Abstract
Abstract Austempered ductile iron (ADI) has a good combination of mechanical properties and castability allowing it to replace forged steels while offering lower costs. CADI is thought to improve ADI's abrasion resistance by the reinforcement with carbides. However, there are other potential applications where different wear mechanisms are present. This study is a continuation of a previous work on CADI in which the influence of the microstructure on the RCF performance was evaluated. Hence provides tools for microstructural design to obtain an optimal performing CADI for each application. Four CADI microstructures were evaluated in a flat washer rolling contact fatigue testing rig with parameters leading to interaction of asperities. It was found that the RCF performance of CADI can be improved by microstructure control.
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