Hostname: page-component-745bb68f8f-l4dxg Total loading time: 0 Render date: 2025-01-12T09:57:34.341Z Has data issue: false hasContentIssue false
  • English
  • Français

Effects of a pre-anneal on the mechanical properties of γ-TiAl

Published online by Cambridge University Press:  21 March 2011

Fabienne Grégori ,
Philippe Penhoud  and
Patrick Veyssière
Fabienne Grégori
Affiliation:
LEM, CNRS-ONERA, BP 72, 92322 Châtillon cedex, France.
Philippe Penhoud
Affiliation:
LEM, CNRS-ONERA, BP 72, 92322 Châtillon cedex, France.
Patrick Veyssière
Affiliation:
LEM, CNRS-ONERA, BP 72, 92322 Châtillon cedex, France.
Get access

Abstract

The temperature, TP, and the stress, σP, at which the yield stress of γ-TiAl alloys peaks are influenced by factors such as alloy composition and load orientation. Available data indicates that in the absence of adequate heat treatments, TP and σP are shifted towards values significantly higher than those of samples pre-annealed in order to precipitate interstitial atoms. Conditions under which precipitation influences the anomalous regime are revealed by dedicated tests. In addition to pointing out the clear effect of interstitials, these tests suggest that further ordering may contribute to the strength of Al-rich γ-TiAl.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 646 , 2000 , N7.4.1
Copyright
Copyright © Materials Research Society 2001

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.)

Footnotes

1

LPMTM, Institut Galilée, 99 av. Clément, 93430 Villetaneuse, France.

References

REFERENCES

1. Kawabata, T., Kanai, T. and Izumi, O., Acta Metall., 33, 1355 (1985).Google Scholar
2. Kawabata, T. and Izumi, O., High Temperature Aluminides and Intermetallics, Eds. Whang, S. H., Liu, C. T., Pope, D. P. and Stiegler, J. O. (The Minerals, Metals & Materials Society, Warrendale, PA, 1990) pp. 403.Google Scholar
3. Inui, H., Matsumoro, M., Wu, D.-W. and Yamaguchi, M., Phil. Mag. A, 75, 395 (1997).Google Scholar
4. Jiao, S., Bird, N., Hirsch, P. B. and Taylor, G., Phil. Mag. A, 78, 777 (1998).Google Scholar
5. Feng, Q. and Whang, S. H., High Temperature Ordered Intermetallics VIII, Eds. George, E. P., Mills, M. J. and Yamaguchi, M. (Materials Research Society, Warrendale, PA, 1999), vol. 552, pp. KK1.10.1.Google Scholar
6. Jiao, S., Bird, N., Hirsch, P. B. and Taylor, G., Phil. Mag. A, 79, 609 (1999).Google Scholar
7. Jiao, S., Bird, N., Hirsch, P. B. and Taylor, G., Phil. Mag. A, 80, in press (2000).Google Scholar
8. Loiseau, A. and Lasalmonie, A., Mater. Sci. Engng, 67, 163 (1984).Google Scholar
9. Hug, G., Ph.D. Thesis, Paris-Sud (Orsay) (1988).Google Scholar
10. Hug, G., Loiseau, A. and Veyssière, P., Phil. Mag. A, 57, 499 (1988).Google Scholar
11. Miida, R., Hashimoto, S. and Watanabe, D., Japan. J. Appl. Phys., 21, L59 (1982).Google Scholar
12. Nakano, T., Matsumoto, K., Seno, T., Oma, K. and Umakoshi, Y., Phil. Mag. A, 74, 251 (1996).Google Scholar
13. Nakano, T., Seno, T., Hayashi, K. and Umakoshi, Y., THERMEC'97, Eds. Chandra, T. and Sakai, T. (The Minerals, Metals & Materials Society, Warrendale, PA, 1997) pp. 1497.Google Scholar
14. Inui, H., Chicugo, K., Kishida, K. and Yamaguchi, M., Electron Microscopy 1998, Eds. Calderon Benavides, H. A. and Yacaman, M. J. (Institute of Physics Publishing, Bristol, 1998), vol. II, pp. 175.Google Scholar
15. Nakano, T., Hagihara, K., Seno, T., Sumida, N., Yamamoto, M. and Umakoshi, Y., Phil. Mag. A, 78, 385 (1998).Google Scholar
16. Grégori, F. and Veyssière, P., Phil. Mag. A, 79, 403 (1999).Google Scholar
17. Kaufman, M. J., Konitzer, D. G., Shull, R. D. and Fraser, H. L., Scripta Metall., 20, 103 (1986).Google Scholar
18. Hug, G. and Fries, E., Gamma Titanium Aluminides, Eds. Kim, Y.-W., Dimiduk, D. M. and Loretto, M. H. (Minerals, Metals & Materials Society, Warrendale, 1999) pp. 125.Google Scholar
19. Tian, W. H., Sano, T. and Nemoto, M., Phil. Mag. A, 68, 965 (1993).Google Scholar
20. Tian, W. H. and Nemoto, M., Gamma Titanium Almuminides, Eds. Kim, Y.-W., Wagner, R. and Yamaguchi, M. (The Minerals, Metals & Materials Society, Warrendale, PA, 1995) pp. 689.Google Scholar
21. Grégori, F., Ph. D. Thesis, University of Paris VI (1999).Google Scholar
22. Grégori, F., Penhoud, P. and Veyssière, P., Phil. Mag. A, 81, in press (2001).Google Scholar