On the Dislocation Properties of 60$^{\circ}$ Partial Dislocation in Silver: Core Structure and Peierls Stress
Year: 2010
Journal of Atomic and Molecular Sciences, Vol. 1 (2010), Iss. 2 : pp. 162–171
Abstract
Two-dimensional modified Peierls-Nabarro dislocation equation concerning the discreteness of crystals is reduced to one-dimensional equation to determined the core structure of partial dislocation in Ag. The generalized stacking fault energy along the Burgers vectors of partial dislocation is a skewed sinusoidal force law, which is related to the intrinsic stacking fault energy and the unstable stacking fault energy. A trial solution appropriate for arbitrary dislocation angle is presented within the variational method. The results show that the half core width increases as the increase of dislocation angle. Moreover, the core width decreases with the increase of the unstable stacking fault energy and the intrinsic stacking fault energy. Peierls stress for $60^{\circ}$ partial dislocation is in agreement with the experimental results.
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Journal Article Details
Publisher Name: Global Science Press
Language: English
DOI: https://doi.org/10.4208/jams.110709.112809a
Journal of Atomic and Molecular Sciences, Vol. 1 (2010), Iss. 2 : pp. 162–171
Published online: 2010-01
AMS Subject Headings: Global Science Press
Copyright: COPYRIGHT: © Global Science Press
Pages: 10
Keywords: core structure partial dislocation variational method Peierls stress.