The three components in equilibrium at this temperature are Austenite, g, with the composition Fe - 0.77 wt % C, Ferrite, a, with the composition Fe - 0.22 wt % C, and the compound Fe3C with the ...

This phenomenon involves the transformation of austenite (a face-centered cubic phase of iron) into ferrite (a body-centered cubic phase) during thermomechanical processes such as rolling and forging.

Before transforming to pearlite, this material phases through the two-phase zone (yellow) between austenite and ferrite. In cooling through this zone, ferrite is precipitated on the austenite grain ...