About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Nanostructured Materials in Extreme Environments
|
Presentation Title |
The Role of Chemical Short-range Order on Defects Migration and Evolution in Multi-principal Element Alloys |
Author(s) |
Bin Xing, Xinyi Wang, Penghui Cao |
On-Site Speaker (Planned) |
Penghui Cao |
Abstract Scope |
Multi-principal element alloys with concentrated solid solutions are conceived to possess a rugged atomic and energy landscape in which defects motion necessarily proceeds to accommodate external thermomechanical stimuli. Fundamental questions remain as to how rough the energy landscape is and to what extent it can be influenced by the local ordering of the constituent elements. In this presentation, we will show that, in the presence of chemical short-range orders, vacancy diffusions considerably slow down, and the corresponding trajectories are localized. Concerning dislocation, the potential energy landscape governing dislocation motion reveals a hierarchical and multilevel structure with a collection of small basins nested in large metabasin. By introducing chemical short-range order, the energy landscape is smoothed but skewed to different degrees that balance the predominated mechanisms. |
Proceedings Inclusion? |
Planned: |
Keywords |
High-Entropy Alloys, Mechanical Properties, |