Journal of Materials Science

, Volume 16, Issue 4, pp 1029–1038 | Cite as

Quantitative fractography of WC-Co cermets by Auger spectroscopy

  • R. K. Viswanadham
  • T. S. Sun
  • E. F. Drake
  • J. A. Peck


A general procedure has been developed to determine the area fraction occupied by the binder on the fracture surfaces of cemented carbides. The area fraction of binder on the fracture surface was obtained from the relative peak-to-peak height ratios of elements in the binder and the carbide content was measured by Auger spectroscopy on the fracture surface and an adjacent polished section and the volume fraction of binder present in the cermet. This procedure was employed to determine the area fraction of binder on the fracture surfaces of WC-Co cermets with different binder contents and carbide grain sizes. The average binder mean free path and the area fraction of binder together yield the amount of plastically deformed binder per unit area of fracture surface. The volume of deformed binder and its in situ yield strength were combined to obtain a term proportional to the amount of plastic work done per unit area of fracture surface. It is shown that the correlation between this plastic work term and the fracture toughness of the cermets is good, while correlation with binder mean free path alone is poor.


Carbide Yield Strength Fracture Surface Fracture Toughness Unit Area 
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Copyright information

© Chapman and Hall Ltd 1981

Authors and Affiliations

  • R. K. Viswanadham
    • 1
  • T. S. Sun
    • 1
    • 2
  • E. F. Drake
    • 1
  • J. A. Peck
    • 1
  1. 1.Materials ResearchHoustonUSA
  2. 2.Martin Marietta LaboratoriesBaltimoreUSA

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