| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Multi-Principal Elements Alloys X: Alloy Development and Properties
|
| Presentation Title |
Nanostructured Oxide-dispersion-strengthened CoCrFeMnNi High Entropy Alloys: Processing, Microstructures, and Thermal Stability |
| Author(s) |
Xiang Zhang, Fei Wang, Xueliang Yan, Xing-Zhong Li, Khalid Hattar, Bai Cui |
| On-Site Speaker (Planned) |
Fei Wang |
| Abstract Scope |
A nanostructured oxide-dispersion-strengthened (ODS) CoCrFeMnNi high-entropy alloy (HEA) has been synthesized by a powder metallurgy process. The thermal stability, including the grain size and crystal structure of the HEA matrix and oxide dispersions, was carefully investigated by X-ray diffraction and electron microscopy characterizations after annealing at 900 ºC. The limited grain growth may be attributed to Zener pinning of yttria dispersions that impede the grain boundary mobility and diffusivity. The high hardness was caused by both the fine grain size and yttria dispersions, which was also retained after annealing at 900 ºC. This research implies that the combination of ODS and HEA concepts may provide a new design strategy for the development of thermally stable nanostructured alloys for extreme environments. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, |