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Volume 13 Issue 1
Aug.  2021
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Tong Guoquan, Wang Erde, He Shaoyuan. STUDY ON TESTING METHOD AND FRACTURE MODE OF WC-20(Fe/Co/Ni) CEMENTED CARBIDE[J]. Powder Metallurgy Technology, 1995, 13(1): 38-43.
Citation: Tong Guoquan, Wang Erde, He Shaoyuan. STUDY ON TESTING METHOD AND FRACTURE MODE OF WC-20(Fe/Co/Ni) CEMENTED CARBIDE[J]. Powder Metallurgy Technology, 1995, 13(1): 38-43.
shu

STUDY ON TESTING METHOD AND FRACTURE MODE OF WC-20(Fe/Co/Ni) CEMENTED CARBIDE

  • 1. Nanjing University of Aeronautics and Astronautics, Nanjing 210016;

  • 2. Harbin Institute of Technology, Harbin 150006

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  • Received Date: April 18, 1994
  • Available Online: August 01, 2021
    Graphical Abstract
    • Abstract
  • The plane strain fracture toughness KIC of WC-20 (Fe/Co/Ni) cemented carbides was obtained on single-edge notched specimen machined by electric discharge usiny extrapolation. The results showed a linear correlation between appearance strain energy release rate GQ(ρ) and curvature radius ρ of the specimen notch, i. e. GQ(ρ)=GIC +Aρ. By observation of fracture morphology using scanning electionic microscope, 4 kinds of fracture modes were considered:ductile rupture in binder phase,WC grain cleavage,intergranular fracturee along WC grain boundary and fracture near the interface of WC/binder. The fracture process of various fracture modes has been discussed.
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