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Aqueous slurry erosion in some cobalt base superalloys

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Abstract

An orifice erosion test was used to study the influence of metallurgical variables in a series of cobalt base superalloys on their resistance to erosion by aqueous slurries of SiO2. A slurry of 30 pct solids by weight of 4.5 μm silica was used to erode a variety of microstructures obtained by compositional and processing control. The time de-pendence of the pressure drop across an orifice (P) was found to follow the relationP = Kt-@#@ n wheret is time (min), andK andn are constants. The erosion exponent,n, varied from 0.052 to 0.148 and was found to be dependent upon carbon content and processing variables.

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Authors and Affiliations

  1. Department of Metallurgical Engineering and Materials Science, University of Notre Dame, 46556, Notre Dame, IN

    A. E. Miller (Professor) & J. P. Coyle (Project Engineer)

Authors
  1. A. E. Miller
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  2. J. P. Coyle
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Miller, A.E., Coyle, J.P. Aqueous slurry erosion in some cobalt base superalloys. Metall Trans A 9, 1777–1781 (1978). https://doi.org/10.1007/BF02663407

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  • DOI: https://doi.org/10.1007/BF02663407

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