About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Advances in Refractory High Entropy Alloys and Ceramics
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| Presentation Title |
Understanding Compositional and Structural Non-uniformities in Refractory High Entropy Alloys |
| Author(s) |
Merbin John, Deepak Pillai, Lin Li, Feng Yan, Liang Qi, Yufeng Zheng |
| On-Site Speaker (Planned) |
Merbin John |
| Abstract Scope |
Refractory high entropy alloys (RHEA) exhibit high strength and improved oxidation resistance and have emerges as promising candidates for high-temperature applications. In this study, we investigated the microscale to nanoscale compositional and structural non-uniformities in a model WMoNbTa RHEA via the advanced characterization techniques. The grain structure and crystallographic texture were analyzed using scanning electron microscopy (SEM) and electron backscatter diffraction (EBSD). Nanostructures within the grain was evaluated using diffraction-contrast transmission electron microscopy (TEM) and z-contast aberration-corrected scanning transmission electron microscopy (STEM). Additionally, the compositional non-uniformities ranging from micro to nanoscales were examined using X-ray energy dispersive spectroscopy (XEDS) in both SEM and TEM, along with atom probe tomography (APT). The research provides new insights in understanding the multi-scale compositional and structural non-uniformities in RHEA. |