About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanics at the Extremes: Bridging Length-Scales From Nanoscale to Bulk
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| Presentation Title |
Ti-Nb nanolaminates containing thick 3D interfaces under thermomechanical extremes |
| Author(s) |
Mauricio De Leo, Nicolas Fuchs-Lynch, Courtney Archibald, Kamila Hamulka, Benjamin Derby, Xavier Maeder, Johann Michler, Irene Beyerlein, Nathan Mara |
| On-Site Speaker (Planned) |
Mauricio De Leo |
| Abstract Scope |
Metallic nanolaminates derive their exceptional mechanical performance from the high density of interfaces that dominate deformation mechanisms at the nanoscale. While mechanical behavior at ambient conditions is an intense area of investigation, the behavior of nanolaminates at cryogenic and elevated temperatures is relatively less understood. By studying interface–dislocation interactions across temperature extremes, we establish a mechanistic framework linking interface character to plasticity in layered materials. We present the thermomechanical response of Ti/Nb nanolaminates containing interfacial gradients in composition and crystal structure in all three dimensions. In-situ SEM micropillar compression experiments cover a range of quasistatic strain rates and temperatures (cryo to ~0.5 Tm) and reveal increased strength of thick 3D interfaces over thin 2D counterparts. We utilize a Phase-Field Dislocation Dynamics (PFDD) modeling approach to describe the dislocation mechanisms responsible for enhanced strength and onset of microstructural instability, further elucidating the role of interfacial structure in governing deformation behavior. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, Thin Films and Interfaces, Modeling and Simulation |