3331 Molecular Dynamics Study on Influence of Processing Condition of Equal Channel Angular Pressing on Grain Refinement Behavior of α-Fe

Abstract

A series of molecular dynamics (MD) simulations of severe simple-shear deformations, which are ideally equivalent to SPD applied by typical processing routes of Equal Channel Angular Pressing (ECAP), is performed using three-dimensional models with periodic-boundary condition. We analyze the influence of initial grain size on the microstructural evolution. In the result, it is apparent that defects are introduced into grain efficiently in case of large grain size.