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A Comparative Study of Short Range Order in Fe-Cr and Fe-V Alloys Around Equiatomic Composition

Published online by Cambridge University Press:  26 February 2011

P.E.A. Turchi ,
M. Sluiter  and
G. M. Stocks
P.E.A. Turchi
Affiliation:
LLNL, Condensed Matter Division, P.O. Box 808, Livermore, CA 94550
M. Sluiter
Affiliation:
LLNL, Condensed Matter Division, P.O. Box 808, Livermore, CA 94550
G. M. Stocks
Affiliation:
ORNL, Metals and Ceramics Division, P.O. Box 2008, Oak Ridge, TN 37831–6114
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Abstract

Configurational energies have been calculated for equiatomic Fe-Cr and Fe-V alloys possessing the high temperature bcc crystalline structure, within a first principles electronic band structure approach. In agreement with experimental facts, a tendency towards order, with a B2 ordered structure of CsCI type, is found for FeV whereas phase separation characterizes FeCr. These results suggest that the nature of short range order in the high temperature bcc solid solution is not the primary driving force for describing the structural transformation from bcc to sigma which takes place in both alloys upon decreasing temperature.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 213: Symposium Q – High-Temperature Ordered Intermetallic Alloys IV , 1990 , 75
Copyright
Copyright © Materials Research Society 1991

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References

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