| Abstract Scope |
The WC-Co cemented carbide with duo-scale microstructures has an excellent performance both in hardness and toughness is a key research direction in the field of cemented carbide. With the increase in the scales, the design of microstructure becomes more complex, and lead to an increase in experimental work, as well as the instability in microstructure and mechanical properties, therefore, the controlling mechanism in duo-scale structure in order to get both high hardness and toughness, is still unclear. Herein, a full path crack growth modeling approach with a zero-thickness interface model and a indentation test for measuring the dynamic toughness for duo-scale WC-Co cemented carbide, with the aim to reveal the effect of duo-scale structure, are proposed. The mechanism in crack growth along WC-WC, WC-Co interface and across the binding phase is clearly analyzed in this study. |