The onset of DRX can also be detected from inflection point in plots of the strain hardening rate against stress.
It has been shown that this technique can be used to establish the occurrence of DRX when this cannot be determined unambiguously from the shape of the flow curve.
The particular stress behavior before reaching the steady state depends on the initial grain size, temperature, and strain rate.
DRX can occur in various forms, including: Dynamic recrystallization is dependent on the rate of dislocation creation and movement.
[2] Some authors have used the term 'postdynamic' or 'metadynamic' to describe recrystallization that occurs during the cooling phase of a hot-working process or between successive passes.
This emphasises the fact that the recrystallization is directly linked to the process in question, while acknowledging that there is no concurrent deformation.
[3] Geometric Dynamic Recrystallization has 6 main characteristics:[3] While GDRX is primarily affected by the initial grain size and strain (geometry-dependent), other factors that occur during the hot working process complicate the development of predictive modeling (which tend to oversimplify the process) and can lead to incomplete recrystallization.
In practice, a generally sinusoidal edge (as predicted by Martorano et al.) gradually forms as the grains begin to pinch off as they each reach the threshold.
[4] More sophisticated models consider complex initial grain geometries,[5] local pressures along grain boundaries, and hot working temperature,[4] but the models are unable to make accurate predictions throughout the entire stress regime and the evolution of the overall microstructure.
This new, larger grain will require far more deformation for GDRX to occur, and the local area will be weaker rather than strengthened.
If the bulge achieves a critical radius, it will successfully transition to a stable nucleus and continue its growth.
As deformation continues, the recrystallization does not maintain coherency between layers of new nuclei, producing a random texture.
The models are derived for the systems with single peak, i.e. for the materials with medium to low stacking fault energy values.
I. e. the ensemble model describes the transition between single and multi peak behavior based on the initial grain size.