| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
High Entropy Alloys IX: Alloy Development and Properties
|
| Presentation Title |
Nanostructured Oxide-dispersion-strengthened High-entropy Alloys |
| Author(s) |
Xiang Zhang, Fei Wang, Xueliang Yan, Xing-Zhong Li, Khalid Hattar, Bai Cui |
| On-Site Speaker (Planned) |
Bai Cui |
| Abstract Scope |
A nanostructured oxide-dispersion-strengthened (ODS) CoCrFeMnNi high-entropy alloy (HEA) has been synthesized by mechanical alloying process. The thermal stability, including the grain size and phase composition of the HEA matrix, as well as the particle size of oxide dispersions, were carefully investigated by electron microscopy characterizations after annealing at 900 oC. The limited grain growth may be attributed to Zener pinning of intergranular yttria dispersions that impede the grain boundary mobility. The hardness of nanostructured ODS CoCrFeMnNi HEA is 2.7 times higher than CoCrFeMnNi HEA without yttria dispersions. 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: |