| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Multi-Principal Element Alloys IV: Mechanical Behavior
|
| Presentation Title |
Revealing the Deformation Mechanism Competition in Multi-Principal Element Alloys by Nanobending Experiments |
| Author(s) |
Novin Rasouli, Matthew Daly |
| On-Site Speaker (Planned) |
Novin Rasouli |
| Abstract Scope |
This study investigates the intrinsic competition between deformation twinning and dislocation slip mechanisms through nanobending tests on single crystal multi-principal element alloys. The mechanics of this nanobending method inherently diminish the influence of microstructure heterogeneities on defect activation and therefore enable a direct study of mechanism competition as it emerges from the fundamental defect metallurgy. For these experiments, we have chosen the equimolar CrCoNi medium-entropy alloy as our benchmark system, due to its low stacking fault energy and solid solution microstructure, and its attractive set of mechanical properties that are derived from slip and twinning mechanisms. Furthermore, our experimental approach couples Electron Backscatter Diffraction analysis with nanobending tests. This combination enables fabrication of nanobeam samples with a specified texture in order to balance Schmid effects in the activation of the Shockley partial dislocation sources required to propagate slip and twinning. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, High-Entropy Alloys, Other |