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High-Temperature Environmental Embrittlement of Thermomechanically Processed TiAl-Based Intermetallic Alloys with Various Kinds of Microstructures

Published online by Cambridge University Press:  26 February 2011

T. Takasugi ,
Y. Hotta ,
S. Shibuya ,
Y. Kaneno ,
H. Inoue  and
T. Tetsui
T. Takasugi
Affiliation:
Department of Metallurgy and Materials Science, Graduate School of Engineering, Osaka Prefecture University, 1–1 Sakai, Osaka 599–8531, Japan
Y. Hotta
Affiliation:
Department of Metallurgy and Materials Science, Graduate School of Engineering, Osaka Prefecture University, 1–1 Sakai, Osaka 599–8531, Japan
S. Shibuya
Affiliation:
Department of Metallurgy and Materials Science, Graduate School of Engineering, Osaka Prefecture University, 1–1 Sakai, Osaka 599–8531, Japan
Y. Kaneno
Affiliation:
Department of Metallurgy and Materials Science, Graduate School of Engineering, Osaka Prefecture University, 1–1 Sakai, Osaka 599–8531, Japan
H. Inoue
Affiliation:
Department of Metallurgy and Materials Science, Graduate School of Engineering, Osaka Prefecture University, 1–1 Sakai, Osaka 599–8531, Japan
T. Tetsui
Affiliation:
Mitsubishi Heavy Ind Co Ltd, Nagasaki Research & Development Center, 5–717–1 Fukahori-Machi, Nagasaki, 851–0392, Japan
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Abstract

Thermomechanically processed TiAl-based intermetallic alloys with various alloy compositions and microstructures were tensile tested in various environmental media including air, water vapor and a mixture gas of 5vol.%H2+Ar as a function of temperature. All the TiAl-based intermetallic alloys showed reduced tensile fracture stress (or elongation) in air, water vapor and a mixture gas of 5vol.%H2+Ar not only at ambient temperature (RT∼600K) but also at high temperature mostly from 600K to 1000K (sometimes higher temperature than 1000K). The high-temperature environmental embrittlement of TiAl-based intermetallic alloy depended upon the microstructure. The possible species causing the high-temperature environmental embrittlement are hydrogen atoms decomposed from water vapor (H2O) or hydrogen gas (H2), similar to those causing the low-temperature environmental embrittlement.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 842: Symposium S – Integrative and Interdisciplinary Aspects of Intermetallics , 2004 , S5.45
Copyright
Copyright © Materials Research Society 2005

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References

REFERENCES

1. Huang, S. C. and Chesnutt, J. C., Intermetallic Compounds, Volume 2, Practice, ed. Westbrook, J. H. and Fleischer, R. L., (John Wiley and Sons, 1995), pp. 73–90.Google Scholar
2. Matejczyk, D. E. and Rhode, C. G., Scripta Metall. 24, 1369 (1990).Google Scholar
3. Chu, W. Y. and Thompson, A. W., Scripta Metall, 25, 2133 (1991).Google Scholar
4. Chan, K. S. and Kim, Y. –W, Metall. Trans. A, 23, 1663 (1992).Google Scholar
5. Chu, W. Y. and Thompson, A. W., Metall. Trans. A, 23, 1299 (1992).Google Scholar
6. Gao, K. W., Chu, W. Y., Wang, Y. B. and Hsiao, C. M., Scripta Metall, 27, 555 (1992).Google Scholar
7. Takasugi, T. and Hanada, S., J. Mater. Research, 17, 1739 (1992).Google Scholar
8. Liu, C. T. and Kim, Y. –W., Scripta Metall. 27, 599 (1992).Google Scholar
9. Nakamura, M., Hashimoto, K., Tsujimoto, T. and Suzuki, T., J. Mater. Res. 8, 68 (1993).Google Scholar
10. Nakamura, M., Itoh, N., Hashimoto, K., Tsujimoto, T. and Suzuki, T., Metall. Trans. A 25, 321 (1994).Google Scholar
11. Tsuyumu, T., Kaneno, Y., Inoue, H. and Takasugi, T., Metall. Mater. Trans. A 34, 645 (2003).Google Scholar
12. Gao, K. –W. and Nakamura, M., Mater. Sci. Eng. A, 325, 66 (2002).Google Scholar
13. Gao, K. –W. and Nakamura, M., Interemetallics, 10, 233 (2002).Google Scholar
14. Nakamura, M., Abe, E., Gao, K., Qiao, L. and Chu, W., ISIJ International, 43, 489 (2003).Google Scholar
15. Takasugi, T. and Izumi, O., Acta Metallurgica, 34, 607 (1986).Google Scholar
16. Liu, C. T., 6th Int. Symp. Intermetallic Compounds - Structure and Mechanical Properties, ed. Izumi, O., (JIM, 1991) pp. 703–712.Google Scholar