About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
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Mechanical Behavior at the Nanoscale VI
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Presentation Title |
Orientation Dependence of Strength and Ductility in Nanolaminates Containing Interfaces with Three Dimensional Character |
Author(s) |
Justin Y. Cheng, Shuozhi Xu, Zezhou Li, Jonathan D. Poplawsky, J. Kevin Baldwin, Irene J. Beyerlein, Nathan A. Mara |
On-Site Speaker (Planned) |
Justin Y. Cheng |
Abstract Scope |
In nanolaminate composites, interface structure contributes strongly to mechanical behavior. This is due to a high density of interfaces, which can be designed to enhance mechanical properties. Recently, we have done so in Cu/Nb multilayers by introducing three dimensional (3D) interfaces between the pure constituent phases. 3D interfaces possess substantial thickness and are chemically, crystallographically, and topologically divergent from the phases that they separate. We present simultaneous enhancements in strength and plasticity arising from 3D interfaces in Cu/Nb with pure layer thickness of 10 nm. To elucidate the underlying mechanisms, we conduct cross-sectional TEM of micropillars compressed under different orientations. The link between interfacial structure and the high strength and plasticity observed will be discussed in terms of the atomic and mesoscale-level effects of collective dislocation motion in the presence of 3D interfaces. |
Proceedings Inclusion? |
Planned: |
Keywords |
Thin Films and Interfaces, Nanotechnology, Mechanical Properties |