About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Grain Boundaries, Interfaces, and Surfaces: Fundamental Structure-Property-Performance Relationships
|
| Presentation Title |
Sub-grain Boundary Dynamics During Early-Stage Recrystallization in High-Purity Aluminum |
| Author(s) |
Zehua Liu, Marc DeGraef |
| On-Site Speaker (Planned) |
Zehua Liu |
| Abstract Scope |
The migration of sub-grain boundaries in high purity aluminum during early-stage recrystallization was investigated. Utilizing dictionary indexing and post image registration, sub-grains are clearly revealed with in situ low voltage EBSD (electron back scatter diffraction) and ECCI (electron channelling contrast image). High resolution mapping of strain field evolution and grain boundary migration of recrystallizing grains is acquired during this process. Observations indicate that large sub-grains exist in the fast-growing recrystalizing grains and the recrystallizing grain demonstrates an irregular shape, protruding into the deformed matrix. Additionally, the growth dynamics of sub-grains and the emergence of persistent island grains were explicitly tracked. The findings suggest that the formation and persistence of island grains could be linked to specific coincident site lattice (CSL) boundaries; the type of CSL boundary might influence survival of these island grains. |