|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||Advanced High Strength Steels IV
||TBF Steels Produced by Partial Austenitization
||Ersoy Erisir, Oğuz Gürkan Bilir, Yunus Emre Sözer, Özge Ararat
|On-Site Speaker (Planned)
Carbide free bainitic steels or TRIP aided bainitic ferrite steels (TBF) are produced by two steps as controlled cooling to bainitic formation temperature from an austenitization temperature and an isothermal holding. During the bainitic transformation, austenite is expected to be stabilized by carbon partitioning. In this work, it is studied to enhance austenite stability by Mn partitioning at partial austenitization before carbon partitioning stage at the bainitic transformation. A martensitic transformation is applied to samples before the partial austenitization to assure grain refinement of fresh formed austenite and ferrite during the partial austenitization stage. Baehr dilatometer is used to reveal transformation temperatures and ThermoCalc and DICTRA are used to examine transformation behavior. XRD and FE-SEM is carried out for characterization of austenite. Tensile test was also applied for mechanical properties. A final microstructure of bainitic ferrite and austenite is possible by applying the partial austenitization.
||Planned: Supplemental Proceedings volume