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Deformation Behavior of Niobium Silicides during High Temperature Compression

Published online by Cambridge University Press:  01 February 2011

Nobuaki Sekido ,
Seiji Miura ,
Yoko Yamabe-Mitarai ,
Yoshisato Kimura  and
Yoshinao Mishima
Nobuaki Sekido
Affiliation:
[email protected], National Institute for Materials Science, Tsukuba, Japan
Seiji Miura
Affiliation:
[email protected], Hokkaido University, Sapporo, United States
Yoko Yamabe-Mitarai
Affiliation:
[email protected], National Institute for Materials Science, Tsukuba, Japan
Yoshisato Kimura
Affiliation:
[email protected], United States
Yoshinao Mishima
Affiliation:
[email protected], Tokyo Institute of Technology, Yokohama, Japan
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Abstract

Deformation behavior of (Nb)/α-Nb5Si3 two-phase alloys is examined by high temperature compression tests. The alloys exhibit brittle fracture behavior at temperatures up to 1473 K, while reasonable compressive deformability at 1673 K. Upon high temperature compression of the alloys, the flow stress gradually decreases after the peak stress due to the recrystallization/recovery in the (Nb) phase, as well as the increase in the density of mobile dislocations within the α-Nb5Si3 phase. Two types of slip systems that operate in α-Nb5Si3 have been identified as {011)<11-1] and {001)<100] in the present study.

Keywords

dislocationstransmission electron microscopy (TEM)Nb
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1128: Symposium U – Advanced Intermetallic-Based Alloys for Extreme Environment and Energy Applications , 2008 , 1128-U07-05
Copyright
Copyright © Materials Research Society 2009

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References

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