{beta}-Ti(M) solid solution formation and its thermal stability in a NiAl-Cr(Mo)-(Hf,Ti) near eutectic alloy
- Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang 110004 (China)
- Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016 (China)
The effects of combined additions of Ti and Hf to NiAl-Cr(Mo) eutectics on the as-cast microstructure and its thermal stability are investigated through SEM, EDS and TEM, with focus on the formation mechanism of {beta}-Ti(M, M = Hf,Cr,Ni) solid solution phase and its thermal stability after short-term heat treatment. The results show that, due to the presence of large concentrations of {beta}-phase forming and stabilizing elements dissolved into the Ti solid solution phase during solidification, the thermodynamically metastable {beta}-phase was preserved at room temperature. With respect to its thermal stability, within the experimental range examined, the {beta}-Ti(M) solid solution phase, is not influenced. From the practical application point of view, this {beta}-Ti(M) solid solution phase may offer application as a strengthening phase for the design of NiAl-Cr(Mo)-Hf based alloys.
- OSTI ID:
- 21137461
- Journal Information:
- Materials Characterization, Vol. 59, Issue 10; Other Information: DOI: 10.1016/j.matchar.2007.12.006; PII: S1044-5803(08)00002-8; Copyright (c) 2008 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 1044-5803
- Country of Publication:
- United States
- Language:
- English
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