| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Characterization of Minerals, Metals and Materials 2024: Process-Structure-Property Relations and New Technologies
|
| Presentation Title |
Advanced Characterization of the Local Topological and Chemical Order in Marginal Metallic Glasses |
| Author(s) |
Yunus Kalay, Can Okuyucu, Doğuhan Sarıturk, İlkay Kalay |
| On-Site Speaker (Planned) |
Yunus Kalay |
| Abstract Scope |
Unlike bulk metallic glasses (BMG), marginal metallic glasses (MMG) have a partially ordered atomic arrangement with short-range order. This partial ordering introduces a degree of crystalline-like behavior while still retaining glassy characteristics. In this study, selected candidates Al-RE (RE: Sm, Tb, Y) MMGs were produced by gas atomization, melt spinning, and laser ablation methods, representing different cooling rates and undercooling values and, thus, local structure arrangements. The corresponding atomic structure and local ordering of Al-RE MMGs were characterized using transmission electron microscopy, fluctuation electron microscopy, and atom probe tomography. The results showed that undercooling directly affects the formation of the fcc-like medium-range order rearrangement and nucleation of the nanocrystals during solidification. In this talk, we discuss how controlling the cooling rate and undercooling can influence the resulting medium-range order in amorphous structure and emerging properties of the MMG. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Phase Transformations, Aluminum |