About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Advanced Characterization Techniques for Quantifying and Modeling Deformation
|
Presentation Title |
Quantifying Microstructural Evolution in Polycrystals |
Author(s) |
Gregory S. Rohrer, Robert Suter, Zipeng Xu, Aditi Bhattacharya |
On-Site Speaker (Planned) |
Gregory S. Rohrer |
Abstract Scope |
Using high-energy diffraction microscopy, we have measured the microstructures of Ni and Fe polycrystals at multiple times during annealing. Thousands of grains and grain boundaries were tracked and their velocities and curvatures were classified by their crystallographic characteristics. Among the findings, two are noteworthy and will be discussed in this talk. First, the velocities vary with all five crystallographic grain boundary parameters. Second, grain boundary velocity is independent of grain boundary mean curvature. Because curvature is thought to be an important component of the driving force, velocity and curvature are expected to be correlated positively. However, the evidence for such a correlation is poor. An alternate mechanism for reducing the total grain boundary energy, based on the anisotropy of the grain boundary energy, will be discussed. |
Proceedings Inclusion? |
Planned: |
Keywords |
Other, |