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Synthesis, Microstructure, and Mechanical Properties of FeCo-VC Composites

Published online by Cambridge University Press:  26 February 2011

Hongbin Bei  and
E. P. George
Hongbin Bei
Affiliation:
[email protected], The University of Tennessee, Materials science and Engineering, 1The University of Tennessee,, Department of Materials Science and Engineering, knoxville, TN, 37996-2200, United States, 865-5744343, 8655747659
E. P. George
Affiliation:
[email protected], Oak Ridge National Laboratory, Materials Science and Technology Division, Oak Ridge, TN, 37831-6115, United States
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Abstract

Fe-Co-V-C quaternary alloys were drop cast and directionally solidified to obtain an in situ composite. It is found that the fully eutectic structure occurs at a composition of Fe - 40.5Co -10.4V- 8.6C (at. %) in a drop-cast alloy. Directional solidification of this composition in a high-temperature optical floating zone furnace produces a well-aligned microstructure, consisting of sub-micron VC fibers (~19% by volume) embedded in a FeCo-5V solid solution matrix containing ~ 1% C. The temperature dependencies of mechanical properties of this composite were examined by tensile tests and the composite was found to have higher yield strength and lower ductility than the matrix.

Keywords

compositedirectional solidificationmicrostructure
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 980: Symposium II – Advanced Intermetallic-Based Alloys , 2006 , 0980-II05-14
Copyright
Copyright © Materials Research Society 2007

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