About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
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Characterization of Minerals, Metals and Materials 2022
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Presentation Title |
L-17: Devitrification Behavior of Al-RE based Ternary Metallic Glasses |
Author(s) |
Emel Erdal, Doguhan Sariturk, Can Okuyucu, İlkay Kalay, Yunus Eren Kalay |
On-Site Speaker (Planned) |
Doguhan Sariturk |
Abstract Scope |
Aluminum-Rare Earth-based marginal metallic glasses have been recently received great attention due to their unusual devitrification behavior. The population of nanocrystals developed in the amorphous matrix can reach 1024m-3 upon crystallization, which cannot be explained by classical nucleation theory. Our previous studies on binary Al-RE have shown that the topological medium-range order is effective in the formation of nanocrystals. In this study, we have examined the effects of chemical order on a devitrified microstructure. Al90Sm5Tb5 and Al90Y5Tb5 ternary metallic glasses were investigated by DSC, TEM, synchrotron radiation, and atom probe tomography. It was observed that although the total amount of RE is constant, the substitution of Tb with 5% of Y or Sm has changed the devitrification path. The traditional nanocrystallization reaction was found to be altered in Al90Sm5Tb5 alloys. The corresponding transformation pathways with respect to the change in chemical and topological orders will be discussed in detail. |
Proceedings Inclusion? |
Planned: |
Keywords |
Characterization, |