Research on the technical principle and typical applications of laser shock processing

Wu, Jiajun; Zhao, Jibin; Qiao, Hongchao; Hu, Xianliang; Yang, Yuqi

doi:10.1016/j.matpr.2020.10.618

Cited by 7 publications

(2 citation statements)

References 42 publications

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“…To enhance the fatigue life or reduce stress corrosion cracking in structured metallic components, it has been resorted to form a surface with certain depth of compressive residual stress by conventional shot peening (SP) [1,2] or by recently developed laser shock peening (LSP) [3][4][5]. LSP has advantages of processing and properties over SP [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

The Finite Element Analysis on the Effects of Overlapping Rate in Low-Energy Laser Shock Peening

Qin

Li²,

Shi

et al. 2023

AMR

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Laser shock peening has been widely studied and pioneeringly applied in aerospace industry as a life-extension technology for structured mechanical components. However, in other promising fields such as nuclear power industry, little has been studied concerning such critical issues as long-distance transmission of the laser beam by optical fiber and optimized parameters of typically low pulse energy with micrometer-sized beam spots. In such scenario, the overlapping rate between adjacent small spots plays a critical role in obtaining homogenous residual stress and surface morphology. In this study, a three-dimensional finite element model in AISI 420 martensitic stainless steel has been developed to correlate the residual stress as well as surface morphology with varying overlapping rates. Multiple laser spots are loaded with VDLOAD user subroutine in Abaqus. The residual stress distribution is analyzed with respects of laser shocking and in-depth planes. And the surface morphology is evaluated in terms of depression depth as well as surface roughness. Combined results suggest that the overlapping rate of 61% as an optimized value, which can be used as a basis for future experimental studies and industrial applications.

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Section: Introductionmentioning

confidence: 99%

The Finite Element Analysis on the Effects of Overlapping Rate in Low-Energy Laser Shock Peening

Qin

Li²,

Shi

et al. 2023

AMR

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“…Plastic deformation technology of materials refers to the processing of micro-texture structures by applying a load to the base material that exceeds the range of elastic deformation under the action of an external force. Such processing techniques include conventional vibration-impact processing techniques [ 18 , 19 , 20 ], ultrasonic vibration machining techniques [ 21 , 22 ], embossing techniques [ 23 ], and laser shocking techniques [ 24 , 25 , 26 , 27 , 28 ]. Currently, laser surface micromachining techniques and electrolytic processing techniques are the mainstream texture processing techniques.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Texture Coupling Mechanism and Antifriction Performance of Piston Rod Seal Pair

Tang

Zeng

2022

Micromachines

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The effect of the coupling texture on the friction and wear of a piston rod-rubber seal pair under lubricating conditions is studied in this paper. Crescentiform textures with different area densities were fabricated on high carbon chromium bearing steel (GCr15) and ethylene propylene diene monomer (EPDM) materials by using a laser marking machine. We compare and analyze the effects of untextured, single-textured, and coupling-textured surfaces on the friction characteristics of the piston rod-rubber seal pair by conducting tests on the reciprocating module of the UMT-2 friction and wear testing machine. The results showed that the coupling-textured surface had the lowest coefficient of friction and wear compared to the untextured and single-textured surfaces. When the normal load was 10 N under the optimal coupling texture area density (6.4%), the friction and wear of the sealing pair decreased the most. Compared with the untextured surface, the friction coefficient was reduced by 27.9% and the wear amount was reduced by 30.0%; compared with the single-textured surface, the friction coefficient was reduced by 18.9%, and the wear amount was reduced by 23.8%. The coupling effect generated by the coupling texture effectively enhanced the formation and stabilization of the oil lubricant film and effectively captured wear debris, preventing it from continuously scratching the surface and reducing wear and roughness.

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Laser Peening: A Review of the Factors, Effects, Applications, Comparison with Shot Peening and State-of-the-Art

AYEB,

FRIJA,

FATHALLAH

2023

Met. Mater. Int.

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Research on the technical principle and typical applications of laser shock processing

Cited by 7 publications

References 42 publications

The Finite Element Analysis on the Effects of Overlapping Rate in Low-Energy Laser Shock Peening

The Finite Element Analysis on the Effects of Overlapping Rate in Low-Energy Laser Shock Peening

Experimental Study on Texture Coupling Mechanism and Antifriction Performance of Piston Rod Seal Pair

Laser Peening: A Review of the Factors, Effects, Applications, Comparison with Shot Peening and State-of-the-Art

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