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Fracture Behavior of Vanadium/Vanadium Silicide In-Situ Composites

Published online by Cambridge University Press:  01 January 1992

M. J. Strum  and
G. A. Henshall
M. J. Strum
Affiliation:
Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, CA 94550.
G. A. Henshall
Affiliation:
Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, CA 94550.
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Abstract

The fracture behavior of V-V3Si in-situ composite alloys has been evaluated for intermetallic phase fractions of 30, 50, and 70 volume percent. In addition, the mechanical properties of the ductile constituent in these composites have been evaluated from two alloys containing silicon at its solubility limit in vanadium at the eutectic temperature and at 1400°C. The fracture toughness was found to increase monotonically with increasing volume fraction of the ductile phase. Fractography has shown evidence of crack bridging by the vanadium solid solution phase and increased ductility within the composite relative to bulk measurements. The toughness results are compared with predictions based on an existing model of ductile-phase toughening using our measurements of component properties.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 288: Symposium L – High-Temperature Ordered Intermetallic Alloys V , 1992 , 1093
Copyright
Copyright © Materials Research Society 1995

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References

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