About this Abstract |
| Meeting |
MS&T26: Materials Science & Technology
|
| Symposium
|
Grain Boundaries, Interfaces, and Surfaces: Fundamental Structure-Property-Performance Relationships
|
| Presentation Title |
Tracing Recrystallization Nucleation Pathways in High-Purity Aluminum by In-Situ EBSD |
| Author(s) |
Zehua Liu, Marc De Graef |
| On-Site Speaker (Planned) |
Zehua Liu |
| Abstract Scope |
In-situ EBSD was used to investigate the early-stage recrystallization mechanism in high-purity aluminum. Recrystallization nucleation was found to occur mainly at prior grain boundaries and deformation bands, where stored energy is locally high. To better resolve these regions, orientation similarity maps generated by dictionary indexing were used to identify high-energy storage zones and residual subgrain boundary networks. The results show that a grain boundary associated with a recrystallizing grain at an early stage can remain inside the recrystallized grain at a later stage, providing direct evidence of the recrystallization pathway. The residual subgrain boundary network preserved in partially recrystallized grains is interpreted as a structural record of previous recrystallization events. In addition, abnormal growth of subgrains from this residual network was observed, indicating abnormal subgrain growth. These findings improve understanding of recrystallization nucleation mechanisms in deformed high-purity aluminum. |