Hostname: page-component-8448b6f56d-jr42d Total loading time: 0 Render date: 2024-04-24T23:37:51.645Z Has data issue: false hasContentIssue false
  • English
  • Français

Dislocation Morphologies in TiB2/NiAl

Published online by Cambridge University Press:  21 February 2011

L. Wang  and
R. J. Arsenault
L. Wang
Affiliation:
Metallurgical Materials Laboratory, University of Maryland, College Park, Maryland 20742-2115
R. J. Arsenault
Affiliation:
Metallurgical Materials Laboratory, University of Maryland, College Park, Maryland 20742-2115
Get access

Abstract

The addition of 20 volume percent titanium diboride in particulate form (1-3 μm) to nickel aluminide (TiB2/NiAl) results in a twofold increase in the high temperature strength of NiAl. Theories that have been proposed to account for the high temperature strength of discontinuous reinforced metal matrix composites can not be adequately used as a basis to explain the observed strengthening.

An investigation was undertaken of NiAl, 10 V% TiB2/NiAl and 20 V% TiB2/NiAl in the annealed condition and after deformation, allowed to cool slowly. There is a low dislocation density in the annealed samples and the dislocation density did increase slightly as a result of deformation. However, deformation did produce some intriguing dislocation arrangements; for example, it was found that there was a high dislocation density within the TiB2 in the deformed higher volume fraction composites and the dislocation density within NiAl matrix was not uniform.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 194: Symposium R – Intermetallic Matrix Composites I , 1990 , 199
Copyright
Copyright © Materials Research Society 1990

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. Westbrook, J.H., J. Electrochem. Soc. 103 54, (1956).Google Scholar
2. Schulson, E.M. and Barker, D.R., Scripta Metall. 17 (1983) 519.Google Scholar
3. Misra, A.K., Thermodynamic Analysis of Compatibility of Several Reinforcement Materials with Beta Phase NiAl Alloys,” NASA Contractor Report 4871, 1988.Google Scholar
4. Taya, M. and Lilholt, L., to be published.Google Scholar
5. Hassenlet, J.H. and Nix, W., Acta. Metall. 25, 1491 (1977).Google Scholar
6. Blum, W. and Reppich, B., Creep Behavior of Crystalline Solids, edited by Wilshire, B. and Evans, R., (Pineridge Press, 1985) p. 85.Google Scholar
7. Wang, L. and Arsenault, R.J., to be published in Mater. Sci. Eng., 1990.Google Scholar
8. Humphreys, F.J. and Hirsch, P.B., Fourth Int. Conf, on Strength of Metals and Alloys 1, 204, (1976).Google Scholar
9. Kanne, W.R. Jr., Strutt, P.R. and Dodd, R.A., TMS of AIME, 245 (1969) 1259.Google Scholar
10. Arsenault, R.J., Mater. Sci. Eng. 6, 171 (1984).Google Scholar
11. Arsenault, R.J. and Taya, M., Acta Metall. 35, 652 (1987).Google Scholar
12. Vogelsang, M., Arsenault, R.J. and Fisher, R.M., Metall. Trans. 17A, 379 (1986).Google Scholar
13. Arsenault, R.J. and Wu, S.B., Mater. Sci. Eng. 96, 77 (1987).Google Scholar
14. Arsenault, R.J. and Shi, N., Mater. Sci. Eng. 81, 175 (1986).Google Scholar
15. Flom, Y. and Arsenault, R.J., Mater. Sci. Eng. 75, 151 (1985).Google Scholar
16. Flom, Y. and Arsenault, R.J., Mater. Sci. Eng. 22, 191 (1986).Google Scholar
17. Taya, M. and Arsenault, R.J., Scripta Metall. 21, 349 (1987).Google Scholar
18. Arsenault, R.J., J. Comp. Tech. Res. 10, 140 (1988).Google Scholar