About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Chemistry and Physics of Interfaces
|
| Presentation Title |
The Dislocation Content of Triple Junctions |
| Author(s) |
Ian Winter, Daniel Moore, Robert Rudd, Tomas Oppelstrup, Timofey Frolov |
| On-Site Speaker (Planned) |
Ian Winter |
| Abstract Scope |
It has long been recognized that triple junctions, line defects formed by the intersection of grain boundaries, can play an important role in microstructural evolution, but there remains uncertainty regarding their properties. Triple junctions are capable of carrying dislocation content. However, no general method for calculating this content has been established. We derive the necessary equations to calculate the intrinsic dislocation content of a triple junction whose trichromatic pattern forms a coincidence site lattice. We apply this formalism to atomistic simulations of tungsten to compute the Burgers vectors of a triple junction formed during twin grain nucleation and growth from a free surface. By tracking the evolution of the triple junction's Burgers vector and its core structure, we reveal the sequence of individual line defect reactions responsible for triple-junction-mediated twin growth. SNL is managed and operated by NTESS under DOE NNSA contract DE-NA0003525. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Thin Films and Interfaces, Modeling and Simulation, |