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The effect of Anti-Phase Domain Size on the Ductility of a Rapidly Solidified Ni3Al-Cr Alloy

Published online by Cambridge University Press:  26 February 2011

G. Carro ,
G. A. Bertero ,
J. E. WlTTIG  and
W. F. Flanagan
G. Carro
Affiliation:
Department of Materials Science and Engineering Vanderbilt University, Nashville, TN 37235
G. A. Bertero
Affiliation:
Department of Materials Science and Engineering Vanderbilt University, Nashville, TN 37235
J. E. WlTTIG
Affiliation:
Department of Materials Science and Engineering Vanderbilt University, Nashville, TN 37235
W. F. Flanagan
Affiliation:
Department of Materials Science and Engineering Vanderbilt University, Nashville, TN 37235
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Abstract

Tensile tests on splat-quenched Ni3Al-Cr alloys showed a sharp decrease in ductility with long-time annealing. The growth of the initially very-fine size anti-phase domains showed a tenuous correlation with ductility up to a critical size, where ductility was lost. The grain size was relatively unaffected by these annealing treatments, but the grain-boundary curvature decreased, implying less toughness. An important observation was that for the longest annealing time a chromium-rich precipitate formed, which our data indicate could be a boride. Miniaturized tensile tests were performed on samples which were all obtained from the same splat-quenched foil, and the various domain sizes were controlled by subsequent annealing treatments.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 133: Symposium H – High-Temperature Ordered Intermetallic Alloys III , 1988 , 535
Copyright
Copyright © Materials Research Society 1989

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References

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