Thermal-Shock Resistance and Fracturestrength Behavior of Two Tool Carbides
نویسنده
چکیده
The thermal-stress resistance and fracture-strength behavior of TIC and WC after severe thermal shocking were investigated. The damage-resistance parameter, (K1c/af)2, for both carbides was determined over a wide range of loading rates and temperatures. The fracture-strength behavior of these two carbides in the quenching temperature range of 25" to 800°C follows Hasselman's model for an instantaneous strength loss at a critical quenching temperature. When WC was shocked at temperatures > 800"C, it exhibited higher retained strengths because of its higher (K1c/af)2 values at these temperatures. The effects of specimen size and repeated thermal shocks on retained strength and critical quenching temperature for these carbides were also investigated.
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