| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Probing Defect Properties and Behavior under Mechanical Deformation and Extreme Conditions
|
| Presentation Title |
In-situ Study of Failure Defects in Cu/Nb Nanolaminates under Deformation |
| Author(s) |
Yifan Zhang, Nan Li, Laurent Capolungo , Matt Schneider, Rodney J. McCabe |
| On-Site Speaker (Planned) |
Yifan Zhang |
| Abstract Scope |
Mechanical properties of materials are strongly influenced by interfaces that are barriers and sources for defects. Nano-metallic laminates (NMLs), containing abundant and tailorable interfaces, are of great importance to understand defect-interface interactions. However, the anisotropic deformation modes and failure mechanisms of NMLs are less explored. In this work, deformation behaviors of Cu/Nb NMLs are investigated by using in situ compression both at micron scale (in situ SEM) and nano scale (in situ TEM) along layer-parallel and layer-normal directions. The nucleation and propagation of failure defects, such as kink band and shear band, during the deformation are recorded and analyzed with respect to stress-strain responses. Postmortem S/TEM, high-resolution TKD analyses reveal the failure-induced hierarchical microstructure evolution and defects distributions. Our study may advance the design of strong and failure resistant structure materials |