Subdivision of Dynamic Recrystallization Mechanism in the Transition Zone and Microstructure Evolution of Incoloy825 Alloy

Abstract

The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/adem.202101348.

Thermal Deformation Characteristics and Dynamic Recrystallization Mechanism of Incoloy 800H Alloy under Different Deformations

“…The continuous accumulation of dislocations within the deformed grains leads to the dislocation density reaching the threshold for the formation of DRX, dislocations form CDRX grains through the route of “dislocation cell—subgrain—DRX nuclei”. [ 39 ] Compared with the KAM maps in Figure 8d,e, it can be observed that the high dislocation density inside the grains where CDRX occurs is due to the continuous creation of dislocations during the progressive rotation of the grains. Dislocations in the initial grains form dislocation cells surrounded by LAGBs through slip, annihilate, and rearrange, as marked region in the TEM image of Figure 9c.…”

“…According to AZtecCrystal software, the GOS under different degrees of deformation was statistically analyzed, as shown in Figure 5a. Due to the lower GOS value of DRX grains than deformed grains, based on the experience of previous research [38][39][40][41] and the statistics of the collected data, a threshold value of 1.2°was used to separate recrystallized grains and deformed grains in this study.…”