| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Refractory Metals 2023
|
| Presentation Title |
High-throughput Design, Synthesis, and Characterization of W-based Refractory Multi-principal Element Alloys (MPEAs) |
| Author(s) |
Cafer Melik Ensar Acemi, William Trehern, Eli Norris, Brent Vela, Peter Morcos, Raymundo Arroyave, Alaa Elwany, Ibrahim Karaman |
| On-Site Speaker (Planned) |
Cafer Melik Ensar Acemi |
| Abstract Scope |
Refractory alloys, including tungsten alloys, are promising for high-temperature applications due to their high strength at elevated temperatures, high thermal conductivity, low thermal expansion coefficient, and resistance to creep. Forty-three refractory multi-principal element alloys with tungsten contents of more than 30 at.% are designed to have single BCC phase at high temperatures, target yield strength (>50 MPa) at 2000°C, and narrow solidification range for 3D printability. The designed compositions are synthesized via high throughput vacuum arc melting. The samples are then characterized using electron microscopy (SEM/EDX), XRD, Vickers microhardness, and nanoindentation experiments. In as-cast state, majority of samples had BCC phase with dendrites. Homogenization heat treatments are performed at 2000°C to eliminate dendritic structure after diffusion calculations based on the compositional differences measured in the dendrites. Compression experiments are conducted at high temperatures to compare the initial model predictions and the experimental strength results, which will be presented in detail. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
High-Entropy Alloys, High-Temperature Materials, Mechanical Properties |