Atomistic study of ⅓〈1123〉{1011} dislocations in h.cp. crystals. II. Motion of the dislocations
- 1 November 1990
- journal article
- research article
- Published by Taylor & Francis in Philosophical Magazine A
- Vol. 62 (5) , 545-556
- https://doi.org/10.1080/01418619008244918
Abstract
The effect of shear stress on three ⅓〈1 123〉 dislocations on {1011} planes in h.c.p. crystals has been investigated by computer simulation using a truncated Lennard-Jones potential. An edge dislocation and a 30° mixed dislocation glide on the (1011) plane relatively easily. Three types of 105° dislocations are different in their behaviour under the applied stresses. A dislocation with a planar core (type I) moves at a comparable stress to the above ones, whereas larger stresses are required for the other two; a dislocation with a nonplanar core configuration (type II) begins to move after transformation to a planar, glissile configuration (type I), and a dislocation with another nonplanar configuration (type III) is sessile. The result is discussed and compared with experimental observations.Keywords
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