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Experimental study of the mechanics of fracture in WC-Co alloys

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Abstract

Tungsten-carbide cobalt alloys in the range of technically relevant compositions an microstructures were fractured under controlled conditions. Stable and unstable crack propagation are shown to be equivalent with respect to crack geometry and energy release rates. Based on microscopic observations and on measurements using SEM micrographs, the nature of the process zone, the maximum extension of plastic deformation, the types of crack paths, and the area fractions of these crack paths are determined. The results, which are in partial disagreement with earlier work, provide the basis for the qualitative understanding and the quantitative description of fracture processes in composites combining a ductile phase embedded in a brittle matrix.

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Authors and Affiliations

  1. University of California, Santa Barbara, CA

    L. S. Sigl

  2. Max-Planck-Institut für Metallforschung, Seestraβe 92, D-7000, Stuttgart 1, Federal Republic of Germany

    H. E. Exner

Authors
  1. L. S. Sigl
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  2. H. E. Exner
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Formerly with Max-Planck-Institut für Metallforschung, Stuttgart, Germany.

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Sigl, L.S., Exner, H.E. Experimental study of the mechanics of fracture in WC-Co alloys. Metall Trans A 18, 1299–1308 (1987). https://doi.org/10.1007/BF02647199

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