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The Stability of B2 Compounds in Ti-Modified Nb-Al Alloys

Published online by Cambridge University Press:  01 January 1992

J. Shyue ,
D-H. Hou ,
S.C. Johnson ,
M. Aindow  and
H.L. Fraser
J. Shyue
Affiliation:
Department of Materials Science and Engineering, The Ohio State University, 2041 College Road, Columbus, OH 43210
D-H. Hou
Affiliation:
Department of Materials Science and Engineering, The Ohio State University, 2041 College Road, Columbus, OH 43210
S.C. Johnson
Affiliation:
Department of Materials Science and Engineering, The Ohio State University, 2041 College Road, Columbus, OH 43210
M. Aindow
Affiliation:
Now at School of Metallurgy and Materials, and the IRC in Materials for High Performance Application, The University of Birmingham, Elms Road, Birmingham B15 2TT, UK
H.L. Fraser
Affiliation:
Department of Materials Science and Engineering, The Ohio State University, 2041 College Road, Columbus, OH 43210
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Abstract

It has been found that additions of Ti to Nb3Al results in the formation of phases with the B2 crystal structure in as-cast samples. The microstructure and phase stability of two alloys, namely Nb-15Al-10Ti and Nb-15Al-40Ti (in at.%), have been studied. Heat-treatment of the Nb-15Al-10Ti alloy at 1100°C results in the precipitation of an A15 phase in the B2 matrix. A particular orientation relationship exists between the two phases. Heat-treatment above 1600°C results in the dissolution of the second phase. The ALCHEMI technique has been employed to assess qualitatively the distribution of atom types over the two sublattices of the B2 compound.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 288: Symposium L – High-Temperature Ordered Intermetallic Alloys V , 1992 , 243
Copyright
Copyright © Materials Research Society 1995

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References

REFERENCES

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