Deformation banding in single crystal with predominant activity of basal slip system

Abstract

Kink and slip type deformation bands are frequently formed during plastic deformation in Mg-based long-period stacking ordered (LPSO) structure. In this study, kink band formation process in LPSO structure subjected to uniaxial loading was numerically investigated by means of a crystal plasticity finite element method. The numerical results exhibited that kink type deformation bands were formed during both tensile and compressive loadings whereas stress-strain behavior and morphology of band shapes were significantly different depending on loading direction. Influence of initial crystal orientation, material parameters, and boundary conditions on development of kink bands were also studied.