Abstract
The strength of WC-Co was measured using three-point bending specimens (transverse rupture strength) and ring specimens. The strength values obtained by the two tests were compared. The stress distribution in a ring specimen is similar to that in a three-point bending specimen, and a ring test can thus be regarded as a form of a transverse rupture test. However, tensile strength values obtained from ring specimens are lower than those obtained from three-point specimens and this discrepancy is more pronounced for specimens with a low cobalt content. This can be attributed largely to the size effect, the ring specimens having a much larger volume than the three-point bending specimens.
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