About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
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Deformation Mechanisms, Microstructure Evolution, and Mechanical Properties of Nanoscale Materials
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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: |