발간논문

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Vol.23, No.1, 19 ~ 25, 1985
Title
Relationships between the Microstructure and Fracture Toughness of WC - Co Alloys
조경목Kyung Mox Cho, 현태욱Tae Wook Hyun, 이후철Hu Chul Lee
Abstract
A study on the fracture toughness of WC-Co using alloys is made single-edge notched beam specimens pre-cracked by electron-discharge machining. The microstructural parameters are determined on the electron micrographs by linear analysis. The relations between K_(IC) and the microstructural parameters show that K_(IC) tends to increase with increased binder volume fraction and cobalt mean free path and tends to decrease with increases in WC contiguity, but cannot be related only to one microstructural parameter. A structure model is sugested to estimate the fracture path in WC-Co alloys and the critical strain energy release rate is evaluated from this fracture model.
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