About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
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| Symposium
|
Chemistry and Physics of Interfaces
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| Presentation Title |
Slip band development in Cu/Nb nanolaminates with thick 3D interfaces
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| Author(s) |
Nico Fuchs-Lynch, Mauricio De Leo, Remi Dingreville, Nathan Mara, Irene Beyerlein |
| On-Site Speaker (Planned) |
Nico Fuchs-Lynch |
| Abstract Scope |
Bimetallic nanolaminates exhibit high strength but typically suffer from reduced deformability. In Cu/Nb, this tradeoff is mitigated by introducing thick 3D interfaces, which simultaneously enhance strength and deformability. Origins of 3D interface strengthening are well documented, yet the mechanisms driving increased deformability remain unexplored. To address this, we use the slip band fast-Fourier transform (SB-FFT) model to simulate slip band evolution in the Cu/Nb system for various nanolaminate configurations, comparing conventional sharp (2D) with thick 3D interfaces. Our simulations suggest that slip will localize first in the Cu nanolayer (0.4% less plastic strain than in Nb) . Compared to a 2D interface, 3D interfaces increase the applied stress required for Cu-to-Nb slip transmission (by 17.6%) and for independent Nb slip band formation (by 6.6%). By delaying these events which otherwise drive large lattice rotations and shear instabilities, the 3D interfaces effectively preserve the material’s deformability. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Modeling and Simulation, Thin Films and Interfaces, Computational Materials Science & Engineering |