Numerical Study of Mechanical Response of Pure Titanium during Shot Peening

International Conference on Smart Engineering Materials 2018

Wang, Y.M.^1 ; Cheng, J.P.^1 ; Yang, H.P.^1 ; Zhang, C.H.^1

School of Metallurgical Engineering, Xi'An University of Architecture and Technology, Xi'an

710055, China^1

关键词: Biaxial residual stress;    Maximum shear stress;    Mechanical response;    Pure titaniums;    Residual strains;    Stress and strain;    Subsurface layer;    Surface layers;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/362/1/012009/pdf
DOI  :  10.1088/1757-899X/362/1/012009

来源: IOP

【 摘 要 】

Mechanical response of pure titanium impacted by a steel ball was simulated using finite element method to investigate stress and strain evolution during shot peening. It is indicated that biaxial residual stress was obtained in the surface layer while in the interior triaxial residual stress existed because the S33 was comparable to S11 and S22. With decreasing the depth from the top surface, the stress was higher during impacting, but the stress relief extent became more significant when the ball rebounded. Therefore the maximum residual stress was formed in the subsurface layer with depth of 130 μm. As for the residual strain, it is shown that the maximum residual strain LE33 was obtained at the depth of 60 μm corresponding to the maximum shear stress during impacting.