About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
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| Symposium
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Mechanical Behavior at the Nanoscale VIII
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| Presentation Title |
Phase Field Modeling of Slip Transfer in Thick Biphase Interfaces in FCC/BCC Nanolaminates
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| Author(s) |
Nico Fuchs-Lynch, Mauricio De Leo, Shuozhi Xu, Justin Cheng, Nathan Mara, Irene Beyerlein |
| On-Site Speaker (Planned) |
Nico Fuchs-Lynch |
| Abstract Scope |
Diffuse “3D interfaces,” which extend in 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 these Cu/Nb 3D interfaces. Two approximations for the 3D interface are considered: a compositional gradient containing alloyed sublayers, with and without amorphous precipitates. 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 specific slip systems and critical stresses for propagation across the 3D interface are predicted. The effect of a two-dislocation pileup is investigated. Results show a significant thickness-dependent size effect on slip transfer, orientation dependence, a strong correlation with the unstable stacking fault energy (USFE), and a significant contribution from the amorphous precipitates. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, Modeling and Simulation, Characterization |