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: In this paper, the axial fatigue strength of EN45A spring steel specimen is evaluated experimentally as a function of shot peening in the conditions used for full-scale leaf springs testing in industries.
68 citations
TL;DR: The main positive effects of machine hammer peening are the induction of compressive residual stresses, the hardness increase of the upper surface layer and a reduction of surface roughness up to mirror-like surfaces as discussed by the authors.
68 citations
TL;DR: In this article, the effects of the shot peening process (surface roughening, strain hardening and compressive residual stresses) and how the magnitude of these effects can be determined both experimentally and numerically are reviewed.
Abstract: Shot peening is a well known process applied to components in order to improve their fatigue resistance. In recent years, there has been an increasing interest in including the effects of the shot peening process in life assessment models since this would allow a reduction in conservatism compared to those in current application. The present paper seeks to review firstly the effects of the shot peening process (surface roughening, strain hardening and compressive residual stresses) and how the magnitude of these effects can be determined both experimentally and numerically. The reasons for the beneficial effect of shot peening on fatigue resistance are reviewed; this includes consideration of how different operating conditions can affect the magnitude of the benefit. The second part of the review details the life assessment approaches which have been developed to date incorporating these effects and seeks to identify the areas in which further development is still required before the models can be...
68 citations
TL;DR: In this article, the influence of an excimer laser with varying fluence on the fretting behavior of Ti-6Al-4V was carried out, which resulted in an increase in hardness by 28% in air and 35% in water confining media, respectively.
67 citations
TL;DR: In this article, the authors applied the finite element method to predict the distribution of residual stresses along the surface and depth of thin sections of a Ti-6Al-4V alloy in single and multiple LSP.
Abstract: Laser shock peening (LSP) is a fatigue enhancement surface treatment for metallic materials. The key beneficial characteristic of LSP is the presence of compressive residual stresses mechanically produced by shock waves within the metallic materials, which can significantly improve their fatigue life and fatigue strength. During LSP, a laser beam can be directed to impact on either one side or two sides of a target. Generally, when treating a thin section, two sided peening is used to avoid harmful effects such as spalling and fracture, which may occur when only one side of a thin section is laser peened. The present work focuses on applying the finite element method to predict the distribution of residual stresses along the surface and depth of thin sections of a Ti-6Al-4V alloy in single and multiple LSP. In order to understand the effects of the target geometry on the distribution of residual stresses, the residual stress profiles corresponding to various target thicknesses were carefully evalu...
67 citations