Hostname: page-component-77c89778f8-9q27g Total loading time: 0 Render date: 2024-07-17T16:33:11.950Z Has data issue: false hasContentIssue false
  • English
  • Français

Dislocation Core Structures in Nial.

Published online by Cambridge University Press:  28 February 2011

R. Pasianot  and
D. Farkas
R. Pasianot
Affiliation:
Department of Materials Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061
D. Farkas
Affiliation:
Department of Materials Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061
Get access

Abstract

Since the early studies on bcc materials, computer simulation of dislocation core structures has been recognized as a valid means of understanding yield behavior with temperature. Many of today's high temperature ordered alloys do have yield anomalies and computer simulation of core structures is a basic ingredient in the corrent theories for the anomalous yield behavior in Ll2 alloys. In the case of B2 type alloys there are very few of these studies. The present work deals with computer simulation of core structures in B2 NiAl. An embedded atom type potential is used to simulate interactions and several slip systems are considered, particularly those having [100] and [111] slip vcctors that are the experimentally observed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 186: Symposium I – Alloy Phase Stability and Design , 1990 , 259
Copyright
Copyright © Materials Research Society 1991

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. Paidar, V., Pope, D.P. and Vitek, V.. Acta Metall. 32(3), 435. (1984).Google Scholar
2. Yamaguchi, M., Paidar, V., Pope, D. P.. Vitek, V.. Phil. Mag. A45(5), 867, (1982).Google Scholar
3. Vitek, V., Crystal ILattice Dcfccts, 5, 1, (1974). A41,I541, (1980).Google Scholar
4. Umakoshi, Y., Yamaguchi, M., Acta Merall. 241., (1976,) and Scripta Metall. 11, 211, (1977).Google Scholar
5. Ball, A. and Smallman, R. E., Acta Metall. 14, 1349. (1966).Google Scholar
6. Mendirata, M. G., Kim, H. M., Lipsitt, H. A., Mcall. Trans. A(15),395, (1984).Google Scholar
7. Loretto, M. H. and Wasilewski, R. J., Phil. Mag. 23, 1311, (1971).Google Scholar
8. Munroe, P. R., Baker, I., Scripta Mctall. 23 495. (1989).Google Scholar
9. Voter, A. F., Chen, S. P., MRS Symp. Proc. 82, 175. (1987).Google Scholar
10. Smialek, J. I. and Ilehemann, R. F., Metall. Transactions, 4, 1571, (1973).Google Scholar
11. Campany, R. G., Loretto, M. H., and Smallain, R. F.. Journal of Microscopy, 98, 174, (1973).Google Scholar
12. Freeman, A. J. and Hong, T., in “Atomistic Sirotlation of Materials”, pag. 41, Ed. by Vitek, V. and Srolovitz, D.J. Plenum Press.N.Y. (1089).Google Scholar
13. Voter, A. F., private communication.Google Scholar
14. Farkas, D., Savino, E. J., Scripta Metall. 22, 557. (1988).Google Scholar
15. Yaney, D. L., Pelton, A. R., Nix, W. D.. Journ. Mat. Sci. 21, 2083, (1986).Google Scholar
16. Takeuchi, S., Phil. Mag. A 41(4), 511. (1980).Google Scholar