About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Theory and Design of Metallic Glasses
|
| Presentation Title |
Structural Homogeneity as a Signature of the Ideal Metallic Glass State |
| Author(s) |
Minhazul Islam, Sang-Chul Lee, Geun Hee Yoo, Ji Young Kim, Muchen Wang, Yue Fan, Yunzhi Wang, Robert Maass, Eun Soo Park, Hee-Suk Chung, Jinwoo Hwang |
| On-Site Speaker (Planned) |
Jinwoo Hwang |
| Abstract Scope |
We present that metallic glass compositions exhibiting a higher degree of structural homogeneity, measured by 4D-STEM, are closer to the proposed ideal glass state, a concept recently introduced through pair distribution function (PDF) studies. Unlike binary and eutectic ternary Zr-based glasses, we show that hypoeutectic and five-component Vitreloy compositions exhibit significantly greater structural homogeneity, characterized by an almost complete absence of crystalline-like medium range order (MRO) and accompanied by longer coherence lengths measured by PDF. Using experimental data and atomistic simulation, we show the mechanism by which the degree of homogeneity relates to a structure closer to the ideal glass state. We also connect these findings to mesoscale simulations to gain insight into the most critical length scale that governs the deformation of metallic glasses. Finally, we clarify how different definitions of MRO across experimental techniques are related, offering a unified view of how structural homogeneity connects across length scales. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Machine Learning, Mechanical Properties |