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The effect of shear stress on the screw dislocation core in bcc metals
Authors:L. Lejček  F. Kroupa
Affiliation:(1) Institute of Physics, Czechosl. Acad. Sci., Prague, Na Slovance 2, 180 40 Praha 8, Czechoslovakia;(2) Present address: National Research Institute for Materials, Opletalova 25, 113 12 Praha 1
Abstract:The screw dislocation core structure in bcc metals under an external shear stress is investigated using the model of generalized splitting as an approximation of the Peierls-Nabarro model of screw dislocation dissociated on three {110} slip planes. The shear stress for which the core structure in this model is unstable is found.
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