Investigation On The Microstructure In Shot-peening Surface Straining Layer Of Materials

Author:  R. Wang, Y. Tan, X. Li, M. Yan
Source:  Conf Proc: ICSP-1, (p.185-192)
Doc ID:  1981039
Year of Publication:  1981
Abstract:  
The microstructure in shot-peening surface plastic straining layer of several metals are investigated. It was found that this plastic deformation is not the same as the simple monotonic plastic deformation. As a result of cyclic plast ic deformation, material in the surface layer is subjected to "cyclic hardening" or "cyclic softening" as it occurs in the strain fatigue test. The appearance of cyclic hardening or cyclic softening is dependent on the initial microstructure of the material. Descriptors: Shot-peening; Fatigue (materials); Cyclic softening and hardening; Microhardness; Breadth of diffraction line; Subgrain; Lattice distortion.