Simulation of the Growth of Austenite from As-Quenched Martensite in Medium Mn Steels

• DOI: 10.1007/s11661-018-4497-3
• Publication Date: 2018-02-07T15:13:39Z
• Authors: Fei Huyan; Jia-Yi Yan; Lars Höglund; John Ågren; Annika Borgenstam
• Keywords: Lath

Abstract As part of an ongoing development third-generation advanced high-strength steels with acceptable cost, austenite reversion treatment medium Mn becomes attractive because it can give rise to a microstructure fine mixture ferrite and austenite, leading both high strength large elongation. The growth during intercritical annealing is crucial for the final properties, primarily determines fraction, composition, phase stability austenite. In present work, from as-quenched lath martensite in has been simulated using DICTRA software package. Cementite added into simulations based on experimental observations. Two types systems (cells) are used, representing, respectively, (1) cementite forming apart each other, (2) cementite/martensite interface. An interfacial dissipation energy also take account finite interface mobility. first type setup addition able reproduce observed reasonably well.