Evaluation of the Effects in Fine Particle Peening on Surface Modification

Author:  K. Nambu, Y. Shimizu
Source:  Conf Proc 2014: ICSP-12 Goslar, Germany (pgs.348-352)
Doc ID:  2014101
Year of Publication:  2014
Abstract:  
The purpose of this research is to determine the role that fine particle peening (FPP) has on surface modification. The single particle collision was used for various processing conditions with the finite element method (FEM). This collision simulation can reproduce various processing conditions by changing various kinds of parameters. This method is suitable for studying various influencing factors. LS-DYNA was used for this simulation. As target material to be shot peened, steel was used and as shot media, steel shot, Al₂O₃, ZrO₂, and Sn particles were utilized. In addition, analysis was conducted under the collision energy controlled condition. As a result, it was shown that the plastic strain produced at the time of collision depends on the yield stress ratio and the Young's modulus ratio of shot particles and the steel to be shot peened. It could be shown that the plastic deformation produced at the time of a collision depends on the yield stress ratio of the shot particles and the target material. The yield stress ratio and the Young's modulus ratio of the shot particles and the target material are the influencing factors of the surface modification by FPP.