About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
High Entropy Alloys VIII
|
Presentation Title |
Connecting Chemical and Structural Order in High Entropy Alloys |
Author(s) |
Daniel Foley, James Hart, Elaf A. Anber, Robert O. Ritchie, Andrew M. Minor, Mark D. Asta, Flynn Walsh , Michael S. Titus, Jean-Philippe Couzinie, Mitra L. Taheri |
On-Site Speaker (Planned) |
Mitra L. Taheri |
Abstract Scope |
This talk reviews recent work complex systems local structure evolution in high entropy alloys (HEAs). Despite their nominal chemical disorder, several studies have reported short range order (SRO) in HEAs – i.e. preferential bonding, local elemental enrichment and/or clustering – and such SRO may have broad implications for HEA performance. To tackle this problem, a suite of spatially resolved, electron imaging, diffraction, and spectroscopy techniques is leveraged to correlate local order with microstructural evolution and related dislocation phenomena. Microstructures of HEAs subjected to a variety of deformation regimes and quantified using diffraction-based techniques. These are compared to simulations of similar alloy families in order to determine the extent to which localized dislocation-based phenomena play a role in microstructural evolution, and how alloy chemistry plays a role in these determining factors. The techniques presented allow for the direct observation of the interplay between chemistry and microstructure, and thus, provides us with key tuning knobs for future HEA development. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume; Planned: Supplemental Proceedings volume |