Insights from crystal-plasticity-based predictions on deformation of an Mg-10Gd extrudate

Abstract

Abstract. The mechanical behaviour of an extruded magnesium alloy was quantified in tension and compression along the extrusion direction. With the aid of EBSD measurements the material symmetry was examined, and discrete grain orientations were used to predict the multiaxial plastic behaviour along orientations perpendicular to the extrusion direction by means of the EVPSC formalism. It was found that the material is transversely isotropic, shows a small amount of distortional hardening and modest differences in hardening between the extrusion direction and the tangential direction. A phenomenological plasticity law was calibrated based on the predictions, which allowed performing the finite-element analysis of the expansion process of a vascular stent.