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Nanocrystalline TiAl Compacts Prepared by Hddr and Hot Pressing

Published online by Cambridge University Press:  15 February 2011

K. Aoki ,
Y. Itoh ,
Y. Kawamura ,
A. Inoue  and
T. Masumoto
K. Aoki
Affiliation:
Institute for Materials Research, Tohoku University, Sendai 980–77, Japan
Y. Itoh
Affiliation:
Institute for Materials Research, Tohoku University, Sendai 980–77, Japan
Y. Kawamura
Affiliation:
Institute for Materials Research, Tohoku University, Sendai 980–77, Japan
A. Inoue
Affiliation:
Institute for Materials Research, Tohoku University, Sendai 980–77, Japan
T. Masumoto
Affiliation:
Institute for Materials Research, Tohoku University, Sendai 980–77, Japan
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Abstract

Nanocrystalline TiAl powder was formed by the modified HDDR (hydrogenation-disproportion-dehydrogenaton-recombination) method utilizing ball milling in a hydrogen atmosphere. That is, TiAl compound powder decomposed into TiH2 and Al-rich TiAl powders by mechanical grinding in a hydrogen atmosphere (HD process). Dehydrogenaton-recombination (realloying) resulted in the formation of nanocrystalline TiAl powder when heated to about 700 K in an argon atmosphere (DR process). Almost fully dense nanocrystalline TiAl compacts were prepared by a combination of HDDR and hot-pressing at 873 K which is lower than the usual consolidation temperature by about 300 K. The TiAl compact thus made was brittle in the as-pressed state but showed compressive ductility after annealing.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 460: Symposium Z – High-Temperature Ordered Intermetallic Alloys VII , 1996 , 153
Copyright
Copyright © Materials Research Society 1997

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References

REFERENCES

1. Yamaguchi, M. and Umakoshi, Y., Prog. Mater. Sci., 34 (1991) 1.Google Scholar
2. Kim, Y-W., Acta Metall. Mater., 40 (1992) 1121.Google Scholar
3. Rawers, J.C., Wrzesinski, W.R., J. Mater. Sci., 27 (1992) 2877.Google Scholar
4. Nakamura, M. and Kaieda, Y., Powder Metall., 31 (1988) 201.Google Scholar
5. Takeshita, T. and Nakayama, R., 10th Int. Workshop on Rare Earth Magnets and their Applications, Kyoto, p 551 (1989).Google Scholar
6. Harris, I.R. and McGuiness, P.J., J. Less Common Met., 172–174 (1991) 1273.Google Scholar
7. Chu, W-Y. and Thompson, A.W., Script Metall. Mater., 25 (1991) 2133.Google Scholar
8. Aoki, K., Itoh, Y. and Masumoto, T., Script Metall. Mater., 31 (1994) 1271.Google Scholar
9. Aoki, K., Itoh, Y., Par, J., Kawamura, Y., Inoue, A. and Masumoto, T., Intermetallics, 4 (1996) S103.Google Scholar
10. Hosoi, M., Maeda, T. and Okada, M., ISIJ, 80 (1994) 83.Google Scholar
11. Sugimoto, H., Ameyama, K., Inaba, T. and Tokizane, M., Jpn. Inst. Met. 53 (1989) 628.Google Scholar