About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Deformation Mechanisms, Microstructure Evolution, and Mechanical Properties of Nanoscale Materials
|
| Presentation Title |
Dislocation Transmission across 3D Interfaces in Cu/Nb Nanolaminates |
| Author(s) |
Shuozhi Xu, Justin Y. Cheng, Mauricio De Leo, Nathan A. Mara, Irene J. Beyerlein |
| On-Site Speaker (Planned) |
Shuozhi Xu |
| Abstract Scope |
In metallic systems, 3D interfaces are heterophase interfaces with nanoscale thickness and contain the chemical elements of the two adjacent crystals, from which the interfaces can be chemically and/or structurally distinct. Unlike 2D sharp interfaces across which the material properties change abruptly, the 3D interfaces provide a smoother intergranular transition in material properties. Numerical approaches for materials containing 3D interfaces need to account for multiple phases, which is challenging. Here, we advance a phase-field dislocation dynamics (PFDD) model to treat materials consisting of phases differing in composition, structural order, and size in the same system. In this model, the heterogeneities with a general geometry and plastic deformation on slip planes progress hand in hand. We then apply PFDD to studying the transmission of dislocations across 3D interfaces in Cu/Nb nanolaminates. Selected simulation results are compared against experiments. Origins of the enhancement in strength and plasticity in the nanolaminates are discussed. |
| Proceedings Inclusion? |
Planned: |