| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Refractory Metals 2024
|
| Presentation Title |
Tailored Multi-phase Refractory Multiple-principal-Element Alloy Composites |
| Author(s) |
Gaoyuan Ouyang, Prashant Singh, Hailong Huang, Nicolas Argibay, Matthew J Kramer, Duane Johnson, Jun Cui |
| On-Site Speaker (Planned) |
Gaoyuan Ouyang |
| Abstract Scope |
Refractory multiple-principal-element alloys (RMPEAs) are promising candidates for harsh-service environments. Their mechanical properties have been shown to surpass those of nickel-based superalloys, such as specific strength and high-temperature strength-retention. However, like refractory metals, single-phase RMPEAs exhibit limited room-temperature (RT) ductility and strength. Multi-phase RMPEAs have been shown to exhibit significantly better combinations of strength and ductility, owing to their distinct grain boundary chemistry and grain sizes. We present results of investigations with mixtures of Mo-Nb-V-W and Mo-Nb-V-W-Ta powders, which were consolidated to full density and mechanically tested. A 50/50 wt.% mix showed a high RT peak compressive strength of 1969 MPa and 4.1% plastic strain, which is higher than that of the values found for the individual phases (i.e., 1877 MPa and 1.4% for alloy Mo-Nb-V-W and 1792 MPa and 3.6% for Mo-Nb-V-W-Ta). This engineered multi-phase alloy composites approach provides a more controllable pathway for improving and tailoring mechanical behavior. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Temperature Materials, Mechanical Properties, Composites |