| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Multi-Principal Element Alloys II
|
| Presentation Title |
J-21: Design of MoWTaTiZr Refractory Multi-principal Element Alloys for High-temperature Applications |
| Author(s) |
Gaoyuan Ouyang, Prashant Singh, Jun Cui, Matthew J Kramer, Oleg Senkov, Daniel Miracle, Duane Johnson |
| On-Site Speaker (Planned) |
Gaoyuan Ouyang |
| Abstract Scope |
The high specific strength at elevated temperatures exhibited by Refractory Multi-Principal Element Alloys (RMPEA) makes them suitable for a number of aerospace and engineering applications. However, many reported RMPEAs that retain their high strength above 1000°C are brittle, and their creep properties are mostly unknown. In the quintenary system Mo-W-Ta-Ti-Zr, we have identified several new molybdenum-rich compositions that experimentally show three times more ductility than the equiatomic NbTaMoW RMPEA at room temperature, two times stronger than TZM at 1300 °C, and ten times more creep resistant than TZM and nickel-based superalloy at 1000 °C. We will discuss our computational approach to identify the appropriate phase space, rapid bulk-alloy synthesis and characterization, down-selection criteria for selecting the alloys, and the application of small-punch test to evaluate tensile and creep properties above 1000°C for the newly developed alloys. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Temperature Materials, Characterization, Mechanical Properties |