Stability of single-atomic-layer-height disconnections on (10(1)over- bar2) twin boundary in Mg

Y Yue and Y Zhang and JF Nie, SCRIPTA MATERIALIA, 209, 114407 (2022).

DOI: 10.1016/j.scriptamat.2021.114407

Four different configurations of single-atomic-layer-height disconnections on (10 (1) over bar2 ) twin boundary in magnesium are investigated using molecular dynamics simulations. It is found that a prismatic-basal (PB) single-atomic-layer-height disconnection is more stable than a basal-prismatic (BP) single-atomic-layer height disconnection when each of them is connected with an I-1 stacking fault associated with a stacking sequence change of BABCB. In contrast, a BP single-atomic-layer-height disconnection is more stable than a PB single-atomic-layer-height disconnection when each of them is connected with an I-1 fault associated with a stacking sequence change of ABACA. A stable BP (or PB) single-atomic-layer-height disconnection can transform to a stable PB (or BP) single-atomic-layer-height disconnection when its step orientation changes with a change in the lying plane of the connected I-1 fault. (C) 2021 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

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