| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Burgers Circuit Analysis of Grain Boundary Junctions |
| Author(s) |
Ian Winter, Robert Rudd, Tomas Oppelstrup, Timofey Frolov |
| On-Site Speaker (Planned) |
Ian Winter |
| Abstract Scope |
Line defects at grain boundaries are recognized to be important in understanding grain growth, phase transformations and deformation in polycrystals. These defects interact with each other through their elastic fields. To describe these interactions, it is important to quantify the possible dislocation content of these defects. We propose a general method to calculate the Burgers content of line defects at grain boundary junctions. We apply this method to three different line defects in grain boundaries: grain boundary phase junctions, facet junctions, and triple junctions. We show that all of these junctions can possess Burgers content, which has contributions from excess grain boundary properties, meaning that crystallography alone does not determine possible Burgers vectors. The quantification of these line defects has potentially significant implications for how interface dynamics are modeled. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. |
| Proceedings Inclusion? |
Planned: |