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Metallurgical Transactions A

, Volume 22, Issue 6, pp 1185–1196 | Cite as

The crystallography and atomic structure of line defects in twin boundaries in hexagonal-close-packed metals

  • R. C. Pond
  • D. J. Bacon
  • A. Serra
  • A. P. Sutton
The Role of Ledges in Phase Transformations

Abstract

The crystallographic analysis of line defects in interfaces is discussed and applied to the particular case of twinning dislocations in hexagonal-close-packed (hop) metals, which have been studied here by atomistic simulation. Two crystallographic approaches are used; first, the concept of bicrystal structure maps is developed for the case of interfaces between crystals having multiple-atom bases, and second, the topological theory of line defects based on symmetry theory is used. On the basis of the atomistic calculations, some general conclusions concerning the relative contribution to the total energy of dislocations made by their elastic fields and core structures are presented.

Keywords

Metallurgical Transaction Burger Vector Twin Boundary Step Height Twin Interface 
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Copyright information

© The Minerals, Metals and Materials Society, and ASM International 1991

Authors and Affiliations

  • R. C. Pond
    • 1
  • D. J. Bacon
    • 1
  • A. Serra
    • 2
  • A. P. Sutton
    • 3
  1. 1.Department of Materials Science and EngineeringThe University of LiverpoolLiverpoolUK
  2. 2.Department de Matematica Aplicada, 3Universität Politecnica de CatalunyaBarcelonaSpain
  3. 3.Department of Metallurgy and Science of MaterialsUniversity of OxfordOxfordUK

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