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The Motion of Screw Dislocations in a Model B.C.C. Sodium Lattice

  • Z. S. Basinski
  • M. S. Duesbery
  • R. Taylor

Abstract

The behavior of the screw dislocation core in the presence of an external uniaxial stress of varying sense and orientation has been examined for a bcc model lattice, using an effective ion-ion potential for sodium developed from first principles. The Peierls stress is strongly orientation-dependent, and has a minimum value of 0.0076G, where G is the shear modulus. The mechanism for dislocation movement can be planar or nonplanar, depending on the orientation of the applied stress, and can give rise to crystallographic slip on {110| or {112| planes or to noncrystallo-graphic slip.

Keywords

Screw Dislocation Uniaxial Stress Critical Shear Stress Dislocation Core Orientation Dependence 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Plenum Press, New York 1972

Authors and Affiliations

  • Z. S. Basinski
    • 1
  • M. S. Duesbery
    • 1
  • R. Taylor
    • 1
  1. 1.Division of PhysicsNational Research Council of CanadaOttawa 7Canada

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