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 effect of peening on the fatigue crack growth performance of friction stir-welded 7075 aluminum alloy was investigated, and the results indicated a significant reduction in fatigue cracks using laser peening compared to shot peening.
Abstract: The effect of peening on the fatigue crack growth performance of friction stir-welded 7075 aluminum alloy was investigated. The fatigue crack growth rates were assessed for laser- and shot-peening conditions at stress ratios (R) of 0.1 and 0.7. The surface and through thickness residual stress distributions were characterized for the different regions in the weld. The results indicate a significant reduction in fatigue crack growth rates using laser peening compared to shot peening and the as-welded condition. The effect of the compressive stresses obtained through laser peening was deemed responsible for increasing the resistance to fatigue crack growth of the welds.
27 citations
TL;DR: In this paper, a gradient twin microstructure in which the density of twins decreases with depth was introduced to an AZ31B Mg alloy plate by laser shock peening and sliding tests were performed on surfaces with varying twin volume fraction (TVF) under dry condition.
27 citations
TL;DR: In this article, the effects of laser shock peening (LSP) on the residual stress distribution and variation in surface roughness and its correlation to the resulting high-cycle fatigue properties of a treated nickel aluminium bronze (NAB) alloy were investigated.
27 citations
Journal Article•
TL;DR: An experimental investigation of the feasibility of using eddy current technology to non-destructively determine the residual stresses induced by shot peening in Ti-6Al-4V plate was undertaken as discussed by the authors.
Abstract: An experimental investigation of the feasibility of using eddy current technology to nondestructively determine the residual stresses induced by shot peening in Ti-6Al-4V plate was undertaken. Because of the extremely small magnitude of the shot peening-induced conductivity changes, strict noise control was vital and was achieved by mechanical and thermal isolation of the apparatus. This was accomplished by modifying the instrument to improve temperature isolation of several key internal components and also by physically and electronically isolating the experimental apparatus. Results indicate that residual stress can be clearly determined for material shot peened to a depth of 0.3 mm (0.012 in.) or more with an experimental variation of less than 3 ppm.
27 citations
TL;DR: In this article, an existing elasto-plastic model that includes phase transformation is extended to capture the rate dependency of plastic deformation during laser shock peening, and the influence of temperature, laser pulse duration and laser intensity on the residual state is studied.
27 citations