Effect of austenite microstructure and cooling rate on transformation characteristics in a low carbon Nb-V microalloyed steel

▶ Transformation behavior in a Nb-V microalloyed steel. ▶ Recrystallized and unrecrystallized austenite CCT diagrams constructed. ▶ Plastic deformation of austenite accelerates both ferrite and bainite transformations. ▶ Plastic deformation of austenite leads to final microstructure refinement. ▶ Differences between mean and grain distribution tail sizes in bainite.