Hostname: page-component-77c89778f8-cnmwb Total loading time: 0 Render date: 2024-07-17T14:41:28.087Z Has data issue: false hasContentIssue false
  • English
  • Français

Microstructures and Properties of Ds in-Situ Composites of Nb-Ti-Si Alloys

Published online by Cambridge University Press:  22 February 2011

B. P. Bewlay ,
M. R. Jackson ,
W. J. Reeder  and
H. A. Lipsitt
B. P. Bewlay
Affiliation:
GE Corporate Research and Development Center, Schenectady, New York 12301.
M. R. Jackson
Affiliation:
GE Corporate Research and Development Center, Schenectady, New York 12301.
W. J. Reeder
Affiliation:
Wright State University, Dayton, Ohio 45435.
H. A. Lipsitt
Affiliation:
Wright State University, Dayton, Ohio 45435.
Get access

Abstract

In-situ composites based on binary Nb-Si alloys and consisting of a Nb solid solution with Nb3Si or Nb5Si3 have shown a promising combination of low temperature and high temperature mechanical properties. The environmental resistance and room temperature fracture toughness of these composites can be further enhanced by additions such as Ti, Hf, Cr, and Al. In the present study, ternary Nb-Ti-Si alloys were prepared by directional solidification to generate aligned two and three phase composites containing a Nb solid solution with Nb3Si and/or Nb5Si3. The present paper will describe microstructures, phase equilibria and fracture toughness of these composites. The improvement in the room temperature fracture toughness over binary Nb-Nb5Si3 composites is discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 364: Symposium L – High-Temperature Ordered Intermetallic Alloys–VI , 1994 , 943
Copyright
Copyright © Materials Research Society 1995

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

[1] Subramanian, P.R., Mendiratta, M.G. and Dimiduk, D.M., in High Temperature Silicides and Refractory Alloys, Eds. Briant, C.L., Petrovic, J.J., Bewlay, B.P., Lipsitt, H.A. and A.K. Vasudevan, (Mater. Res. Soc. Proc. 322, Pittsburgh, PA, 1994) pp. 491–502.Google Scholar
[2] Mendiratta, M.G., Lewandowski, J.J. and Dimiduk, D.M., Metall. Trans. 22A, 1573 (1991).Google Scholar
[3] Mendiratta, M.G. and Dimiduk, D.M., Metall. Trans. 24A, 501 (1993).Google Scholar
[4] Jackson, M.R., Rowe, R.G. and Skelly, D.W., Annual Report, WRDC Contract # F33615–91–C–5613, (1994).Google Scholar
[5] Jackson, M.R. and Jones, K.D., in Refractory Metals Extraction, Processing and Applications, Eds. Liddell, K.C., Sadoway, D.R. and Bautista, R.G. (TMS Publications, Warrendale, PA, 1991) pp. 310–320.Google Scholar
[6] Massalski, T.B., Binary Alloy Phase Diagrams (ASM International, Metals Park, Ohio, 1991).Google Scholar
[7] Chang, K-M., Bewlay, B.P., Sutliff, J.A. and Jackson, M.R., J. of Metals 44(6), 59 (1992).Google Scholar
[8] Bewlay, B.P., Lipsitt, H.A., Reeder, W.J., Jackson, M.R. and Sutliff, J.A., in Processing and Fabrication of Advanced Materials for High Temperature Applications III. Eds. Ravi, V.A., Srivatsan, T.S. and Moore, J.J. (TMS Publications, Warrendale, PA, 1993) pp. 547–565.Google Scholar