中國有色金屬學(xué)報(bào)(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 7 No. 3 September 1997 |
FRACTURE STRENGTH OF WC-Co ALLOYS
Cao Shunhua
（Powder Metallurgy National Laboratory; Central South University of Technology; Changsha 410083）
Abstract:Considering the classic GriffithOrowan equation of energy balance during fracture and the contribution of the tungsten carbide and the effective cobalt phase volume fraction to the fracture strength, a new theory, which concerns the variations of the fracture strength of WCCo alloys with their microstructural parameters such as the cobalt phase volume fraction and tungsten carbide grain size, was proposed. The predications provided by this theory tally qualitatively well with the experimental results observed by the previous researchers.
Key words: fracture strength cobalt phase volume fraction WC grain size
