|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Phase Transformations in Multi-component Systems: An MPMD Symposium Honoring Gary R. Purdy
||Austenite Reversion during Intercritical Annealing in a Medium-Mn Steel: Simulations and Experiments
||Fei Huyan, Jiayi Yan, John Ågren, Annika Borgenstam
|On-Site Speaker (Planned)
Austenite reversion from martensite during intercritical annealing in a medium Mn steel is studied by simulation and experiment. According to previous work, austenite nucle-ates and grows between martensite laths, leading to a fine mixture of austenite and fer-rite. Additionally, the austenitic phase stability can be designed to obtain a transfor-mation-induced plasticity (TRIP) effect, giving both high strength and high elongation. In this work, a model alloy Fe-0.3C-6Mn-1.5Si-1Ni-2Cu (wt%) was heat treated and characterized, and the results were compared with DICTRA simulations of a one-dimensional fcc/bcc/cementite cell. The austenitic fraction formed during reversion is much lower than prediction assuming non-partitioned local equilibrium and partitioned local equilibrium. Possible mechanisms leading to such discrepancy are discussed, and the DICTRA model is modified.
||Planned: A print-only volume