| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Heterostructured and Gradient Materials (HGM V): New Mechanistic Discoveries Enabling Superior Properties
|
| Presentation Title |
Mechanical Anisotropy Effects on Strength and Deformability in Nanolaminates Containing 3D Interfaces |
| Author(s) |
Justin Y. Cheng, Shuozhi Xu, Jon K. Baldwin, Mauricio De Leo, Irene J. Beyerlein, Nathan A. Mara |
| On-Site Speaker (Planned) |
Justin Y. Cheng |
| Abstract Scope |
Bimetallic nanolamellar composites have been studied extensively to probe the influence of interface structure on mechanical properties in nanocrystalline alloys. Previously, we have shown that Cu/Nb nanolaminates incorporating 3D interfaces (3D Cu/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 3D 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 couple these results with in situ TEM nanopillar compression and post mortem TEM of micropillar compression and 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. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Thin Films and Interfaces, Mechanical Properties, Nanotechnology |