Abstract
To evaluate the evolution of deformation twins in cast magnesium alloy AZ31, EBSD observation was performed during intermittent four-point bending testing. First, to estimate the strain from the stroke of the testing machine, the strain at the surface of tensile side was measured by using a strain gauge. From the EBSD analysis, the evolution of deformation twins was visualized. The result shows that total length of twin boundaries increases with the increase in the plastic strain. The relationship between the distribution of twins and Schmid factor for tensile direction indicates that twin regions evolve even in the grains with higher Schmid factor for basal slip system than that for twin system.
