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Meeting 2025 TMS Annual Meeting & Exhibition
Symposium Mechanical Response of Materials Investigated Through Novel In-Situ Experiments and Modeling
Presentation Title Strength and Deformability in Nanolaminates Containing Thick 3D Interfaces
Author(s) Nathan A. Mara, Mauricio De Leo, Nicolas Fuchs-Lynch, Justin Y. Cheng, Shuozhi Xu, Benjamin Derby, Irene Beyerlein
On-Site Speaker (Planned) Nathan A. Mara
Abstract Scope Bimetallic nanolamellar composites have been studied extensively to probe the influence of interface structure on mechanical properties in nanocrystalline alloys. We have shown that Cu/Nb nanolaminates incorporating 3D interfaces (3D Cu/Nb, 3D Ti/Nb) containing chemical, crystallographic, and structural nanoscale heterogeneities in all spatial dimensions have remarkable strength and deformability compared to 2D interface counterparts (2D Cu/Nb) under in situ micropillar compression normal to interface planes. In this work, we combine compression results at normal and 45° inclination to interfaces to show that 3D Cu/Nb behaves more isotropically than 2D Cu/Nb and that 3D interfacial shear strength exceeds that of 2D interfaces. We discuss the microstructural origin of high strength and deformability in 3D Cu/Nb in terms of dislocation-interface interactions at the atomic and nano scales using Phase Field Dislocation Dynamics to model dislocation transmission across nanolaminate bimetallic interfaces.
Proceedings Inclusion? Planned:
Keywords Mechanical Properties, Modeling and Simulation, Nanotechnology

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