Kinetics of static recrystallization and strain induced martensite formation in low carbon austenitic steels using impulse excitation technique

Abstract

The defect recovery and recrystallization as well as the strain induced martensite formation in heavily cold rolled 316L austenitic steel has been investigated using Impulse excitation technique. It has been observed that the amount of strain induced martensite is small even after 80% cold rolling and hence the martensite reversion do not alter the elastic modulus to any significant extent during annealing. On the other hand the stored energy of deformation as well as the subsequent annealing phenomenon like recovery and recrystallization has significant effect on the elastic properties of these alloys. The measured temperature variation of elastic moduli data during recovery and recrystallization has been analyzed using the empirical Kolmogorov-Johnson-Mehl-Avrami (KJMA) modelling framework to obtain the kinetic parameters in the steel.