Deformation of Heterogeneous Structures

Abstract

As previously discussed, plastic deformation occurs by dislocation sliding or twinning, driven by shear stress; however, dislocation sliding is predominant at room temperature for most metals with a few exceptions. As for the shear stress to induce the plastic deformation, known as the critical shear stress , its true magnitude is much lower than the theoretical value, with sliding facilitated by dislocations, on a single crystal level.