| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Multi-Principal Element Alloys II
|
| Presentation Title |
Tailoring Microstructure of Refractory High Entropy Superalloys through Semi-quantitative Miscibility Gap |
| Author(s) |
Sangjun Kim, Jiyoung Kim, Jae Kwon Kim, Kook Noh Yoon, Hyun Seok Oh, Eun Soo Park |
| On-Site Speaker (Planned) |
Eun Soo Park |
| Abstract Scope |
For a few decades, there have been extensive investments to develop alternative materials of Ni-based superalloys for high-temperature applications. Recently, a new class of alloys called refractory high-entropy superalloys (RHSAs) has attracted significant attention due to their superior mechanical properties. However, there are many issues that need to be resolved, such as optimal phase selection between ordered and disordered BCC phases, precipitation control of unwanted compounds, optimization of mechanical properties, etc. In the present study, we propose how to tailor the microstructure of RHSAs through a bulk combinatorial approach in the TiZrNbTaAl quinary system. By collecting all the results on microstructure and phase transformation, a semi-quantitative miscibility gap was successfully constructed for the (TiZr)-(NbTa)-Al pseudo-ternary system, which can provide an effective guideline for tailoring microstructure of RHSAs like other conventional superalloys. Our study paves the way for the development of promising RHSAs with customized microstructure for ultra-high temperature structural applications. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, Phase Transformations, Characterization |