|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Advanced Characterization Techniques for Quantifying and Modeling Deformation
||In Situ Study of Kink Banding in Cu/Nb Nanolaminates
||Yifan Zhang, Nan Li, Matthew M. Schneider, Laurent Capolungo, Rodney J McCabe
|On-Site Speaker (Planned)
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.
||Characterization, Mechanical Properties, Other