| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanical Response of Materials Investigated Through Novel In-Situ Experiments and Modeling
|
| Presentation Title |
Phase field modeling of slip transfer in thick biphase interfaces in HCP/BCC nanolaminates |
| Author(s) |
Nicolas Fuchs-Lynch, Shuozhi Xu, Mauricio De Leo, Pulkit Garg, Nathan Mara, Irene Beyerlein |
| On-Site Speaker (Planned) |
Nicolas Fuchs-Lynch |
| Abstract Scope |
Diffuse “3D interfaces,” which extend into the direction normal to the interface plane, increase strength while maintaining ductility in Cu/Nb nanolaminates. In this work, phase field dislocation dynamics (PFDD) modeling is used to simulate slip transfer across Ti/Nb 3D interfaces. Two approximations for the 3D interface are discussed: a homogeneous 50-50 Ti/Nb alloy and a compositional gradient containing alloyed sub-layers. The crystal structures, elastic constants and stacking fault energies are determined as a function of composition using atomistic simulations, which are utilized as inputs to the PFDD model. Edge dislocation dipoles are initiated on a specific slip system and critical stresses for propagation across the 3D interface are predicted. Results show a significant size effect of thickness on slip transfer, as well as an orientation dependence and a strong correlation with the unstable stacking fault energy (USFE). Characterization and mechanical testing of sputtered Ti/Nb nanolaminates with 3D interfaces are discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Modeling and Simulation, Thin Films and Interfaces, Mechanical Properties |