About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Refractory Metals 2026 – A Memorial to Todd Leonhardt
|
| Presentation Title |
Design and Fabrication of Refractory Multi-Principal Element alloys using Spark Plasma Sintering |
| Author(s) |
Eli Norris, Cafer Acemi, Brent Vela, Ibrahim Karaman, Raymundo Arroyave |
| 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, and low thermal expansion. In this study, 213 refractory multi-principal element alloys were designed under two sets of constraints to achieve a single BCC phase and targeted yield strengths (>200 MPa at 1300°C or >50 MPa at 2000°C). Alloys were synthesized using vacuum arc melting, homogenized above 1800°C, and characterized for microstructure, thermal, and mechanical properties. Promising compositions were scaled-up, and pre-alloyed powders were gas-atomized and consolidated using Spark Plasma Sintering. Sintered specimens were characterized using electron microscopy, Vickers microhardness testing, and compression testing. The sintering process was optimized through variations in temperature, pressure, hold time, and modifications to powder morphology via high-energy ball milling to achieve densities greater than 98%. SPS fabricated samples demonstrated strength levels higher than 2 GPa with ductility levels exceeding 20% at room temperature. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
High-Temperature Materials, High-Entropy Alloys, Powder Materials |