Topic
Peening
About: Peening is a research topic. Over the lifetime, 5538 publications have been published within this topic receiving 73073 citations.
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TL;DR: Laser peening without protective coating (LPwC) is an advanced mechanical surface modification method being used for a wide range of metallic materials for improving their fatigue and corrosion properties.
Abstract: Laser peening without protective coating (LPwC) is an advanced mechanical surface modification method being used for a wide range of metallic materials for improving their fatigue and corrosion properties. The literature review of LPwC for the last two decades is systematically presented. The mechanism and experimental parameters of LPwC are described comprehensively. The major factors that influence the fatigue or corrosion properties, for example, compressive residual stress (CRS) and surface roughness, are analyzed with great care using the available data from the literature. A list of suggestions for future work in LPwC is given at the end.
53 citations
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13 Jun 2018-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this paper, the microstructure evolution in laser shock peened pure nickel was investigated by using X-ray diffraction, scanning electron microscopy (SEM), electron backscatter diffraction (EBSD), and transmission electron microscope (TEM).
Abstract: This paper investigates microstructure evolution in laser shock peened pure nickel. The microstructure of the deformed layer produced by laser shock peening (LSP) was systematically characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM). Results indicated that the amplitude and depth of micro-hardness in the surface layer increased with the number of laser impacts. A nanocrystalline layer was prepared in pure Ni after LSP and the LSP induced microstructures included dislocations (Ds), ultra-fine laminates (UFLs), ultra-fine grains (UFGs), nano-laminates (NLs), and nano-grains (NGs). Based on the in-depth microstructure observations, a grain refinement mechanism induced by LSP in pure Ni was proposed. The strengthening mechanism of micro-hardness induced by LSP could be attributed to the barriers of dislocation motion, including low-angle grain boundaries, large-angle grain boundaries and dislocation multiplication.
53 citations
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TL;DR: In this article, the long-term fatigue tests on shot peened helical compression springs were conducted by means of a special spring fatigue testing machine at 40-Hz at different stress levels.
53 citations
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TL;DR: In this article, a displacement controlled plane bending fatigue test was performed on shot peened and cavitation peened stainless steel SUS316 L samples, and the fatigue properties of the samples were evaluated using a fatigue test.
53 citations
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TL;DR: In this article, a laser peening experiment was conducted to investigate the fatigue life of Ti17 titanium alloy by using Nd:YAG laser system with the pulse-width of 15 ns and max pulse-energy of 7 J.
53 citations