Abstract
The phase transformation of austenite to ferrite in Fe-C-Mn system is studied by varying systematically concentration of C and Mn using DICTRA software. Ferrite kinetics is controlled by the partitioning of elements between ferrite and austenite phases. The elements that stabilize austenite phase tend to partition more towards the austenite phase as compared to the ferrite phase. The ferrite fraction, the rate of migration of the interface and the partitioning of elements between austenite and ferrite phases are evaluated by varying concentration of C and Mn in Fe-C-Mn system. The fraction of ferrite decreases with the increase in concentration of C and Mn. These elements influence ferrite kinetics through a growth process which occurs either under partition local equilibrium mode or negligible partition local equilibrium mode. The results show that both Mn and C retard ferrite transformation in Fe-C-Mn alloy. It is possible to get the desired fraction of ferrite by controlling the relative concentration of C and Mn.
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