About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Characterization Techniques for Quantifying and Modeling Deformation
|
| Presentation Title |
In Situ Study of Kink Banding in Cu/Nb Nanolaminates |
| Author(s) |
Yifan Zhang, Nan Li, Matthew M. Schneider, Laurent Capolungo, Rodney J McCabe |
| On-Site Speaker (Planned) |
Yifan Zhang |
| Abstract Scope |
Nano metallic laminates (NMLs) have distinct failure modes due to their inherent mechanical property anisotropies. Kink banding is one of the common failure modes observed in NMLs under layer-parallel compression. However, an in-depth understanding of the mechanisms of kink band formation is currently lacking. In this work, deformation behaviors of Cu/Nb NMLs are investigated by in situ micro pillar compression along a layer-parallel direction. The nucleation and propagation of kink bands in Cu/Nb NMLs are recorded and analyzed with respect to the stress-strain responses. Post-mortem S/TEM, TKD, and HR-EBSD analyses reveal a hierarchical microstructural evolution and defect distribution induced by kink banding. For instance, abundant low angle grain boundaries and geometrical necessary dislocations were observed near the kink band boundaries. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Mechanical Properties, Other |