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Peierls-Nabarro model of non-planar screw dislocation cores

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Czechoslovak Journal of Physics B Aims and scope

Abstract

The Peierls-Nabarro model originally developed for dislocations with planar cores is modified to describe the cores of screw dislocations extended along two or three intersecting slip planes, under the action of external stress. This concept generalizes the simplified concept of sessile splitting of screw dislocations into singular partials and enables an instructive interpretation of fully atomistic models of screw dislocation cores developed recently for b.c.c. metals. As an example, a numerical solution of the modified Peierls-Nabarro equation is given for the equilibrium configuration of a 1/2 [111] screw dislocation core in α-Fe extended along three {110} planes.

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Authors and Affiliations

  1. Institute of Physics, Czechosl. Acad. Sci., Prague, Na Slovance 2, 180 40, Praha 8, Czechoslovakia

    L. Lejček & F. Kroupa

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  1. L. Lejček
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  2. F. Kroupa
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Lejček, L., Kroupa, F. Peierls-Nabarro model of non-planar screw dislocation cores. Czech J Phys 26, 528–537 (1976). https://doi.org/10.1007/BF01586885

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  • DOI: https://doi.org/10.1007/BF01586885

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