Effect of shot peening on surface residual stress distribution of SiCp/2024Al

Abstract

SiCp/2024Al is used as a structural material for aerospace applications due to its isotropic mechanical properties, high specific stiffness and strength, and high wear resistance. Large residual tensile stress that may be present in the material may degrade its fatigue properties due to the large difference in thermal expansion coefficient between the matrix and reinforcement. Shot peening can effectively change the residual stress distribution of the material and improve its fatigue performance. The effect of multiparameter shot peening on the residual stress distribution of SiCp/2024Al is studied in this paper. A finite element model of SiCp/2024Al is established. Then, the residual stress distribution of SiCp/2024Al is studied under the influence of shot peening radius, speed, and angle. Related shot peening experiments are performed to verify the simulation. This study provides guidance on the application of shot peening technology to SiCp/2024Al.