“FIGURE 1. Schematic representation of dynamic recrystallization in a deforming polycrystal. (a) Dislocations accumulate heterogeneously under an applied stress. (b and c) High-strain relict grains (gray) are progressively consumed by the nucleation of strain-free recrystallized grains (white), formed by grain boundary bulging (red arrows) and subgrain rotation (yellow arrows) nucleation mechanisms, causing an increase in the recrystallized fraction, X.”
https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2018JB016201