REVIEW ON PRODUCCION PROCESSES AND MECHANICAL PROPERTIES OF DUAL PHASE ADI

BASSO, ALEJANDRO DANIEL; SIKORA, JORGE ANTONIO

INTERNATIONAL JOURNAL OF METALCASTING

AMER FOUNDRY SOC INC

Año: 2012 vol. 6 p. 7 - 14

1939-5981

During the last years, researchers have sought new DI applications focusing on the development of mixed microstructures, such as ferritic-bainitic or ferritic-martensitic. These kinds of structures allow to obtain DI with good combinations of mechanical properties, as regards other conventional DI. The combination of properties offered by the mixed structure DI has opened new horizons for cast iron to replace steel castings and forgings in many engineering applications, especially by the use of a new kind of DI, so called “Dual Phase Austempered Ductile Iron” (Dual Phase ADI). This new kind of DI has a particular microstructure composed of different amounts and morphologies of ausferrite and free ferrite. This new Dual Phase ADI microstructures have afforded more opportunities for DI applications, acquiring better combinations of strength, ductility and toughness. This review describes the methodologies used to obtain this new kind of DI as well as the principal mechanical properties.