Understanding Twinning-Detwinning Behavior of Unalloyed Mg During Low-Cycle Fatigue Using High Energy X-ray Diffraction

摘要

It is well understood that twinning during deformation plays an important role in deformation of Mg and its alloys [1-8]. In hexagonal close packed (HCP) Mg alloys, the dominant deformation mode at room temperature is slip on the basal (0001) plane Mg [9, 10]. The other slip systems-prismatic slip, pyramidal slip, and pyramidal slip-require much higher stresses to activate during deformation [11], Mechanical twinning allows for grains to easily deform along their c-axis [12] and has been the focus of significant, active research [e.g., 13-23].