Recrystallization in 304 Austenitic Stainless Steel

Authors

A Dehghan-Manshadi, University of WollongongFollow
H Beladi, Deakin University
M R. Barnett, Deakin University
P D. Hodgson, Deakin University

RIS ID

26523

Publication Details

Dehghan-Manshadi, A., Beladi, H., Barnett, M. R. & Hodgson, P. D. (2004). Recrystallization in 304 Austenitic Stainless Steel. Materials Science Forum, 467-470 1163-1168.

Abstract

A 304 austenitic stainless steel was deformed using hot torsion to study the evolution of dynamic recrystallization (DRX). The initial nucleation of dynamically recrystallization occurred by the bulging of pre-existing high angle grain boundaries at a strain much lower than the peak strain. At the peak stress, only a low fraction of the prior grain boundaries were covered with new DRX grains. Beyond the peak stress, new DRX grains formed layers near the initial DRX and a necklace structure was developed. Several different mechanisms appeared to be operative in the formation of new high angle boundaries and grains. The recrystallization behaviour after deformation showed a classic transition from strain dependent to strain independent softening. This occurred at a strain beyond the peak, where the fraction of dynamic recrystallization was only 50%.