About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
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Symposium
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Deformation Mechanisms, Microstructure Evolution, and Mechanical Properties of Nanoscale Materials
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Presentation Title |
The Effect of Annealing on the Mechanical Behaviors and Failure Mechanisms of Nano Metallic Laminates |
Author(s) |
Yifan Zhang, Rodney J. McCabe, Jonathan G Gigax, Nan Li, Thomas J. Nizolek, John S. Carpenter, Matthew M. Schneider, Laurent Capolungo |
On-Site Speaker (Planned) |
Rodney J. McCabe |
Abstract Scope |
Nanometallic laminates (NMLs) exhibit high strength with limited work hardenability and can fail via different modes depending on loading conditions. Here, we investigate the effects of annealing on the mechanical properties of Cu/Nb and Ag/Fe NMLs using meso-scale tension and in situ micro pillar compression tests and through microstructure characterizations by S/TEM and transmission Kikuchi diffraction (TKD). Analyses show that annealing can reduce the initial intralayer dislocation density, change grain and layer morphology, and facilitate uniform deformation. Before annealing, as-rolled Cu/Nb NMLs exhibit little capacity for work hardening during tension and zero ductility for ND tension with failure occurring before yield via intergranular crack propagation within Nb layers. Annealing enhances the work hardenability, ductility, and fracture toughness with moderate decreases to overall strength of Cu/Nb NMLs. Annealing also affects the kinking propensity in Ag/Fe NMLs, by increasing the kink band (KB) onset strain, decreasing KB probability and load drop magnitude. |
Proceedings Inclusion? |
Planned: |
Keywords |
Characterization, Mechanical Properties, Composites |