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A Study of the Fracture Process of WC-Co Alloys

  • Joonpyo Hong
  • Joseph Gurland

Abstract

The important role of the deformation of the cobalt-rich binder phase in the fracture process of sintered WC-Co alloys has been noted in many recently published papers, either by observation of the deformation and rupture of cobalt on the fracture faces of the alloy (1–10) and/or by incorporating the work of plastic deformation of the binder phase into an appropriate fracture theory (1–4, 6, 8, 11). In general, the dominant contribution of the cobalt to the fracture resistance of these alloys is made obvious a priori by considering that 1) the values reported for the fracture energy of sintered WC-Co alloys (102–103 Jm−2) are evidence of considerable plastic work during fracture when compared to the typical cleavage energies of tungsten carbide and other brittle materials (10−1–101 Jm−2), and 2) the primary variable controlling the fracture toughness is the thickness of the binder phase layers, as shown by many investigators (1, 4, 6–9, 11, 12).

Keywords

Cobalt Content Binder Phase High Cobalt Cobalt Layer High Cobalt Content 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    B. Nidikom and T. J. Davies, Planseeb. Pulvermet. 28:29 (1980).Google Scholar
  2. 2.
    P. K. Viswanadham, T. S. Sun, E. F. Drake, and J. A. Peck, J. Mater. Sci. 16:1029 (1981).CrossRefGoogle Scholar
  3. 3.
    M. Nakamura and J. Gurland, Met. Trans. 11A:141 (1980).Google Scholar
  4. 4.
    J. R. Pickens and J. Gurland, Mater. Sci. Eng. 33:135 (1978).CrossRefGoogle Scholar
  5. 5.
    M. J. Murray and C. M. Perrott, “Proc. 1976 Int. Cong, on Hard Materials Tool Technology,” p. 266 (1976).Google Scholar
  6. 6.
    J. L. Chermant and F. Osterstock, J. Mater. Sci. 11:1939 (1976).CrossRefGoogle Scholar
  7. 7.
    J. L. Chermant, A. Deschanvres, and A. lost, “Fracture Mechanics of Ceramics,” R. C. Bradt, D.P.H. Hasselman, and F. F. Lange, eds., Plenum Press, New York, 1:346 (1974).Google Scholar
  8. 8.
    R. C. Lueth, “Fracture Mechanics of Ceramics,” R. C. Bradt, D.P.H. Hasselman, and F. F. Lange, eds., Plenum Press, New York, 2:791 (1974).CrossRefGoogle Scholar
  9. 9.
    S. S. Yen, M.S. Thesis, Lehigh University (1971).Google Scholar
  10. 10.
    A. Hara, T. Nishikawa, and S. Yazu, Planseeb. Pulvennet. 18:28 (1970).Google Scholar
  11. 11.
    L. Lindau, “Fracture 1977,” Waterloo, Canada, 2:19 (June 1977).Google Scholar
  12. 12.
    N. Inglestrom and H. Nordberg, Eng. Fract. Mech. 6:597 (1974).CrossRefGoogle Scholar
  13. 13.
    J. Hong and J. Gurland, Metallography (in press).Google Scholar

Copyright information

© Plenum Press, New York 1983

Authors and Affiliations

  • Joonpyo Hong
    • 1
  • Joseph Gurland
    • 1
  1. 1.Division of EngineeringBrown UniversityProvidenceUSA

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