Mapping Anisotropy and Triaxiality Effects in Magnesium Alloys

Abstract

Microstructure, material properties, and macroscopic stress state closely interact in determining the strength and fracture resistance of ductile metals. While a fair understanding of the microstructure-stress interaction on strength, deformation stability, and damage has been achieved for common engineering alloys, the same is not true for magnesium (Mg) alloys. A fundamental understanding of how the net plastic anisotropy influences the macroscopic load-deformation characteristics and deformation stability will potentially aid the development of high-performance Mg alloys. A concerted multi-scale computational effort is essential in providing a deeper understanding of the deformation micromechanics of Mg alloys. In this paper, we investigate the microstructure-property linkages under tensile and compressive loading states through high-fidelity crystal plasticity modeling and simulation. Extended investigations along this path should enable the development of guidelines for damage-tolerant design of Mg alloys.