Hostname: page-component-586b7cd67f-t8hqh Total loading time: 0 Render date: 2024-11-25T19:33:16.506Z Has data issue: false hasContentIssue false
  • English
  • Français

High Temperature Creep of Alpha-2 Ti-34mo1%Al Polycrystals

Published online by Cambridge University Press:  22 February 2011

Hiroshi Oikawa ,
Toshihiko Fukuda  and
Makoto Ohtsuka
Hiroshi Oikawa
Affiliation:
Department of Materials Science, Faculty of Engineering, Tohoku University, Sendai, 980–77, Japan
Toshihiko Fukuda
Affiliation:
Now with Sumitomo Light Metal Ind. Ltd., Nagoya, 455.
Makoto Ohtsuka
Affiliation:
Now with Institute for Advanced Materials Processing, Tohoku University, Sendai, 980–77.
Get access

Abstract

Constant-stress compressive creep tests were carried out on an Al-rich a2 single-phase material, which had equiaxed-grains of 60μim in grain size, at 1050∼1250 K under 100∼500MPa. The type of the primary creep stage and the microstructures developed during creep depend greatly on the creep condition. The minimum creep-rate, however, can be represented by one set of parameters over the whole range of experimental condition. The stress exponent is 5.0±0.2 and the (modulus-compensated) activation energy is 360 ± 10kJ/mol. The Dorn-type plot of the minimum creep rate reveals that the normalized creep strength of fine-grained Ti-34mol%Al is not greatly different from that of disordered solid-solution hardened alloys.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 364: Symposium L – High-Temperature Ordered Intermetallic Alloys–VI , 1994 , 517
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

1. Fukuda, T., Ohtsuka, M., Nagae, Y. and Oikawa, H., Mater. Trans. JIM, (submitted).Google Scholar
2. Ohtsuka, M., Fukuda, T. and Oikawa, H., Nippon Kinzoku Gakkai-shi (J. Jpn. Inst. Met.) (submitted).Google Scholar
3. Mukherjee, A.K., Bird, J.E. and Dorn, J.E., Trans. ASM, 62,155–179 (1969).Google Scholar
4. Schafrik, R.E., Metall. Trans., 8A, 1003–1006 (1977).Google Scholar
5. Ouchi, K., Iijima, Y. and Hirano, K., in Titanium ' 80, Science and Technology, edited by Kimura, H. and Izumi, O. (AIME, New York, 1980), p.559–568.Google Scholar
6. Sprengel, W., Oikawa, N., Sakazawa, T., Nakajima, H. and Oikawa, H., presented at the 1994 Fall Meeting of JIM, Fukuoka, Oct. 1994.Google Scholar