| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Bcc-Superalloys
|
| Presentation Title |
Investigation of nano-scale phase separation in refractory high entropy alloys using complementary techniques |
| Author(s) |
Sudip Kumar Sarkar, Advika Chasetti, Nachiket Keskar, Abhishek Sharma, Vishal Soni, Tirthesh Ingale, Narendra Dahotre, Rajarshi Banerjee |
| On-Site Speaker (Planned) |
Sudip Kumar Sarkar |
| Abstract Scope |
Refractory high-entropy alloys (RHEAs) are drawing significant global research interest due to their outstanding mechanical properties at elevated temperatures. Among these, aluminum-containing RHEAs exhibit intriguing superalloy-like microstructures, believed to arise from phase separation between group IV (Ti/Zr/Hf) and group V/VI (Nb/Ta/V/Mo/W) elements into two body-centered cubic (BCC) structures, with one subsequently ordering into B2. However, a comprehensive and detailed study of phase separation in simpler systems, such as binaries and ternaries within these groups, is lacking. To fill this knowledge gap, this study aims to investigate the microstructure of selected ternary RHEAs using complementary techniques like atom probe tomography (APT) and transmission electron microscopy (TEM). This combined approach provides a thorough microstructural characterization of nanoscale phase separation and reliably quantifies the associated parameters, including spatial dimension, number density, volume fraction, and chemical composition. Finally, the nanoscale phase separation is correlated with the alloy's mechanical properties. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, Characterization, High-Temperature Materials |