{10(1)over-bar2} twin-twin intersection-induced lattice rotation and dynamic recrystallization in Mg-6Al-3Sn-2Zn alloy

This study investigated the formation mechanism of new grains due to twin-twin intersections in a coarse-grained Mg-6Al-3Sn-2Zn alloy during different strain rates of an isothermal compression. The results of electron backscattered diffraction investigations showed that the activated twins were primarily {101<overline>2} tension twins, and 60 degrees <101<overline>0> boundaries formed due to twin-twin intersections under different strain rates. Isolated twin variants with 60 degrees <101<overline>0> boundaries transformed into new grains through lattice rotations at a low strain rate (0.01 s(-1)). At a high strain rate (10 s(-1)), the regions surrounded by subgrain boundaries through high-density dislocation arrangement and the 60 degrees <101<overline>0> boundaries transformed into new grains via dynamic recrystallization. (c) 2022 Chongqing University. Publishing services provided by Elsevier B.V. on behalf of KeAi Communications Co. Ltd. This is an open access article under the CC BY-NC-ND license ( http://creativecommons.org/licenses/by-nc-nd/4.0/ ) Peer review under responsibility of Chongqing University