| Abstract Scope |
Duplex-type steels are of research interest due to the potential for these microstructures to simultaneously exhibit high strength and toughness. During thermal treatments such as intercritical annealing (IA) or quench, lamellarization, and tempering (QLT), segregation of manganese, nickel, and carbon to newly formed austenite enables retention upon cooling to room temperature. The austenite can undergo various deformation mechanisms which can significantly affect the mechanical properties; however, the effects of austenite characteristics on mechanical performance are not well understood. In the present work, a database recorded various metrics from tensile and Charpy V-notch (CVN) testing as well as experimental characterization results for various austenite characteristics in the corresponding microstructures. The database was used to understand correlations between various austenite characteristics and both tensile and CVN metrics. While the literature-sourced experimental data had limitations, trends were ascertained that may guide alloy and heat treatment design for duplex steels. |