Effect of Substructure Characteristics on the Dislocation Annihilation Process during Post-Deformation Annealing
Two distinct substructures were produced in a Ni-30Fe austenitic model alloy by different thermomechanical processing routes. The first substructure largely displayed organized, banded subgrain arrangements with alternating misorientations, resulting from the deformation at a strain just before the initiation of dynamic recrystallization (DRX). By contrast, the second substructure was more random in character and exhibited complex subgrain/cell arrangements characterized by local accumulation of misorientations, formed through DRX. During the post-deformation annealing, the latter substructure revealed a rapid disintegration of dislocation boundaries leading to the formation of dislocation-free grains within a short holding time, though the former largely preserved its characteristics till becoming replaced by growing statically recrystallized grains.
H. Beladi et al., "Effect of Substructure Characteristics on the Dislocation Annihilation Process during Post-Deformation Annealing", Materials Science Forum, Vol. 753, pp. 76-79, 2013