Hostname: page-component-84b7d79bbc-g5fl4 Total loading time: 0 Render date: 2024-07-28T21:14:13.996Z Has data issue: false hasContentIssue false
  • English
  • Français

Effects of Structure on Creep of Ti-53.4mol%Al Intermetallics

Published online by Cambridge University Press:  26 February 2011

Tohru Takahashi  and
Hiroshi Oikawa
Tohru Takahashi
Affiliation:
Tohoku University, Dept. of Materials Science, Faculty of Engineering, Aramaki Aoba, 980 Sendai, JAPAN
Hiroshi Oikawa
Affiliation:
Tohoku University, Dept. of Materials Science, Faculty of Engineering, Aramaki Aoba, 980 Sendai, JAPAN
Get access

Abstract

Constant stress compression creep behavior at elevated temperature was investigated on Ti-53.4mol%Al polycrystalline intermetallics of gamma single phase in different grain morphologies: coarse columnar grains, fine recrystallized grains and equiaxed grains. The shape of creep curves depended on the applied stress: normal primary transient followed by steady creep was found at higher stresses, but at lower stresses steep acceleration was observed after taking minimum creep rates. This behavior was common to all the grain morphology. The creep rate itself was not greatly different among the three types of structure, and the stress exponent of about 4 and the apparent activation energy of about 340kJ/mol at 0.3 true strain were common to all three types. The shape and size of grains do not affect the essential creep features of this material.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 133: Symposium H – High-Temperature Ordered Intermetallic Alloys III , 1988 , 699
Copyright
Copyright © Materials Research Society 1989

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. Lipsitt, H.A., in High Temperature Ordered Intermetallic Alloys, edited by Koch, C.C., Liu, C.T. and Stoloff, N.S. (Mater. Res. Soc. Proc. 39, Pittsburgh, PA, 1985) pp. 351–364.Google Scholar
2. Lipsitt, H.A., Shechtman, D. and Schafrik, R.E., Metall. Trans. 6A, 1991 (1975).CrossRefGoogle Scholar
3. Sastry, S.M.L. and Lipsitt, H.A., Titanium ′80, (Proc. 4th Intern. Conf. on Titanium), ed. by Kimura, H. and Izumi, O. (AIME, New York, 1980), pp.1231–1243; P.L. Martin, H.A. Lipsitt, N.T. Nuhfer and J.C. Williams, Titanium ′80, (Proc. 4th Intern. Conf. on Titanium), ed. by H. Kimura and O. Izumi (AIME, New York, 1980), pp.1245–1254.Google Scholar
4. Blackburn, M.J. and Smith, M.P., U.S. Patent No. 4 294 615 (13 October 1981).Google Scholar
5. Nobuki, M., Hashimoto, K., Tsujimoto, T. and Asai, Y., Nippon Kinzoku Gakkai-shi (J. Jpn. Inst. Met.), 50, 840 (1986).Google Scholar
6. Mitao, S., Kohsaka, Y. and Ouchi, C., THERMEC-88 (Proc. Intern. Conf. on Physical Metallurgy of Thermomechanical Processing of Steels and Other Metals), edited by Tamura, I. (Iron Steel Inst. Jpn., Tokyo, 1988) pp.620–627.Google Scholar
7. Martin, P.L., Mendiratta, M.G. and Lipsitt, H.A., Metall. Trans. 14A, 2170 (1983).CrossRefGoogle Scholar
8. Loiseau, A. and Lasalmonie, A., Mat. Sci. Eng. 67, 163 (1984).CrossRefGoogle Scholar
9. Takahashi, T., Nagai, H. and Oikawa, H., Nippon Kinzoku Gakkai-shi (J. Jpn. Inst. Met.), (submitted).Google Scholar
10. Nagai, H., Takahashi, T. and Oikawa, H., J. Mat. Sci. (submitted).Google Scholar
11. Ouchi, K., Iijima, Y. and Hirano, K., Titanium ′80, (Proc. 4th Intern. Conf. on Titanium), ed. by Kimura, H. and Izumi, O. (AIME, New York, 1980), pp.559–568.Google Scholar
12. Takahashi, T., Nagai, H. and Oikawa, H., Mater. Sci. Eng. (submitted).Google Scholar