Single-atomic-layer-height disconnections that connect with I1stacking faults are produced on{1011}twin boundaries in pure magnesium through transmutation of basalmixed dislocations across the twin boundaries,and thei...Single-atomic-layer-height disconnections that connect with I1stacking faults are produced on{1011}twin boundaries in pure magnesium through transmutation of basalmixed dislocations across the twin boundaries,and their stabilities are examined using molecular dynamics simulations.The stable configuration for a single-atomic-layer-height disconnection is a pyramidal-basal(PyB)disconnection connecting an I1fault associated with a stacking sequence change of ABACA,or a basal-pyramidal(BPy)disconnection connecting an I_(1)fault associated with a stacking sequence change of BABCB.A stable single-atomic-layer-height disconnection can transform to a less stable single-atomiclayer-height disconnection when its step orientation changes solely.A stable single-atomic-layer-height disconnection can also transform to another stable single-atomic-layer-height disconnection,when the step orientation of the disconnection and the type of the I_(1)fault that connects with the disconnection change synchronously,and this process is accompanied with the emission of a Shockley partial dislocation from the twin boundary.展开更多
文摘Single-atomic-layer-height disconnections that connect with I1stacking faults are produced on{1011}twin boundaries in pure magnesium through transmutation of basalmixed dislocations across the twin boundaries,and their stabilities are examined using molecular dynamics simulations.The stable configuration for a single-atomic-layer-height disconnection is a pyramidal-basal(PyB)disconnection connecting an I1fault associated with a stacking sequence change of ABACA,or a basal-pyramidal(BPy)disconnection connecting an I_(1)fault associated with a stacking sequence change of BABCB.A stable single-atomic-layer-height disconnection can transform to a less stable single-atomiclayer-height disconnection when its step orientation changes solely.A stable single-atomic-layer-height disconnection can also transform to another stable single-atomic-layer-height disconnection,when the step orientation of the disconnection and the type of the I_(1)fault that connects with the disconnection change synchronously,and this process is accompanied with the emission of a Shockley partial dislocation from the twin boundary.
