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Effect of Long-Term Aging and Creep Exposure on the Microstructure of TiAl-Based Alloy for Industrial Applications

Published online by Cambridge University Press:  26 February 2011

Juraj Lapin ,
Mohamed Nazmy  and
Marc Staubli
Juraj Lapin
Affiliation:
Institute of Materials and Machine Mechanics, Slovak Academy of Sciences, Racianska 75, SK-831 02 Bratislava, Slovak Republic
Mohamed Nazmy
Affiliation:
ALSTOM Ltd., Department of Materials Technology, CH-5401 Baden, Switzerland
Marc Staubli
Affiliation:
ALSTOM Ltd., Department of Materials Technology, CH-5401 Baden, Switzerland
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Abstract

The effect of long-term aging and creep exposure on the microstructure of a cast TiAl-based alloy with nominal chemical composition Ti-46Al-2W-0.5Si (at.%) was studied. The aging experiments were performed at temperatures between 973 and 1073 K for various times ranging from 10 to 14000 h in air. Constant load tensile creep tests were performed at applied stresses ranging from 150 to 400 MPa and at temperatures between 973 and 1123 K up to 25677 h. During aging and creep testing the α2(Ti3Al)-phase in the lamellar and feathery regions transforms to the γ(TiAl)-phase and fine needle-like B2 precipitates. Microstructural instabilities lead to a softening of the alloy. The effect of this softening on long-term creep resistance is negligible at temperatures of 973 and 1023 K.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 842: Symposium S – Integrative and Interdisciplinary Aspects of Intermetallics , 2004 , S7.11
Copyright
Copyright © Materials Research Society 2005

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References

REFERENCES

1. Nazmy, M. and Lupinc, V. in Materials for Advanced Power Engineering 2002, edited by Lecomte-Beckers, J., Carton, M., Schubert, F. and Ennis, P.J., (Forschungszentrum Jülich GmbH, Vol. 21, Part I; 2002) pp. 43–56.Google Scholar
2. Lapin, J. and Nazmy, M., Mater. Sci. Eng. A 380, 298 (2004).Google Scholar
3. Nazmy, M. and Staubli, M., U.S. Pat.#5,207,982 and European Pat.#45505 BI.Google Scholar
4. Lapin, J. and Klimová, A., Kovove Mater. 41, 1 (2003).Google Scholar
5. Lapin, J. and Pelachová, T., Kovove Mater. 42, 143 (2004).Google Scholar
6. Gil, I., Muñoz-Morris, M.A., and Morris, D.G., Intermetallics 9, 973 (2001).Google Scholar
7. Yu, R., He, L.L., Jin, Z.X., Guo, J.T., Ye, H.Q., and Lupinc, V., Scripta Mater., 44, 911 (2001).Google Scholar
8. Muñoz-Morris, M.A., Gil Fernández, I., and Morris, D.G., Scripta Mater. 46, 217 (2002).Google Scholar
9. Larson, D.J., Liu, C.T., and Miller, M.K., Intermetallics, 5, 497 (1997).Google Scholar
10. Ardell, A.J., Metall. Trans. A, 16A, 2131 (1985).Google Scholar
11. Seo, D.Y., Beddoes, J., Zhao, L., and Botton, G.H., Mater. Sci. Eng. A, 329–331, 810 (2002).Google Scholar
12. Schillinger, W., Clemens, H., Dehm, G., and Bartels, A., Intermetallics, 10, 459 (2002).Google Scholar
13. Karthikeyan, S., Viswanathan, G.B., Gouma, P.I., Vijay, K., Vasudevan, V.K, Kim, Y.W., and Mills, M.J., Mater. Sci. Eng. A, 329–331, 621 (2002).Google Scholar
14. Karthikeyan, S, Viswanathan, G.B., Mills, M.J., Acta Mater., 52, 2577 (2004).Google Scholar
15. Appel, F., Intermetallics, 9, 907 (2001).Google Scholar
16. Zhao, L., Beddoes, J., Morphy, D., and Wallace, W.: Mater. Sci. Eng. A, 192–193, 957 (1995).Google Scholar