期刊名称：International Journal of Innovative Research in Science, Engineering and Technology
印刷版ISSN：2347-6710
电子版ISSN：2319-8753
出版年度：2017
卷号：6
期号：3
页码：4909
DOI：10.15680/IJIRSET.2017.0603288
出版社：S&S Publications
摘要：Shot peening has been used to improve the fatigue properties of a variety of metals.Shot peening is amechanical surface treatment that introduces a roughened surface, a compressive surface layer, and increaseddislocation density near the surface and also shot peening is a cold working process in which the surface of a part isbombarded with small spherical media called shot. Each piece of shot striking the metal acts as a tiny peening hammer,imparting a small indentation or dimple on the surface. In order for the dimple to be created, the surface layer of themetal must yield in tensionbelow the surface; the compressed grains try to restore the surface to its original shape,producing a hemisphere of cold-worked metal highly stressed in compression. Overlapping Dimples develop a uniformlayer of residual compressive stress and increase the fatigue strength of the material.
