| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Defect and Phase Transformation Pathway Engineering for Desired Microstructures
|
| Presentation Title |
Interactions between Lattice Dislocations and 3D Metallic Interfaces |
| Author(s) |
Shuozhi Xu, Justin Y. Cheng, Nathan A. Mara, Irene J. Beyerlein |
| On-Site Speaker (Planned) |
Shuozhi Xu |
| Abstract Scope |
In metallic systems, 3D interfaces are heterophase interfaces that extend out of plane into the two crystals. Unlike 2D sharp interfaces across which the material properties change abruptly, the 3D interfaces provide a smoother intergranular transition in material properties. In addition, a 3D interface itself is chemically and crystallographically dissimilar from the two crystals that join. While many numerical studies of the interactions between dislocations and 2D interfaces have been conducted, much fewer efforts were devoted to 3D interfaces in the same context. Here, we focus on the nanolayered Cu/Nb containing interfaces with 3D character. The interactions between dislocations and 3D interfaces are simulated via a phase-field dislocation dynamics (PFDD) method informed by atomic-level calculations. In PFDD, the heterogeneities with a general geometry and plastic deformation on general slip planes progress hand in hand. Selected simulation results are benchmarked against atomistic simulations and analytical solutions. |
| Proceedings Inclusion? |
Planned: |