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Effect of Growth Rate on Microstructure and Mechanical Properties of the Directionally Solidified Nb-Si Eutectic Alloy

Published online by Cambridge University Press:  11 February 2011

Nobuaki Sekido ,
Yoshisato Kimura  and
Yoshinao Mishima
Nobuaki Sekido
Affiliation:
Department of Materials Science and Engineering, Tokyo Institute of Technology, Yokohama 226–8502, Japan Now with Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, WI 53706, U.S.A
Yoshisato Kimura
Affiliation:
Department of Materials Science and Engineering, Tokyo Institute of Technology, Yokohama 226–8502, Japan
Yoshinao Mishima
Affiliation:
Department of Materials Science and Engineering, Tokyo Institute of Technology, Yokohama 226–8502, Japan
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Abstract

The development of ultra-high temperature structural materials having superior mechanical properties to the nickel based superalloys has been pursued in the niobium silicide based composites. The unidirectional solidification technique was performed on the (Nb)/Nb3Si eutectic alloy in the Nb-Si binary system. A continuity of Nb phases in the eutectic microstructure increases with decreasing a growth rate, which yields the enhancement of fracture toughness as well as high temperature strength. The mechanisms of microstructural formation, toughening, and strengthening are briefly discussed.

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References

REFERENCES

1. Faber, K.T. and Evans, A.G., Acta Met., 31, 565 (1987).Google Scholar
2. Ashby, M. F., Blunt, F. J. and Bannister, M., Acta Met., 37, 1847 (1989).Google Scholar
3. Shaw, M.C., Marshall, D.B., Dadkhah, M.S., and Evans, A.G., Acta Met., 41, 3311 (1989).Google Scholar
4. Jones, R.M., “Mechanics of Composite Materials“, McGrow-Hill (1975).Google Scholar
5. Kocherzhinskiy, Y.A., Yupko, L.M., and Shishkin, E.A., Russ. Metall., 1, 184 (1980).Google Scholar
6. Munz, D.G., Int. J. Fracture 16, 137 (1980).Google Scholar
7. Flemings, M.C., “Solidification Processing”, McGraw-Hill (1974).Google Scholar
8. Mendiratta, M.G. and Dimiduk, D.M., Scripta Met., 25, 237 (1991).Google Scholar
9. Sekido, N., Wei, F. G., Kimura, Y., Miura, S. and Mishima, Y., J. Jpn Inst. Met., 41, 1056 (2000).Google Scholar
10. Sekido, N., Doctoral Thesis, Tokyo Inst. Tech. (2002).Google Scholar
11. Summary of R&D Report for FY1999 Proposal-Based R&D Program of NEDO (in Japanese), No.98Ec07–004–2, New Energy and Industrial Technology Development Organization (1999).Google Scholar
12. “Standard Test Method for Plane-Strain (Chevron-Notch) Fracture Toughness of Metallic Materials”, Annual Book of ASTM Standards, E1304–89.Google Scholar
13. Bewlay, B.P., Lipsitt, H.A., Jackson, M.R., Reeder, W.J. and Sutliff, J.A., Mater. Sci. Eng., A192/193, 534 (1995).Google Scholar
14. Mendiratta, M.G., Lewandowski, J.J. and Dimiduk, D.M., Metall. Trans., 22A, 1573 (1991).Google Scholar
15. Nekkanti, R. and Dimiduk, D.M., MRS Symp. Proc., 194, 175 (1990).Google Scholar
16. Subramanian, P.R., Mendiratta, M.G., and Dimiduk, D.M., MRS Symp. Proc., 322, 491 (1994).Google Scholar
17. Elickson, G. L., Superalloys 1996, 35, TMS Publish (1996).Google Scholar
18. Bewlay, B.P., Jackson, M.R., and Lipsitt, H.A., Metall. Trans., 27A, 3801 (1996).Google Scholar