| Abstract Scope |
The deformation behavior of rolled AZ31B magnesium alloy was experimentally investigated under three different loading modes: uniaxial tension, uniaxial compression, and free-end torsion. The tension and torsion specimens are cut along the normal direction of the rolled plate, while the compression specimens are cut along the rolling direction. The microstructure evolution of the material was examined by means of electron backscattered diffraction (EBSD), using companion specimens. The results show that compression evaluates the highest equivalent fracture stress and plastic strain hardening rate, following by tension, and torsion. Under compression, {10-12} twinning is dominated by single or double variants within a grain, while, under tension, multiple variants are activated, inducing substantial twin-twin interactions. Under torsion, {10-12} twinning is limited due to a significant fraction of the grains with negative resolved shear stress on the {10-12} planes. The role of twinning and slip mechanisms on the deformation of AZ31B are discussed. |