Hostname: page-component-586b7cd67f-dsjbd Total loading time: 0 Render date: 2024-11-25T15:29:57.394Z Has data issue: false hasContentIssue false
  • English
  • Français

A Peierls-Nabarro Model for Kink-Pair Generation in Screw Dislocations at Low Temperatures

Published online by Cambridge University Press:  10 February 2011

A.H.W. Ngan
A.H.W. Ngan*
Affiliation:
Department of Mechanical Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, P.R., China
Get access

Abstract

Kink-pair generation in three-fold screw dislocations in the bcc lattice is investigated within the framework of the generalised Peierls-Nabarro model. Using a piece-wise plane strain approximation, the apparent activation energy is predicted to vary with stress in a parabolic manner which is in good agreement with experimental findings.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 538: Symposium J – Multiscale Modelling of Materials , 1998 , 113
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.See, e.g. Suzuki, T., Koizumi, H. and Kirchner, H.O.K., Acta Metall. Mater., 43, 2177 (1995) and references therein.Google Scholar
2. Ngan, A.H.W., Phil. Mag. Lett., 72, p. 207 (1995).Google Scholar
3. Ngan, A.H.W., J. Mech. Phys. Solids, 45, p. 903 (1997).Google Scholar
4. Ngan, A.H.W., to appear in Phil. Mag. A.Google Scholar
5. Duesbury, M.S., and Vitek, V., Acta Mater., 46, 1481 (1998).Google Scholar
6. Ngan, A.H.W. in Strength Theory: Application, Development & Prospects for 21st Century, edited by Yu, M.H. and Fan, S.C. (Science Press, Beijing China 1998), p. 151–156.Google Scholar
7. Duesbury, M.S., Acta Metall., 31, 1747 (1983).Google Scholar
8. Suzuki, T., Takeuchi, S. and Yoshinaga, H., Dislocation Dynamics and Plasticity, Springer-Verlag Berlin Heidelberg, 1991, Chp. 6.Google Scholar
9. Vitek, V., Crystal Lattice Defects, 5, 1 (1974).Google Scholar