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- W2078604230 abstract "To understand the deformation mechanism due to non-basal slip in hcp metals, the core structure of edge dislocation with Burgers vector (c+a) was investigated by molecular dynamics simulation using a Lennard-Jones type pair potential. A perfect (c+a) edge dislocation was introduced along [1100] direction at the center of the model crystal. In the case of [0001] tensile, a core structure of the (c+a) perfect edge dislocation (Type-A) changed into {1121} twin-like structure with increasing strain. The Type-A moves at the tensile stress of 6.8 GPa with twin structure. The (c+a) edge dislocation consisted with two partial dislocations (Type-B) moves along (1122) plane with increasing strain. The critical tensile stress of the Type-B was about 3.4 GPa. In the case of [0001] compression, although the both type of dislocations moved in the opposite direction as the Type-B, the critical stress in compression was smaller than that in the tensile. This explains how the mobility of (c+a) edge dislocations seen in our tensile tests depends on the direction of applied stress. A temperature dependence of the critical stress has been demonstrated, so that when the temperature was raised from 0 K to 30 K, the stress decreased rapidly in all case." @default.
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- W2078604230 date "2005-01-01" @default.
- W2078604230 modified "2023-09-26" @default.
- W2078604230 title "Molecular Dynamics Simulation of Core Structure of (c+a) Edge Dislocations in Slip Deformation of hcp Metals" @default.
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- W2078604230 doi "https://doi.org/10.2320/jinstmet.69.855" @default.
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