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Ternary Alloying of Gamma Titanium-Aluminides for Hot-Workability

Published online by Cambridge University Press:  26 February 2011

Naoya Masahashi
Affiliation:
R&D. Laboratories-I, Nippon Steel Corporation, Ida, Nakahara, Kawasaki, Kanagawa, 211 JAPAN
Y. Mizuhara
Affiliation:
R&D. Laboratories-I, Nippon Steel Corporation, Ida, Nakahara, Kawasaki, Kanagawa, 211 JAPAN
M. Matsuo
Affiliation:
R&D. Laboratories-I, Nippon Steel Corporation, Ida, Nakahara, Kawasaki, Kanagawa, 211 JAPAN
K. Hashimoto
Affiliation:
R&D. Laboratories-I, Nippon Steel Corporation, Ida, Nakahara, Kawasaki, Kanagawa, 211 JAPAN
M. Kimura
Affiliation:
R&D. Laboratories-I, Nippon Steel Corporation, Ida, Nakahara, Kawasaki, Kanagawa, 211 JAPAN
T. Hanamura
Affiliation:
R&D. Laboratories-I, Nippon Steel Corporation, Ida, Nakahara, Kawasaki, Kanagawa, 211 JAPAN
H. Fujii
Affiliation:
R&D. Laboratories-I, Nippon Steel Corporation, Ida, Nakahara, Kawasaki, Kanagawa, 211 JAPAN
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Abstract

A Microstructurally controlled γ(TiAl)-based alloy containing β(bcc) has shown remarkable tensile properties at high temperatures. It exhibits over 450% tensile elongation at 1473K. The strain rate sensitivity factors are calculated to be over 0.3 above 1273K. A specific texture is not observed from transmission X-ray photograph. TEM observation reveals that the precipitated β phase located at grain boundaries elongates uniformly along γ grain boundaries and causes large ductility. We propose β/γ dual phase alloys as high temperature deformable materials.

Type
Research Article
Copyright
Copyright © Materials Research Society 1991

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References

REFERENCES

1. Kawabata, T., Tadano, M. and Izumi, O., Scripta Met., 22, 1725(1988)Google Scholar
2. Lipsitt, H.A., Shechtman, D. and Schafric, R.E., Metall Trans., 6A, 1991(1975)Google Scholar
3. Hashimoto, K., Doi, H., Kasahara, K. and Tsujimoto, T., Proceedings of Fall Meeting of JIM, 465(1984)Google Scholar
4. Blackburn, M.J. and Smith, M.P., United States Patent No.4294615, Oct.13, 1981Google Scholar
5. Martin, P.L., Lipsitt, H.A., Nuhfer, N.T. and Williams, J.C., Titanium '80 Science and Technology, edited by Kimura, H. and Izumi, O., Metall. Soc. of AIME, New York, 1245(1980)Google Scholar
6. Kim, Y-W., J of Metals, July 24(1989)Google Scholar
7. Mizuhara, Y. et al. , Proceedings of Fall Meeting of JIM, 268(1990)Google Scholar
8. Hashimoto, K. et al. , Proceedings of 1990 Fall Meeting of TMS, to be publishedGoogle Scholar
9. Edington, J.W., Metal. Trans., 13A, 703(1982)Google Scholar