Carbon partitioning and mechanis of bainite reaction in experimental FE-CR-MO-C steel

Carbon partitioning and mechanism of bainite transformation have been studied in Fe-Cr-Mo-C steel using high speed dilatometry backed by thermodynamic analysis. Obtained results confirm the incomplete reaction phenomenon with the cessation of the bainite transformation well before paraequilibrium is achieved. These experimental data indicate that bainitic ferrite forms by a displacive transformation mechanism, but soon afterwards, excess of carbon is partitioned into the residual austenite. The results are discussed in terms of the mechanism of bainite transformation.