Modeling the flow curve of hot deformed austenite under industrial rolling conditions

A 0.02%C plain carbon steel and a 0.11%C Nb-modified steel were tested in compression in the austenite temperature range.The critical strains for the initiation of dynamic recrystallization were determined from the 41 stress-strain curves obtained,using the double differentiation method.The work hardening behavior up to the critical strain was analyzed with the aid of a dislocation density model and the work hardening parameters r and h were derived in this way.These parameters were used to model the austen...