| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Refractory Metals 2025
|
| Presentation Title |
Understanding the microstructural evolution and mechanical property in as-cast and annealed Refractory High Entropy Alloys |
| Author(s) |
Merbin John, Deepak V Pillai, Sydney Fields, Lin Li, Feng Yan, Liang Qi, Yufeng Zheng |
| On-Site Speaker (Planned) |
Merbin John |
| Abstract Scope |
Refractory high entropy alloys (RHEA) composed of refractory elements with body centered crystal structure are promising for high-temperature applications and could potentially replace nickel-based superalloys. Specifically, this study explores the microstructural evolution and mechanical properties in two different as-cast RHEA’s such as WMoTaNb, W10Mo25Ta25Nb40 and their annealed counterparts. The microstructure evolutions were studied using the advanced characterization techniques including scanning electron microscopy (SEM), transmission electron microscopy (TEM). The grain structure in the RHEA was identified using SEM electron backscatter diffraction (EBSD), TEM diffraction and imaging. The microscale to nanoscale compositional variations is characterized using X-ray energy dispersive spectroscopy (XEDS) in the SEM and TEM as well as atom probe tomography (APT). Furthermore, hardness in these RHEA’s were studied by nano-indentation technique. The influence of the microstructure on the hardness in these RHEA’s will be discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, Characterization, |