The influence of microstructural characteristics on CADI rolling contact fatigue life

PEDRO, D. I.; DOMMARCO, R. C.

Florianópolis, SC, Brasil

Conferencia; 3rd International Brazilian Conference on Tribology ? TriBoBR 2018; 2018

Universidad Tecnológica Federal do Paraná y otras

Carbidic Austempered ductile iron (CADI) is a novel variant of the ductile iron family, based on an austempered ductile iron (ADI) that includes a controlled dispersion of carbides. CADI was originally designed to improve abrasive wear resistance through the incorporation of hard particles (the carbides) and has managed to achieve lower wear rates at lower cost and higher toughness when compared to other materials [ ]. Carbide content, distribution and matrix microstructure are controlled by the chemical composition, casting procedure and heat treatment.CADI studies have been focused almost exclusively on the abrasive behavior and therefore other tribosystems should be analyzed in order to evaluate its potential use for different applications requiring high wear resistance. In this case, the influence of different matrix hardness on rolling contact fatigue (RCF) resistance of CADI was studied and compared to that of ADI.