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Tribological Performance of Molybdenum Stellite Alloys under Dry-Sliding Wear

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Abstract

Elements tungsten and molybdenum are the key constituents of Stellite alloys as solutes to strengthen the solid solution matrix. Meanwhile, they also promote formation of W-rich and Mo-rich carbides when present in large quantities in high-carbon Stellite alloys. Extensive studies on tungsten Stellite alloys, in particular, Stellite® 6, have been reported in the literature; however, molybdenum Stellite alloys, especially, the influence of Mo content on the performance of the alloys, have been rarely investigated. In this research, the tribological performance of three molybdenum Stellite alloys with varying C and Mo contents is studied using pin-on-disk dry-sliding wear test at ambient temperature, focusing on the effect of test duration and interrupted test on the wear behavior of the alloys. The worn surfaces are examined using SEM/EDS, and the analyses of the surface morphologies help explore the wear mechanisms of these alloys in dry-sliding condition. A wear model is developed for molybdenum Stellite alloys, based on the Archard equation in check with the wear test data, using hardness as a controlling factor.

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Acknowledgments

The authors are grateful for financial support from the Natural Science & Engineering Research Council of Canada (NSERC), kind support of National Research Council Canada (NRC), and both financial and kind support of Kennametal Stellite Inc.

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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

    Rachel Collier, Xiaozhou Zhang & Rong Liu

  2. Structures and Materials Performance Laboratory, Aerospace Research Center, National Research Council Canada, Ottawa, ON, K1A 0R6, Canada

    Xijia Wu

  3. Kennametal Stellite Inc, Belleville, ON, K8N 1G2, Canada

    Matthew Yao

Authors
  1. Rachel Collier
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  2. Xiaozhou Zhang
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  3. Rong Liu
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Correspondence to Rong Liu.

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Collier, R., Zhang, X., Liu, R. et al. Tribological Performance of Molybdenum Stellite Alloys under Dry-Sliding Wear. J. of Materi Eng and Perform 29, 1384–1399 (2020). https://doi.org/10.1007/s11665-020-04650-y

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  • DOI: https://doi.org/10.1007/s11665-020-04650-y

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