| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
2025 Technical Division Student Poster Contest
|
| Presentation Title |
SPG-119: Microstructure Characterization of Rapid Joule Heated Refractory High Entropy Alloys |
| Author(s) |
Merbin John, Deepak Pillai, Yao Li, Feng Yan, Liang Qi, Yufeng Zheng |
| On-Site Speaker (Planned) |
Merbin John |
| Abstract Scope |
Rapid Joule heating is an emerging alloy manufacturing technique that enables precise control of homogeneous elemental composition and distribution by minimizing phase separation, producing cost-effective and highly densified components in minimal time. This study focuses on the microstructure in two refractory high entropy alloys (RHEAs), WMoTaNb and WMoTaNbRe, fabricated using rapid Joule heating, which hold promise for high-temperature applications. Advanced characterization techniques, including scanning electron microscopy (SEM), transmission electron microscopy (TEM), and nanoindentation were employed for the analysis. The grain structures and dendritic microstructures were revealed from SEM backscattered electron imaging, and the microscale compositional variations were examined using X-ray energy dispersive spectroscopy (XEDS). Notably, a core-shell structure was characterized in the SEM analysis, and the different phases involved were identified using diffraction contrast TEM analysis. Microhardness variations in the RHEAs were then evaluated using nanoindentation. The influence of Re addition on the microstructure in the RHEAs will be discussed. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
High-Entropy Alloys, High-Temperature Materials, Other |