About this Abstract |
Meeting |
2024 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 |
Interfacial Free Volume Redistribution during Relaxation of a Spray Deposited Amorphous Alloy |
Author(s) |
Jason Trelewicz, Jonathan Gentile, Bin Cheng, David J. Sprouster |
On-Site Speaker (Planned) |
Jason Trelewicz |
Abstract Scope |
Free volume modulations have been explored as a pathway for promoting a more homogeneous plastic response in metallic glasses and largely explored in a class of amorphous alloys referred to as nanoglasses that containing interfacial regions of excess free volume. Here, we employ synchrotron scattering techniques to characterize the short-to-medium range amorphous atomic network in a spray deposited Fe-based metallic glass up to the glass transition temperature. Observed variations in atomic nearest neighbor bonding are connected to atomistic simulations to elucidate the effects of amorphous interfaces on structural relaxation. The results show that annealing up to the glass transition temperature is accompanied by a global reduction in excess free volume, as expected. However, contrary to amorphous feedstock, the spray deposits retain excess free volume at interfacial regions between the amorphous matrix regions, which are shown to expand through free volume redistribution into adjacent particle cores during glass homogenization. |
Proceedings Inclusion? |
Planned: |
Keywords |
Characterization, Process Technology, Other |