{10-12} Twins across twin boundaries traced by in situ EBSD

In AZ31 magnesium alloy, {10-12} twin pair generated at grain boundary is easy to be observed. In current study, we trace the process of twins impacting grain boundaries and stimulating the nucleation of new twins in neighbouring grains by in situ electron backscatter diffraction (EBSD) technique. Multiple twin variants (caused by twin pair) inside one grain is found in EBSD map, which is considered as the cause of strain hardening for it significantly retard the rate of propagation and growth of twinning during subsequent deformation. (C) 2016 Elsevier B.V. All rights reserved.