Laser Peening Process and Its Impact on Materials Properties in Comparison with Shot Peening and Ultrasonic Impact Peening
TL;DR: The laser shock peening (LSP) process using a Q-switched pulsed laser beam for surface modification has been reviewed and enhancements in the surface micro and nanohardness, elastic modulus, tensile yield strength and refinement of microstructure which translates to increased fatigue life and fretting fatigue life, stress corrosion cracking (SCC) and corrosion resistance were addressed.
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Abstract: The laser shock peening (LSP) process using a Q-switched pulsed laser beam for surface modification has been reviewed. The development of the LSP technique and its numerous advantages over the conventional shot peening (SP) such as better surface finish, higher depths of residual stress and uniform distribution of intensity were discussed. Similar comparison with ultrasonic impact peening (UIP)/ultrasonic shot peening (USP) was incorporated, when possible. The generation of shock waves, processing parameters, and characterization of LSP treated specimens were described. Special attention was given to the influence of LSP process parameters on residual stress profiles, material properties and structures. Based on the studies so far, more fundamental understanding is still needed when selecting optimized LSP processing parameters and substrate conditions. A summary of the parametric studies of LSP on different materials has been presented. Furthermore, enhancements in the surface micro and nanohardness, elastic modulus, tensile yield strength and refinement of microstructure which translates to increased fatigue life, fretting fatigue life, stress corrosion cracking (SCC) and corrosion resistance were addressed. However, research gaps related to the inconsistencies in the literature were identified. Current status, developments and challenges of the LSP technique were discussed.
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TL;DR: In this paper, the authors extended LDF to functional and brittle materials sandwiched by elastomeric polymers on patterned 3D surface, and the performance was evaluated and mechanisms were studied.
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Plastic Deformation in Silicon Crystal Induced by Heat-Assisted Laser Shock Peening
TL;DR: In this paper, a heat-assisted laser shock peening process was used to induce strong dislocation activity and large compressive residual stress in silicon crystal as a sample material, and the residual stress was measured using Raman scattering.
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Analytical solution of anisotropic plastic deformation induced by micro-scale laser shock peening
TL;DR: In this article, anisotropic slip line theory is employed to derive the stress and deformation fields caused by micro-scale laser shock peening on single crystal aluminum which is oriented so that plane strain conditions are admitted.
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Effects of Surface Treatment on Fretting Fatigue Performance of Ti-6Al-4V
M. J. Shepard,P. S. Prevey,N. Jayaraman +2 more
- 01 Nov 2004
TL;DR: In this paper, the performance of Ti-6Al-4V after isothermal exposure was explored in test coupons in low plasticity burnished (LPB), shot peened (SP), and electropolished (ELP) baseline conditions.
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Parametric Study on Single Shot and Overlapping Laser Shock Peening on Various Metals via Modeling and Experiments
TL;DR: In this paper, a 3D finite element model is used to predict the residual stresses induced in the substrate material as well as the indentation profile on the substrate surface, and the model prediction of indentation profiles is compared with the experimental data.
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