Analysis of transformation stasis by the Gibbs energy balance (GEB) approach modified to consider carbon redistribution into remaining austenite

The Gibbs energy balance (GEB) concept for modeling the transformation stasis during isothermal ferrite formation is revisited. Modification has been made to take into account the carbon redistribution into remaining austenite and the increased carbon solubility in ferrite transformed at low temperature. Both the original and modified models adequately describe the transformation stasis in ferrite formation in alloy systems considered in earlier studies; however, the modifications proposed in the present study are critical for the reasonable description of the effect of Mn content on the transformation stasis in a medium carbon steel where the redistribution of carbon has more significant influence.