Comparison of the damage induced by thermal shock in hardmetals and cermets

Autor:	José M. Sánchez, Nieves Rodriguez, Belen Lopez Ezquerra
Rok vydání:	2016
Předmět:	Quenching Thermal shock Toughness Materials science Biot number 020502 materials 02 engineering and technology Cermet 021001 nanoscience & nanotechnology Thermal expansion Transient heat transfer 0205 materials engineering Flexural strength Composite material 0210 nano-technology
Zdroj:	International Journal of Refractory Metals and Hard Materials. 61:147-150
ISSN:	0263-4368
DOI:	10.1016/j.ijrmhm.2016.09.008
Popis:	Thermal shock damage has been investigated in a WC-6 wt.%Co hardmetal and in a TiMoCN-26 wt.%Ni cermet by measuring their loss of bending strength after repeated quenching in water. The behavior of the hardmetal is significantly better than that of the cermet, showing a less abrupt loss of strength as quenching temperature step increases. Experimental values are in good agreement with R parameter predictions, especially for the cermet. Biot numbers are low enough to neglect the effect of transient heat transfer phenomena. It is concluded that a low thermal expansion coefficient combined with high strength and toughness are critical parameters to ensure an optimum thermal shock resistance.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::dc42c79ee7ef4d7c5de7af13cdb3129e https://doi.org/10.1016/j.ijrmhm.2016.09.008 Zobrazit plný text záznamu Full Text from ScienceDirect