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Investigation of solidification behavior and associate microstructures of Co–Cr–W and Co–Cr–Mo alloy systems using DSC technique

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Abstract

This article presents a study of solidification behavior and the corresponding microstructure of Co–Cr–W and Co–Cr–Mo alloy systems using the differential scanning calorimetry technique. The influence of main constituents on the solidification behavior and associate microstructures of these alloys are investigated. It is found that chemical composition influences significantly the solidification behavior of cobalt-based alloys. Solution-strengthened alloy has the highest solidification temperature and narrowest solidification range. Presence of carbon decreases the solidification temperature and increases the solidification range. Addition of boron greatly decreases the solidification temperature. Carbon content dominates the solidification behavior of cobalt-based alloys when the contents of the solution-strengthening elements Mo and Ni are within their saturation in the solution matrix. However, as these contents reach a certain level, formation of intermetallic compounds changes the solidification behavior of these alloys remarkably. Increase in the contents of solution-strengthening elements reduces the solid solution transformation temperature and the eutectic temperature when carbon content is constant.

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Acknowledgement

The authors are grateful for financial support from the Natural Science & Engineering Research Council of Canada (NSERC), and both financial and in-kind support from Deloro Stellite Group.

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Authors and Affiliations

  1. Department of Mechanical and Aerospace Engineering, Carleton University, 1125 Colonel By Drive, Ottawa, ON, K1S 5B6, Canada

    R. Liu, S. Q. Xi & S. Kapoor

  2. Institute for Aerospace Research, National Research Council of Canada, 1200 Montreal Road, Ottawa, ON, K1A 0R6, Canada

    X. J. Wu

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  1. R. Liu
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  2. S. Q. Xi
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  3. S. Kapoor
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  4. X. J. Wu
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Correspondence to R. Liu.

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Liu, R., Xi, S.Q., Kapoor, S. et al. Investigation of solidification behavior and associate microstructures of Co–Cr–W and Co–Cr–Mo alloy systems using DSC technique. J Mater Sci 45, 6225–6234 (2010). https://doi.org/10.1007/s10853-010-4717-8

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  • DOI: https://doi.org/10.1007/s10853-010-4717-8

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