Journal of Materials Science

, Volume 26, Issue 16, pp 4394–4398 | Cite as

Fracture toughness measurement with fatigue-precracked single edge-notched beam specimens of WC-Co hard metal

  • H. Iizuka
  • M. Tanaka


The plain-strain fracture toughness of WC-8%Co hard metal, KIC, was measured using single edge-notched beam (SENB) specimens with fatigue precrack. The fatigue precrack was introduced with compressive fatigue cycling in four-point bending at room temperature. Since stable fatigue-crack propagation was obtained from the notch tip, it was easy to control the fatigue-precrack length. A reasonable KIC value of 13.3 MPa m1/2 was obtained with the fatigue-precracked SENB specimens in four-point bending. The compressive fatigue-precracking technique in four-point bending was simple and convenient, and is therefore applicable to precracking in a variety of brittle materials prior to fracture-toughness measurements.


Polymer Fatigue Brittle Fracture Toughness Brittle Material 
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Copyright information

© Chapman & Hall 1991

Authors and Affiliations

  • H. Iizuka
    • 1
  • M. Tanaka
    • 1
  1. 1.Mining CollegeAkita UniversityAkitaJapan

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