| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
The Role of Deformation on Local Ordering in FCC Alloys |
| Author(s) |
William S. Cunningham, Hannah Howard, Pulkit Garg, Edward W. Li, Divya Singh, Arda Genc, Timothy J. Rupert, Daniel S. Gianola |
| On-Site Speaker (Planned) |
William S. Cunningham |
| Abstract Scope |
Local stress states induced by dislocations can drive the formation of stable nanoscale phases, as recently demonstrated through molecular dynamics simulations on binary FCC alloys. However, the exact role deformation plays in local ordering is not fully understood. Utilizing bulk FCC Ni-Al and Al-Cu alloys as testbed systems, we investigate the tendency for local ordering through systematic heat-treatments followed by processing to induce varying deformation states. Changes in the deformation state across processing conditions are explored through high-throughput nanoindentation, with characterization of the nanoscale features of interest performed through advanced high resolution scanning transmission electron microscopy. Our results demonstrate that the highest deformation states promote local ordering and drive subsequent formation of stable nanoscale phases during annealing. Such behaviors have significant implications for the microstructural properties and significantly, the landscape through which dislocations navigate during plastic deformation. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Phase Transformations, Characterization, Copper / Nickel / Cobalt |