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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Citations
The New Technologies Developed from Laser Shock Processing.
TL;DR: The technical theory of LSP was summarized, which consists of the fundamental principle of L SP and the laser-induced plasma shock wave and the new technologies developed from LSP are introduced in detail.
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Effect of ultrasonic nanocrystalline surface modification on the water droplet erosion performance of Ti6Al4V
TL;DR: In this paper, the effect of ultrasonic nanocrystalline surface modification (UNSM) on the water droplet erosion (WDE) performance of Ti 6Al 4V was studied.
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Research and development status of laser peen forming: A review
TL;DR: Laser peen forming (LPF) is a non-contact sheet metal forming process, in which a laser-induced shockwave is utilized to accurately bend, shape, precision-align, adjust, and/or repair engineering components as discussed by the authors.
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Laser shock peening regulating aluminum alloy surface residual stresses for enhancing the mechanical properties: Roles of shock number and energy
He Zhaoru,Yizhou Shen,Jie Tao,Haifeng Chen,Xiaofei Zeng,Xin Huang,Ali Abd El-Aty,Ali Abd El-Aty +7 more
TL;DR: In this paper, the laser shock peening (LSP) was used to treat aircraft 5A06 aluminum alloy, leading to significant enhancement of properties, including micro-hardness, which was increased to 140 HV, a value 65% higher than that of bare aluminum.
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Laser shock peening studies on SS316LN plate with various sacrificial layers
Pardhu Yella,P. Venkateswarlu,Ramesh Kumar Buddu,D.V. Vidyasagar,K. Bhanu Sankara Rao,P. Prem Kiran,Koteswararao V. Rajulapati +6 more
TL;DR: In this article, laser shock peening was performed in direct ablation mode as well as with various sacrificial layers such as black paint, transparent adhesive tape and absorbing adhesive tape.
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References
Laser shock processing and its effects on microstructure and properties of metal alloys: a review
TL;DR: In this paper, the current status of research and development on laser shock processing of metals, also known as laser peening, using Q-switched high power lasers is reviewed and the influence of processing parameters on the laser-induced shock waves in metal components are discussed and analyzed.
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Laser shock processing of aluminium alloys. Application to high cycle fatigue behaviour
TL;DR: In this article, the role of laser shock processing (LSP) on the cyclic properties of A356, Al12Si and 7075 aluminium alloys was evaluated, and major contributors to the fatigue performance improvements were investigated in order to determine the optimum shock conditions.
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On the influence of mechanical surface treatments—deep rolling and laser shock peening—on the fatigue behavior of Ti–6Al–4V at ambient and elevated temperatures
TL;DR: In this paper, the effect of DR on the low-cycle fatigue (LCF) and high cycle fatigue (HCF) behavior of a Ti-6Al-4V alloy is examined, with particular emphasis on the thermal and mechanical stability of the residual stress states and the near-surface microstructures.
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Laser shock processing : a review of the physics and applications
TL;DR: In this paper, the authors provide an exhaustive account of current trends concerning the physics, the mechanics and the applications involved in laser shock processing (LSP) and present some general and specific data regarding the physical principles of laser shock.
503
Surface nanocrystallization of 316L stainless steel induced by ultrasonic shot peening
TL;DR: In this article, a new technique was introduced to realize surface nanocrystallization (i.e., generation of a surface layer of nanostructures) on a 316L stainless steel by means of ultrasonic shot peening treatment.
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