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Microstructure and high-temperature deformation of the C15 NbCr2-based Laves intermetallics in Nb–Cr–V alloy system

Published online by Cambridge University Press:  03 March 2011

T. Takasugi ,
M. Yoshida  and
S. Hanada
T. Takasugi
Affiliation:
Institute for Materials Research, Tohoku Univers ity, Katahira 2-1-1, Aoba-ku, Sendai, 980-77, Japan
M. Yoshida
Affiliation:
Miyagi National College of Technology, Natori, Miyagi Prefecture, 981-12, Japan
S. Hanada
Affiliation:
Institute for Materials Research, Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai, 980-77, Japan
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Abstract

The microstructure and the high-temperature deformation behavior of the C15 NbCr2 intermetallics alloyed with V, which consist of both the C15 monophase and the duplex structure with the bcc solid solution, are observed by some microscopic techniques and compression tests. The alloys consisting of the C15 monophase microstructure show moderately higher 0.2% yield stress than the unalloyed NbCr2, and the same BDTT as that in the unalloyed NbCr2, indicating a moderate improvement of the high temperature deformability. This result is attributed to the larger atomic free volumes between the atomic stacking layers along the {111} planes than those of the unalloyed NbCr2. The alloys consisting of the duplex microstructure show lower 0.2% yield stress and considerably decreased BDTT than the unalloyed NbCr2. The considerable deformation improvement in this group of alloys is attributed to the existence of the ductile bcc solid solution.

Type
Articles
Information
Journal of Materials Research , Volume 10 , Issue 10 , October 1995 , pp. 2463 - 2470
Copyright
Copyright © Materials Research Society 1995

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References

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