| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Refractory Metals 2023
|
| Presentation Title |
High-throughput Design, Synthesis, and Characterization of Refractory Multi-principal Element Alloys (MPEAs) for ULTIMATE |
| Author(s) |
Eli Norris, Cafer Melik Ensar Acemi, William Trehern, Brent Vela, Raymundo Arroyave, Ibrahim Karaman |
| On-Site Speaker (Planned) |
Eli Norris |
| 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. Eighty-eight refractory multi-principal element alloys (MPEAs) have been designed to exhibit a single BCC phase at elevated temperatures, target yield strength (>200 MPa) at 1300 ℃, and a narrow solidification range for additive manufacturability. The designed compositions are synthesized with high-throughput vacuum arc melting and characterized with electron microscopy (SEM/EDX), XRD, Vickers microhardness, and nanoindentation experiments. In the as-cast state, all samples had BCC phase with dendrites. Based on diffusion calculations centered around the compositional difference and dendrite arm spacing, homogenization heat treatments at 1800°C and 1925°C are performed. Compression experiments are then performed at high temperatures to compare with predicted high-temperature properties. Collected experimental data is fed back into the computational and experimental discovery loop to further improve models. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
High-Entropy Alloys, High-Temperature Materials, Mechanical Properties |