| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanical Behavior at the Nanoscale V
|
| Presentation Title |
Bending Dominated Plasticity and Hardening in Au-Ag Nanoboxes |
| Author(s) |
Radhika Patil, David Doan, Zachary Aitken, Chen Shuai, Mehrdad Kiani, Yong-Wei Zhang, Wendy Gu |
| On-Site Speaker (Planned) |
Radhika Patil |
| Abstract Scope |
Porous, nano-architectured metallic structures with characteristic dimensions of ~10 nm are valuable as strong, stiff and lightweight materials, but are difficult to fabricate and test experimentally. Here we colloidally synthesize hollow Au-Ag nanoboxes with smooth and rough surfaces. These structures are hollow cubes with overall dimensions of ~140 nm and wall thickness of ~15 nm. The smooth and rough nanoboxes yield at 130 ± 45 MPa and 96 ± 31 MPa stress, respectively. Both samples show strain hardening with rough nanoboxes having higher hardening rate than the smooth nanoboxes. We use finite element modelling to determine the influence of structural architecture on deformation and find that structural geometry is not responsible for the observed strain hardening. Using molecular dynamic simulations, we find that the nucleation and interaction of stacking faults is responsible for hardening. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |