Abstract
The texture variations associated with the occurrence of dynamic recrystallization (DRX) during the high temperature torsion of a Ti interstitial-free steel were examined. Both texture formation mechanisms of DRX were considered: i.e. oriented nucleation as well as selective growth. These processes were simulated with the aid of a self-consistent polycrystal model that takes crystallographic glide and DRX into account and also allows for the grain shape changes that take place during deformation. To handle the variations in volume fraction associated with the different orientations caused by DRX, the so-called volume transfer scheme was employed. By comparing the texture predictions with the experimental observations, it is shown that the self-consistent model reproduces the DRX textures more faithfully than previous relaxed constraint models. The results also indicate that the main texture formation mechanism during DRX is oriented nucleation followed by generalized growth. By contrast, selective growth, as modelled in terms of coincident site lattice rotations or plane matching, appears to be of little importance under the present conditions.
Published Version
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