A. Hildenbrand et al., Self-consistent polycrystal modelling of dynamic recrystallization during the shear deformation of a Ti IF steel, ACT MATER, 47(2), 1999, pp. 447-460
The texture variations associated with the occurrence of dynamic recrystall
ization (DRX) during the high temperature torsion of a Ti interstitial-free
steel were examined. Both texture formation mechanisms of DRX were conside
red: i.e. oriented nucleation as well as selective growth. These processes
were simulated with the aid of a self-consistent polycrystal model that tak
es crystallographic glide and DRX into account and also allows for the grai
n shape changes that take place during deformation. To handle the variation
s in volume fraction associated with the different orientations caused by D
RX, the so-called volume transfer scheme was employed. By comparing the tex
ture predictions with the experimental observations, it is shown that the s
elf-consistent model reproduces the DRX textures more faithfully than previ
ous relaxed constraint models. The results also indicate that the main text
ure formation mechanism during DRX is oriented nucleation followed by gener
alized growth. By contrast, selective growth, as modelled in terms of coinc
ident site lattice rotations or plane matching, appears to be of little imp
ortance under the present conditions. (C) 1999 Acta Metallurgica Inc. Publi
shed by Elsevier Science Ltd. All rights reserved.