| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Structure and Dynamics of Metallic Glasses
|
| Presentation Title |
Structural evolution in metallic liquids – Towards understanding universalities underlying undercooling |
| Author(s) |
Martin E. Stiehler, Mark R. Jolly, Konstantinos Georgarakis |
| On-Site Speaker (Planned) |
Martin E. Stiehler |
| Abstract Scope |
On their way towards vitrification, the evolution of the atomic structure of metallic liquids evolves in a characteristic accelerated manner. Nevertheless, these structural changes are extremely subtle compared to that of the viscosity which increases by up to 15 orders of magnitude in the same temperature interval. Comparing members from different bulk-metallic glass forming alloy families, universalities in their behaviour during undercooling was observed. Different models for their explanation have been put forward, directly linking atomistic (structure) and macroscopic (viscosity) properties. Different length scales, i.e. short-range (SRO) vs. medium range order (MRO), are evolving differently during undercooling and the subsequent glass transition. Here we discuss structural data obtained by ultrafast in-situ X-ray diffraction of aerodynamically levitated samples. Results in reciprocal as well as real space are analysed. The contribution of local as well as global influences on the structural evolution are considered. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Solidification, Phase Transformations, Other |