| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Refractory Metals 2025
|
| Presentation Title |
High-throughput design, synthesis, and characterization of refractory multi-principal element alloys (MPEAs) |
| Author(s) |
Cafer Melik Ensar Acemi, Eli Norris, Brent Vela, Raymundo Arroyave, Ibrahim Karaman |
| On-Site Speaker (Planned) |
Cafer Melik Ensar Acemi |
| Abstract Scope |
Refractory alloys are promising for high-temperature applications because of their high strength at elevated temperatures, high thermal conductivity, low thermal expansion coefficient, and operability under oxidizing conditions. One hundred eighty-three refractory multi-principal element alloys (MPEAs) are designed under two sets of constraints to have single BCC phase at elevated temperatures, target yield strength (>200 MPa at 1300°C or >50 MPa at 2000°C), and narrow solidification range for additive manufacturability. Designed compositions are synthesized with high-throughput vacuum arc melting and characterized via electron microscopy (SEM/EDX), XRD, Vickers microhardness, nanoindentation, compression, and tension. In the as-cast state, the majority of samples had BCC phase with dendrites. Homogenization heat treatments are performed at 1800°C and 2000°C to eliminate dendritic structure after diffusion calculations based on the compositional differences measured in the dendrites. Compression/tension experiments are then performed at high temperatures to compare with the predicted high-temperature properties. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, High-Entropy Alloys, High-Temperature Materials |