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Phase Stabilities in Some B2 Type Ordered Ni-Al-X Alloys

Published online by Cambridge University Press:  22 February 2011

Tetsumori Shinoda ,
Y. Mishima  and
T. Suzuki
Tetsumori Shinoda
Affiliation:
Hitachi Res.Lab., Hitachi Ltd., Hitachi 317, Japan
Y. Mishima
Affiliation:
P.& I. Lab., Tokyo Inst. Tech., Yokohama 227, Japan
T. Suzuki
Affiliation:
Dept. Mater. Enging., Hokkaido Univ., Sapporo 060, Japan.
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Abstract

The difference in developing of solubility lobe (s.l.) of B2 phase from the B2 NiAl point on each isothermal phase diagram of Ni-Al-Co, Ni-Al-Fe and Ni-Al-Mn is expected to be explained in terms of the pattern of free energy minimum (f.e.m.) line in the B2 phase region of these phase diagrams. To calculate such the f.e.m. line, a simple way has been proposed based on the tetrahedron approximation of the cluster variation method (CVM) making use of a relationship to correlate the conventional chemical potential of a species with some kinds of the CVM variables. The calculated results show that the f.e.m. line well reflects the solubility lobe developing of the B2 phase for both Ni-Al-Fe and Ni-Al-Co while some disagreement arises with Ni-Al-Mn. The results also show a theoretical possibility of transition from the high ordered state B2 to a low ordered one under a relatively low temperature regime so far as the present free energy model are concerned.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 364: Symposium L – High-Temperature Ordered Intermetallic Alloys–VI , 1994 , 573
Copyright
Copyright © Materials Research Society 1995

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References

1. Protopopescu, M.H. and Hubert, H., in Ternary Alloys, edited by Petzow, G. and Effenberg, G. (VCH Publishrs, New York, 1991) Vol.4 Al-Co-Ni pp.234–244.Google Scholar
2. Budberg, P. and Prince, A., in Ternary Alloys, edited by Petzow, G. and Effenbergpar, G. (VCH Publishrs, New York, 1992) Vol.5 Al-Fe-Ni pp.309–323.Google Scholar
3. Suzuki, T., in Ternary Alloys, edited by Petzow, G. and Effenberg, G. (VCH Publishrs, New York, 1993) Vol.7 Al-Mn-Ni pp.84–99.Google Scholar
4. Ackermann, H., Inden, G. and Kikuchi, R., Acta Metall. 37, 1 (1989).Google Scholar
5. Shinoda, T., Hosoda, H. and Mishima, Y., CVM Approach to Estimate Vacancy Properties in B2 Type ordered NiAl and NiFeAl Alloys, 1995 TMS Spring Meeting Proceedings ( to be published).Google Scholar
6. Hultgren, R., Desai, P.D., Hawkins, D.T., Gleiser, M. and Kelley, K.K., Selected Values of Thermodynamic Properties of the elements (ASM Metals park, Ohio, 1973).Google Scholar
7. Hultgren, R.,Orr, R.L., Anderson, P.D. and Kelley, K.K., Selected Values of Thermodynamic Properties of Metalls and Alloys (John Wiley & Sons, Inc., New York, 1963).Google Scholar
8. Miedema, A.R., de Chatel, P.D. and de Boer, F.R., Physica 100B, 1 (1980).Google Scholar