About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
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Local Ordering in Materials and Its Impacts on Mechanical Behaviors, Radiation Damage, and Corrosion
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Presentation Title |
The Effects of Local Order in Molten Metals on Glass Formation |
Author(s) |
Doğuhan Sarıtürk, Can Okuyucu, Yunus Kalay |
On-Site Speaker (Planned) |
Doğuhan Sarıtürk |
Abstract Scope |
Partial devitrification of the Al-RE marginal metallic glasses results in an anomalous nucleation rate of nanocrystals embedded in an amorphous matrix. An exact explanation for the mechanism underlying the formation of highly populated nanocrystals is still missing. We previously investigated the as-quenched structure in detail and found that some medium-range order (MRO) clustering is responsible for the nanocrystallization of fcc-Al after devitrification. In this study, we investigated the local order in liquid by the use of MD simulations with EAM potential to reveal the structural evolution in molten Al-RE (RE: Sm, Tb) within their glass formation range. We found that the MRO observed in the as-quenched structure originated from the molten state which controls the glass formation in marginal metallic glass formation. The corresponding change in viscosity and its effect on the formation of local ordering in liquid were investigated by Green-Kubo Viscosity and cluster analyses, respectively. |
Proceedings Inclusion? |
Planned: |
Keywords |
Modeling and Simulation, Solidification, Characterization |