Finite Element Simulation of Multi-Shots Shot Peening of 300M Stainless Steel

Few reports are currently available about the numerical simulation analysis of shot peening effectiveness involving both shot peening pressure and pill diameter. Therefore,the shot peening strengthening process of 300M stainless steel was numerically simulated with finite element software ABAQUS / Explicit. The shot peening of the steel was conducted under identical shot-peening pressure and kinetic energy while the other processing parameters were adjusted by varying pill diameter. Besides, the surface residual stress field curve,surface displacement curve in normal direction and surface equivalent plastic strain were compared.Results showed that residual compressive stress field was formed at a certain depth beneath the surface of the steel substrate under different shot peening parameters,and the shot peening intensity as well as the intensity of residual compressive stress field on steel surface rose with increasing pill diameter. In the meantime,when the same kinetic energy input was applied to the target steel,similar shot peening effectiveness was obtained under different shot peening parameters. The present research could provide reference for selecting various shot peening processes under the condition that the requirements for shot peening strengthening were the same.