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

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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.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, The University of Liverpool, L69 3BX, Liverpool, UK

    R. C. Pond (Reader) & D. J. Bacon (Professor)

  2. Department de Matematica Aplicada, 3, Universität Politecnica de Catalunya, 08034, Barcelona, Spain

    A. Serra (Lecturer)

  3. Department of Metallurgy and Science of Materials, University of Oxford, OX1 3PH, Oxford, UK

    A. P. Sutton (Royal Society Research Fellow)

Authors
  1. R. C. Pond
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  2. D. J. Bacon
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  3. A. Serra
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  4. A. P. Sutton
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Additional information

This paper is based on a presentation made in the symposium “The Role of Ledges in Phase Transformations” presented as part of the 1989 Fall Meeting of TMS-MSD, October 1–5, 1989, in Indianapolis, IN, under the auspices of the Phase Transformations Committee of the Materials Science Division, ASM INTERNATIONAL.

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Pond, R.C., Bacon, D.J., Serra, A. et al. The crystallography and atomic structure of line defects in twin boundaries in hexagonal-close-packed metals. Metall Trans A 22, 1185–1196 (1991). https://doi.org/10.1007/BF02660650

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