Hostname: page-component-745bb68f8f-kw2vx Total loading time: 0 Render date: 2025-01-15T07:17:54.898Z Has data issue: false hasContentIssue false
  • English
  • Français

Lamellar Interfaces and their Contribution to Plastic Flow Anisotropy in Tial-Based Alloys.

Published online by Cambridge University Press:  01 January 1992

Bimal K. Kad ,
Peter M. Hazzledine  and
Hamish L. Fraser
Bimal K. Kad
Affiliation:
AMES-0411, University of California-San Diego, LaJolla, CA 92093.
Peter M. Hazzledine
Affiliation:
UES Inc. 4401 Dayton-Xenia Road, Dayton, OH 45432.
Hamish L. Fraser
Affiliation:
2041 College Road, Ohio State University, Columbus, OH 43210
Get access

Abstract

Lamellar γ/α2 TiAl deforms much more easily in the plane of the lamellae (soft mode) than across the lamellae (hard mode). This plastic anisotropy is caused by the soft mode being softer and the hard mode being harder than in monolithic TiAl. The suggested explanations are that the γ phase is softened by interstitial gettering, that an extra soft mode exists because superdislocations can channel along interfaces and that the hard mode is dominated by the Hall-Petch effect.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 288: Symposium L – High-Temperature Ordered Intermetallic Alloys V , 1992 , 495
Copyright
Copyright © Materials Research Society 1995

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

REFERENCES

1. Fujiwara, T., Nakamura, A., Hososmi, M., Nishitani, S.R., Shirai, Y. and Yamaguchi, M., Phil. Mag. A, 61, No. 4, 591, (1990)Google Scholar
2. Inui, H., Oh, M.H., Nakamura, A. and Yamaguchi, M., Acta. Met., 40, (11), 3095, (1992)Google Scholar
3. Kim, Y. W., J. Metals, 41, No. 7, (1989)Google Scholar
4. Hall, E.L. and Huang, S.C., J. Mat. Res., 4, 595, (1989).Google Scholar
5. Reviere, R.D., Oliver, B.F. and Bruns, D.D., Mat. & Manufacturing Proc, 4, (1), 103, (1989)Google Scholar
6. Minonishi, Y., Phil. Mag., 63, (5), 1085, (1991)Google Scholar
7. Vasudevan, V.K., Stucke, M.A., Court, S.A. and Fraser, H.L., Phil. Mag. Lett. 59, 299, (1989)Google Scholar
8. Yang, Y.S. and Wu, S.K., Scripta Met., 24, 1801, (1990), Phil. Mag. A65, 15, (1992).Google Scholar
9. Hazzledine, P.M., Kad, B., Dimiduk, D.M. and Fraser, H.L., MRS Conf. Proc. 273, 81, (1992)Google Scholar
10. Kad, B.K. and Hazzledine, P.M., Phil. Mag. Lett. 66, 133, (1992)Google Scholar
11. Umakoshi, Y., Nakano, T., and Yamane, T., Mat. Sci. Eng., A152, 81, (1992).Google Scholar
12. Umakoshi, Y., Nakano, T., and Yamane, T., Scripta Met. 25 (7), 1525, (1991).Google Scholar
13. Kad, B.K.. Swaminathan, S. and Fraser, H.L., unpublished results.Google Scholar