|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Bulk Metallic Glasses XIX
||A-14: A Molecular Dynamics Study of the Evolution of Medium-range Ordering in Liquid Metals
||Doguhan Sariturk, Can Okuyucu, Yunus Eren Kalay
|On-Site Speaker (Planned)
Al-Rare Earth (RE) metallic glasses have recently attracted significant attention due to their high densities of primary devitrification products and unordinary devitrification behaviors. Our previous studies have shown that Al-RE (RE: Sm, Tb) glasses produced via melt spinning and DC magnetron sputtering have similar short-range orders. Nevertheless, their devitrification behaviors altered significantly due to medium-range ordered (MRO) structures. The pre-peak at lower q-region in total structure factor of Al-RE metallic glasses is attributed to the MRO. In this study, local atomic structures of Al90Sm10 binary metallic glasses and their liquid counterparts are investigated using molecular dynamics simulations. The evolution of medium-range order is tracked from well above the liquidus temperature down to room temperature. In addition, Voronoi cluster analyses, Warren-Cowley pair analysis, and fluctuation electron microscopy simulations are carried out to identify the medium-range order present within the undercooled and liquid Al90Sm10 system.
||Modeling and Simulation, Computational Materials Science & Engineering,