About this Abstract |
Meeting |
2016 TMS Annual Meeting & Exhibition
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Symposium
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Bulk Metallic Glasses XIII
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Presentation Title |
Local Ordering in Molten State and Its Legacy on Abnormal Primary Crystallization in Al-RE Metallic Glasses |
Author(s) |
Mustafacan Kutsal, |
On-Site Speaker (Planned) |
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Abstract Scope |
Presence of short-to-medium range nanoscale local chemical and topological ordering in both liquid and amorphous solid states play a crucial role in the phase selection hierarchy and the microstructure evolution in metallic glassy systems. In this respect, we have used in-situ synchrotron XRD, atom probe tomography (APT), differential thermal analyzer (DTA), ab-initio and Reverse Monte Carlo (RMC) modelling to describe the glassy and molten states of Al-RE (RE: Sm and Tb) in their glass formation compositional ranges. We have shown that the structural heterogeneities in the amorphous solid are inherited from the molten state which revealed itself in both in-situ XRD and corresponding RMC results. We have shown direct structural evidence of clusters similar to the short range order in tetragonal Al11RE3 in the molten state. This hidden structure was found to evolve with respect to temperature. Evolution of SRO and MRO clusters with temperature will be discussed in detail. |
Proceedings Inclusion? |
Planned: A print-only volume |