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Showing 1 to 11 of 11 for “"Laser Shock Peening"”.
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Experimental Characterization and Finite Element Simulation of Laser Shock Peening Induced Surface Residual Stresses using Nanoindentation
… measuring the surface residual stress induced by laser shock peening. While the technique has been studied by a number of groups, accurate measurement using nanoindentation is hindered by a good method of estimating the contact area, which is the basis of all the calculations in the literature. …
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Effects of Laser Shock Peening on Residual Stress, Texture and Deformation Microstructure of Ti-6Al-4V Alloy
Laser shock peening (LSP) is a novel surface treatment process that generates deep compressive residual stresses and microstructural changes and thereby dramatically improves fatigue strength of critical metal aircraft engine parts. In the past, researchers have evaluated the mechanical effects of …
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The effect of laser shock peening and shot peening on the fatigue performance of aluminium alloy 7075
… components, through various means including shot peening and laser shock peening, can result in local residual compressive stresses which provide a resistance to both crack initiation and propagation, thus leading to an increase in the fatigue life of the components. The effects of both laser …
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A Study of the Effects of Laser Shock Peening on Residual Stress, Microstructure and Local Properties of IN718 Ni-Base Superalloy
<p>In this project effects of Laser shock peening (LSP) on two aero engine alloys, IN718 and IN718 SPF were studied. The primary goal of the program was to secure required fundamental knowledge of e impact of LSP process parameters on these two aero engine alloys and thereby advance the science and …
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The Effects of Laser Shock Peening on the Residual Stress and Corrosion Characteristics of Magnesium Alloy AZ91D for use as Biodegradable Implants
… of compressive residual stress on a material is Laser Shock Peening (LSP). Laser Shock Peening is a material process in which a high-pulsed laser creates a pressure shock wave that travels through the depth of the material, leaving high levels of compressive residual stress through its depth.This …
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The Role of Twinning in the Plastic Deformation of Alpha Phase Titanium
… to cause deformation twinning: metallic shot peening, laser shock peening and deep cold rolling. The results presented in this thesis have furthered the understanding of the role of deformation twinning in the plastic deformation of α-phase titanium. Key findings of the research include the …
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Understanding the Structure-property Relationships of Solid-state Additively Manufactured Stainless-steel Coatings
… influence of friction stir processing (FSP) and laser shock peening (LSP) post-surface treatments on the degradation resistance of CS 316L SS was investigated. By exploring these mechanisms, a useful roadmap for robust CS 316L SS development can be realized, which can control their inevitable …
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Effects of Chemical and Structural Heterogeneity on the Tribocorrosion Resistance of Metals in Aqueous Solutions
… system, the surface was treated by femtosecond laser shock peening (fs-LSP) technique with ultra-low pulse energy to introduce structural heterogeneity. Treatment conditions (e.g., power density, direct ablation and confined ablation) significantly affected the ultimate peening effect and …
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High Cycle Fatigue Simulation using Extended Space-Time Finite Element Method Coupled with Continuum Damage Mechanics
… and structures. Surface treatments such as laser shock peening (LSP), ultrasonic nanocrystal surface modification (UNSM) and many others introduce significant residual stresses in the material, which drastically affects the fatigue life. Motivated by the need for effectively incorporating …
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A Study of Thermal Stability of Residual Stresses and Fatigue life of Laser Shock Peened Ti-6Al-2Sn-4Zr-2Mo alloy
<p>This is a study of the effects of laser shock peening (LSP) on residual stress generation, thermal stability of the LSP induced residual stresses and the associated fatigue strength enhancement in the temperature range of (315°C-538°C;600°F-1000°F) the aerospace alloy Ti-6Al-2Sn-4Zr-2Mo …
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Ablation and Plasma Effects during Nanosecond Laser Matter Interaction in Air and Water
… research work, a clear understanding of laser matter interaction in