Abstract
In this paper, the generation of plastic regions in work surface layers in the indenting process is discussed analytically and experimentally, in order to optimize the process conditions to produce the desired residual stress of a blast process. Work surfaces were covered with a large number of uniform dimples at a regular pitch, formed as 20μm in spherical radius, on annealed 0.5% carbon steel. The results demonstrated that the depth of a plastic region and the strain of polycrystals in a work surface layer using the blast process can be estimated according to those in the indenting process. The maximum depth of plastic regions in the FEM analysis is similar to the both processes.
