抄録
In this study, the origin of amounts of localized strain in basal textured Magnesium alloy sheets was investigated. First, grid patterns were drawn on a top surface of sample by Focus Ion Beam system. And then, a distribution of crystal orientation from same area was observed by SEM/EBSD. From these methods, the relationship between the localized strain and crystal orientation was revealed. In generally, the amounts of strains are dependent on the crystal orientation, which means the facility of slip deformation. However, my results show that localized strain is dependent on the existence or absence of twins and twin types, and but not on the Schmid factor of basal slip. And I suggest that {1012} type has the roll of strain accommodation to satisfy the strain compatibility with neighbor grain in primary deformation stage and continue to cancel the strain of slip during deformation. So the grain with {10-12} type slightly deformed. On the other hand, {10-11} type has the roll of accommodation strain component to conform to externally applied stress. But {10-11} twin easily generate double twin. And the grain with double twin localized severely deformed and formed surface steps or cracks.
