About this Abstract |
Meeting |
2026 TMS Annual Meeting & Exhibition
|
Symposium
|
Thermodynamics and Kinetics of Alloys IV
|
Presentation Title |
The Impact of Phase Stability on Room Temperature Ductility in Refractory High Entropy Alloys
|
Author(s) |
Jacob Pustelnik, Bryan Nguyen, Ayeman Nahin, Tamanna Zakia, Michael Lau, Mingwei Zhang |
On-Site Speaker (Planned) |
Jacob Pustelnik |
Abstract Scope |
Refractory high entropy alloys (RHEAs) are promising for high-temperature structural applications due to their high melting points and strength at elevated temperatures. However, these materials are known for their poor tensile ductility at room temperature. Our study found that the phase instability is the leading culprit for their tensile brittleness, particularly in nominally single-phase BCC alloys that are predicted to be intrinsically ductile. This study further investigates the factors both kinetically and thermodynamically controlling phase stability in single-phase BCC alloys and seeks to mitigate these effects of secondary phase formation using CALPHAD calculations. Synergistic high-throughput experimental validation will be carried out to infer room temperature tensile ductility. By bridging computational screening with CALPHAD calculations and experimental validation, this research will enable compositions that achieve both a balance of strength and ductility in a single-phases solid solution, advancing the design of RHEAs applied under extreme environments. |
Proceedings Inclusion? |
Planned: |
Keywords |
High-Entropy Alloys, High-Temperature Materials, |