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Microstructural Studies of β-NiAl and α-Re Composites Produced by Eutectic Solidification

Published online by Cambridge University Press:  21 February 2011

D. P. Mason ,
D. C. Van Aken  and
J. G. Webber
D. P. Mason
Affiliation:
Department of Materials Science and Engineering University of Michigan 2300 Hayward St. Ann Arbor, MI 48109-2136
D. C. Van Aken
Affiliation:
Department of Materials Science and Engineering University of Michigan 2300 Hayward St. Ann Arbor, MI 48109-2136
J. G. Webber
Affiliation:
Department of Materials Science and Engineering University of Michigan 2300 Hayward St. Ann Arbor, MI 48109-2136
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Abstract

Arc-melted alloys of stoichiometric β-NiAl with additions of up to 1.5 atomic percent Re were examined to determine the nature of the quasi-binary phase diagram. Analysis of the Re segregation during solidification confirmed the eutectic nature. Solubility of Re in the β-NiAl structure was limited to approximately 0.5 atomic percent and precipitation of α-Re was observed in the hypoeutectic alloys. An orientation relationship with (101)β // (0001)α and [111]α // [1210]βwas determined for these rod-like precipitates.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 194: Symposium R – Intermetallic Matrix Composites I , 1990 , 341
Copyright
Copyright © Materials Research Society 1990

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