Hostname: page-component-586b7cd67f-l7hp2 Total loading time: 0 Render date: 2024-11-29T09:49:11.897Z Has data issue: false hasContentIssue false
  • English
  • Français

Primary and Secondary Grain Boundary Dislocations in Symmetric Tilt Grain Boundaries of Finite Length

Published online by Cambridge University Press:  10 February 2011

Annamalai Lakshmanan  and
Alexander H. King
Annamalai Lakshmanan
Affiliation:
Department of Materials Science and Engineering, State University of New York at Stony Brook, Stony Brook, NY 11794-2275, U. S. A.
Alexander H. King
Affiliation:
Department of Materials Science and Engineering, State University of New York at Stony Brook, Stony Brook, NY 11794-2275, U. S. A.
Get access

Abstract

Secondary grain boundary dislocations in large-angle grain boundaries (also called dsc-dislocations) can be described as local variations in the density of the primary (or lattice) dislocations that make up the boundary. We present a simple meso-scale simulation in which the interactions of primary dislocations with each other and with the crystal lattice produce secondary dislocations with smaller Burgers vectors and larger spacing. We use the model to explore the interactions of the primary and secondary defects with a free surface terminating the grain boundary, and demonstrate cases in which the primary dislocations dominate the interactions, forcing the secondary dislocations to increase their energy. Other cases are found, for which all of the dislocations can respond in such a way that their energy decreases. The creation of interfacial disclinations is also demonstrated.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 538: Symposium J – Multiscale Modelling of Materials , 1998 , 407
Copyright
Copyright © Materials Research Society 1999

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1. Burgers, J.M., Proc. Kon. Ned. Akad. V. Wet. Amsterdam 42, 293 (1939).Google Scholar
2. Read, W.T. and Shockley, W., Phys. Rev. 78, 275 (1950).Google Scholar
3. Washburn, J. and Parker, E.R., Trans. A.I.M.E. 194, 1076 (1952).Google Scholar
4. Turnbull, D. and Hoffman, R.E., Acta Metall. 2, 419 (1954).Google Scholar
5.For a thorough review, see Sutton, A.P. and Balluffi, R.W., Interfaces in Crystalline Materials, Oxford University Press, Oxford (1995).Google Scholar
6. Bollmann, W., Crystal Defects and Crystalline Interfaces, Springer, Berlin (1972).Google Scholar
7. Kvam, E.P. and Balluffi, R.W., Phil. Mag. A 56, 137 (1987).Google Scholar
8. Hermann, G., Gleiter, H. and Baero, G., Acta Metall. 24, 353 (1976).Google Scholar
9. Chan, S.W. and Balluffi, R.W., Acta Metall. 33, 1113 (1985); ibid. 34, 2191 (1986).Google Scholar
10. Allen, R.M. and Goodhew, P.J., Scripta Metall. 11, 37 (1977).Google Scholar
11. Pond, R.C. and Smith, D.A., Scripta Metall., 11, 77 (1977).Google Scholar
12. Bishop, G.H. and Chalmers, B., Scripta Metall., 2, 133 (1968).Google Scholar
13. Sutton, A.P. and Vitek, V., Phil. Trans. R. Soc. Lond A, 309, 1 (1983); ibid. 309, 37 (1983); ibid. 309, 55 (1983).Google Scholar