| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Grain Boundaries and Interfaces: Metastability, Disorder, and Non-Equilibrium Behavior
|
| Presentation Title |
Percolation Behavior of Three-dimensional Grain Boundary Networks |
| Author(s) |
Jiwoong Kang, Ashwin J Shahani |
| On-Site Speaker (Planned) |
Jiwoong Kang |
| Abstract Scope |
The connectivity of grain boundaries plays a critical role in many intergranular phenomena, including corrosion, cracking, and liquid metal embrittlement. To characterize the complex structure of the grain boundary network, Schuh and others have invoked standard percolation theory based on a simulated microstructure with an arbitrarily imposed grain topology. To generalize these results to real materials, we have experimentally probed the three dimensional (3D) grain boundary network in Al-3.5wt%Cu as a model system via laboratory-based X-ray diffraction-contrast tomography. The 3D data and the scaling laws of percolation theory enable us to quantify the percolation threshold and compare to simulation and theory. We find self-consistent percolation thresholds using different order parameters. Furthermore, we confirm a reasonable agreement between results from our 3D experiments and other simulations when grain topology is normalized. Further work is underway to achieve larger 3D grain maps to avoid potential bias from limited size of data. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Aluminum, |