Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : October 08, 2016 - October 10, 2016
The influence of loading direction on microstructural development of rolled AZ31 magnesium alloy (average grain size: approximately 40μm) was investigated. Tension and compression test specimens were machined from rolled plate; loading axes were parallel (L-specimen) to and perpendicular (S-specimen) to the rolling direction. Mechanical anisotropy of both specimens were observed in stress-strain curves. Pseudoelastic behaviors were also observed in cyclic tension and compression loading-unloading and reloading stress-strain hysteresis curves. The large anelastic strains and work hardening coefficient were observed in compressive stress-strain hysteresis loops of the S-specimen. {10-12} deformation twins were observed uniformly as increasing plastic strain in compressive loading for the L-specimen. In contract, several different types of deformation twins were observed locally as increasing plastic strain in tensile loading for the L-specimen. The slips and deformation twins can play an important role in cyclic pseudoelastic behavior of polycrystalline magnesium alloy.
