residual stress status, can significantly affect the wear and corrosion behavior. By improving hardness and introducing beneficial compressive residual stresses in the near-surface region, laser shock peening (LSP) can significantly improve the fatigue performance of metallic materials. In the LSP process, light from a high-energy pulsed laser penetrates through the transparent confinement media and irradiates the ablative coating, quickly heating the affected area to a high temperature and generating high-pressure plasma. The expansion of the plasma causes a shockwave that can plastically deform the target metals, resulting in work hardening and compressive residual stresses. Compared with shot peening (SP), LSP has the following advantages. 1) LSP can produce deeper layers of compressive residual stresses; 2) the process parameters in LSP can be precisely controlled; 3) the surface integrity of the parts after LSP is improved without the need for postprocessing; 4) LSP can be used to treat components with complex geometry; and 5) LSP has a high processing efficiency and makes for a clean working environment. Because LSP represents a new generation of surface strengthening technology that can replace SP, it has gained wide attention. Askar'yan and Moroz measured the pressures exerted by a high-intensity laser beam on the surface of a metal target [1] and found that this pressure is sufficient for steering space vehicles. However, the experiments were conducted under vacuum conditions to prevent dielectric breakdown, and such conditions are not practical for use in industry. [2] Anderholm at Sandia Laboratories irradiated an aluminum film covered in quartz with a laser beam and found that the presence of a transparent confinement layer can significantly increase the shock pressure. [3] Although this experiment was also conducted in vacuum, it proved that with the presence of a transparent confinement layer, a laser power density that does not cause dielectric breakdown in air can also generate a sufficiently large shock pressure. This observation is of great significance for the later industrial applications that involve laser-generated shockwaves.Fairand et al. at Battelle Memorial Institute changed the microstructure of 7075 aluminum alloy through short-pulse, laser-induced shockwaves with a high power density, and they found that after processing, the stress corrosion cracking (SCC) resistance and fatigue performance of the alloy improved. [4] This is a key event in the development of LSP; after this study, the National Science Foundation of the United States began to support the investigation of LSP. Clauer et al. [5] changed the intensity ...

show abstract

Laser induced plasma characterization in direct and water confined regimes: new advances in experimental studies and numerical modelling

Cited by 32 publications

References 39 publications

Novel Confinement Possibility for Laser Shock: Use of Flexible Polymer Confinement at 1064 nm Wavelength

Novel Confinement Possibility for Laser Shock: Use of Flexible Polymer Confinement at 1064 nm Wavelength

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

Recent Developments and Novel Applications of Laser Shock Peening: A Review

Contact Info

Product

Resources

About