About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
|
Symposium
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Heterostructured and Gradient Materials (HGM IV): Tailoring Heterogeneity for Superior Properties
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Presentation Title |
Enhanced Mechanical Properties in 3D Interface Metallic Multilayers |
Author(s) |
Justin Y. Cheng, Jon Kevin Baldwin, Nan Li, Shuozhi Xu, Irene Jane Beyerlein, Nathan Allan Mara |
On-Site Speaker (Planned) |
Justin Y. Cheng |
Abstract Scope |
The role of nanoscale interfacial gradients in enhancing mechanical properties is a topic that is not been fully explored. Here we introduce nanoscale chemical and structural inhomogeneities in 3 dimensions at heterophase interfaces in Cu/Nb nanolaminates to form 3D interfaces. These materials are ideal for studying defect-gradient interface interactions due to their high interfacial content and ability to consistently vapor deposit materials with known chemistry and microstructure. We have found that the introduction of nanoscale 3D interfaces strengthens Cu/Nb in micropillar compression perpendicular to the interfaces without sacrificing deformability. We investigate the origins of this phenomenon by performing micropillar compression tests in isostrain, isostress, and 45° tilted loading conditions. These conditions quantify the barriers facing interfacial shear and shear transfer across interfaces, allowing us to explain how shear localization is mediated by defects in 3D interface Cu/Nb under different loading conditions. |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, Composites, Thin Films and Interfaces |