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Thermal‐Shock Resistance and Fracture‐Strength Behavior of Two Tool Carbides
Author(s) -
MAI Y. W.
Publication year - 1976
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1976.tb09415.x
Subject(s) - thermal shock , quenching (fluorescence) , materials science , carbide , fracture (geology) , composite material , atmospheric temperature range , shock (circulatory) , metallurgy , thermodynamics , medicine , physics , quantum mechanics , fluorescence
The thermal‐stress resistance and fracture‐strength behavior of TiC and WC after severe thermal shocking were investigated. The damage‐resistance parameter, (X Ic /δ f ) 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 Has‐selman'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 (K Ic /δ f ) 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.