| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Structure-Property Relationships of Bulk Metallic Glasses
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| Presentation Title |
Transition from Collective to Individual Atomic Transport in Nanosized Amorphous Metals |
| Author(s) |
Sungwoo Sohn, Naijia Liu, Minyoung Na, Gihoon Park, Arindam Raj, Guannan Liu, Sebastian Kube, Fusen Yuan, Yanhui Liu, Jan Schroers |
| On-Site Speaker (Planned) |
Sungwoo Sohn |
| Abstract Scope |
Deformation in amorphous metals poses a fundamental challenge in mechanics and materials science. This study investigates the size-dependent deformation behavior of amorphous metals, focusing on scales below 100 nm. Our findings reveal a transition in the underlying deformation mechanism, deviating significantly from the viscous flow. With decreasing size, the deformation rate increases, accompanied by composition shifts. This transition suggests a shift from collective atomic transport through viscous flow to individual atomic transport via diffusion. The critical length scale for this transition is temperature-dependent, peaking at the glass transition. Notably, the element with the highest diffusivity deforms the fastest, inducing composition changes during deformation. These insights provide novel perspectives on nano-mechanics and the physics of amorphous metals, with potential implications for the epitaxial growth of metallic glasses. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, |