Study on the influence of shot material and diameter on residual stress and roughness of shot-peened 7075 aluminum alloy
ZHOU Jingjing
KONG Qingdong
LIU Xiangbo
DAI Hao
LONG Xianglin
WANG Meng
WEI Yanhong
Abstract：[Objective]Shot peening technology is usually used in aircraft lightweight manufacturing to improve the performance of aluminum alloys,but the current numerical simulation of shot peening residual stress is mostly based on the random distribution model of the shot,and there are fewer studies on the roughness of the target material after shot peening with different shot material.It is necessary to conduct research on this issue.[Methods]A shot probability random distribution finite element model was established to carry out numerical simulation of shot peening,and studied the effects of different shot material and shots diameter on the residual stress field and surface roughness of 7075-T651 aluminum alloy targets after shot peening.[Results]The results show that with the same shot peening parameters,the depth of compressive stress layer of cast steel shot,glass shot and ceramic shot are respectively reduced.As the shot diameter increases from 0.3 mm to 0.58 mm,the maximum residual compressive stress increases from 559 MPa to 641 MPa.When the shot diameter is 0.71 mm,the residual compressive stress increases significantly slow down.As the ceramic shot diameter decreases from 0.71 mm to 0.3 mm,the surface roughness RZ decreases from 22.6 μm to 5.1 μm,and the stress concentration factor Kt decreases from 1.368 3 to 1.166 7.
Keywords：Shot peening7075-T651 aluminum alloyNumerical simulationSurface roughnessResidual stressShot probability random distribution model
Publication Date：2026-03-15
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：7( 152-158 )