Article ID Journal Published Year Pages File Type
9796075 Materials Science and Engineering: A 2005 5 Pages PDF
Abstract
Atomic-scale details of the interaction of a 1/3112¯0(0001) edge dislocation, which dissociates in the basal plane, with four typical vacancy and self-interstitial atom (SIA) clusters created by displacement cascades in α-zirconium are investigated by computer modelling. A triangular cluster of SIAs lying within a basal atomic plane adjacent to the dislocation glide plane is not absorbed by the dislocation but is pushed along by the leading partial. A 3-D SIA cluster lying across the glide plane is completely absorbed by the dislocation by creation of two super-jogs. The dislocation also climbs by interaction with a prismatic vacancy cluster, but only half of the vacancies are absorbed in this case. For a cluster formed from a basal platelet of vacancies, the dislocation experiences a glide resistance, but both the line and cluster are fully restored after breakaway. Stress-strain curves and the critical stress for dislocation breakaway from a cluster are presented.
Related Topics
Physical Sciences and Engineering Materials Science Materials Science (General)
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