Plasticity evolution of an aluminum-magnesium alloy under abrupt strain path changes

Abstract During the forming and manufacturing of engineering materials, plasticity behavior could be evolving significantly due to complex deformation history. Therefore, this study aims characterize evolution an aluminum-magnesium alloy under simple monotonic non-monotonic loading with abrupt strain path changes. Instead focusing only on one single stress state in first-step for most studies literature, current testing program investigates three states – uniaxial, plane-strain, biaxial tension combines them a second-step uniaxial along orthogonal initial direction. This combination generates stress–strain data quite large distributed spectrum terms Schmitt parameter. It is found that shows unique phenomenon lower yield strength at reloading compared cases coupled steady increase overshooting strains. as well hardening rate lasts till uniform therefore referred permanent hardening. The comprehensive delivered by new experimental further assist development material models in-depth understanding underlying mechanisms.