| Abstract Scope |
Ductile iron (DI), also known as nodular or spheroidal graphite iron, is a Fe-C-Si alloy treated with Mg or Ce to form nodular graphite, enhancing mechanical properties. Its excellent impact resistance and ductility make it valuable for producing equipment and machine parts exposed to friction and wear. Quenching & partitioning (Q&P) of DI produces quenched and partitioned ductile iron (Q&PDI), combining high strength, ductility, fatigue resistance, and machinability. The Q&P process creates a composite microstructure of martensite, retained austenite, and graphite. Retained austenite enhances ductility, while martensite and ferrite provide strength and hardness. The research aimed to achieve the maximum stable austenite with martensite or bainite at room temperature using optimal quenching and partitioning temperatures, verified through XRD analysis, optical, and SEM images. Finally, an optimum partitioning temperature was suggested to obtain the maximum amount of austenite in Q&PDI. |