Thermally promoted evolution of open-volume defects and Cu precipitates in the deformed FeCu alloys

Fig. a proposes the conjecture that evolution schematic diagram of Cu precipitates and open-volume defects formed the closed “Parallelogram” shape for the (S, W) point trajectory with increasing annealing temperature in FeCu alloy. Our experimental results, supported qualitatively by theoretical calculations (Fig. b), indicate that open-volume defects were formed first after cold rolling (process I), follow by the Cu precipitation and recovery of open-volume defects (processes II and III), Cu precipitates recovered at the end (process IV). We focused on thermally promoted evolution of open-volume defects and Cu precipitates and analyzed the interaction of Cu atoms and vacancies by the view point of S-W relationship.455