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The Effect of Silicide Volume Fraction on the Creep Behavior of Nb-Silicide Based In-Situ Composites

Published online by Cambridge University Press:  21 March 2011

B.P. Bewlay ,
C.L. Briant ,
A.W. Davis  and
M.R. Jackson
B.P. Bewlay
Affiliation:
GE Corporate Research and Development, Schenectady, NY 12301, USA
C.L. Briant
Affiliation:
Division of Engineering, Brown University, Providence, RI 02912, USA
A.W. Davis
Affiliation:
Division of Engineering, Brown University, Providence, RI 02912, USA
M.R. Jackson
Affiliation:
GE Corporate Research and Development, Schenectady, NY 12301, USA
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Abstract

This paper will describe the creep behavior of high-temperature Nb-silicide in-situ composites based on quaternary Nb-Hf-Ti-Si alloys. The effect of volume fraction of silicide on creep behavior, and the effects of Hf and Ti additions, will be described. The composites were tested in compression at temperatures up to 1200°C and stress levels in the range 70 to 280 MPa. At high (Nb) phase volume fractions the creep behavior is controlled by deformation of the (Nb) and, as the volume fraction of silicide is increased, the creep rate is reduced. However, at large silicide volume fractions (>0.7) damage in the silicide begins to degrade the creep performance. The creep rate has a minimum at a volume fraction of ∼0.6 silicide. The creep performance of the monolithic and silicide phases will also be discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 646 , 2000 , N2.7.1
Copyright
Copyright © Materials Research Society 2001

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References

REFERENCES

[1] Subramanian, P.R., Mendiratta, M.G., Dimiduk, D.M. and Stucke, M.A., Mater. Sci. Eng., A239–240, 1997, pp. 1–13 10.1016/S0921-5093(97)00555-8Google Scholar
[2] Subramanian, P.R., Mendiratta, M.G. and Dimiduk, D.M., Mat. Res. Soc. Symp. Proc., 322 (1994), pp. 491–502.10.1557/PROC-322-491Google Scholar
[3] Bewlay, B.P., Jackson, M.R. and Lipsitt, H.A., Metall. and Mater. Trans., 1996, Vol 279, pp. 3801–3808.Google Scholar
[4] Bewlay, B.P., Whiting, P. and Briant, C.L., MRS Proceedings on High Temperature Ordered Intermetallic Alloys VIII, 1999, pp. KK6.11.1-KK6.11.5.Google Scholar
[5] Bewlay, B.P., Jackson, M.R. and Lipsitt, H.A., Journal of Phase Equilibria, Vol 18(3), 1997, pp. 264–278.10.1007/BF02647850Google Scholar
[6] Bewlay, B.P., Bishop, R.R. and Jackson, M.R., Journal of Phase Equilibria, Vol 19(6), 1998, pp. 577–586.Google Scholar
[7] Subramanian, P.R., Parthasarathy, T.A. and Mendiratta, M.G. and Dimiduk, D.M., Scripta Met. and Mater., Vol. 32(8), 1995, pp. 1227–1232.10.1016/0956-716X(95)00130-NGoogle Scholar
[8] Henshall, G.A and Strum, M.J., Scripta Metall., Vol 30(7), 1994, pp. 845–850 10.1016/0956-716X(94)90401-4Google Scholar
[9] Henshall, G.A., Strum, M.J., Subramanian, P.R., and Mendiratta, M.G., Mat. Res. Soc. Symp. Proc. 364, 1995, pp. 937–942.10.1557/PROC-364-937Google Scholar
[10] Briant, C.L. and Bewlay, B.P., to be published.Google Scholar