| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Refractory Metals 2023
|
| Presentation Title |
Rhenium Effect on the Microstructure and Mechanical Properties of NbTiZr and TaTiZr Equiatomic Alloys |
| Author(s) |
Oleg N. Senkov, Stephane Gorsse, Robert Wheeler, Eric Payton, Daniel B. Miracle |
| On-Site Speaker (Planned) |
Oleg N. Senkov |
| Abstract Scope |
Microstructure, phase composition and mechanical properties of NbTiZr, TaTiZr, Re0.3NbTiZr and Re0.3TaTiZr are reported. NbTiZr had a single-phase BCC crystal structure while TaTiZr had a Ti- and Zr-rich BCC matrix phase and Ta-rich nano-meter-sized BCC precipitates at volume fractions of 0.49 and 0.51, respectively. Re0.3NbTiZr consisted of a BCC matrix phase and 14% (by volume) Re-rich precipitates with a FCC crystal structure. The microstructure of Re0.3TaTiZr consisted of a Zr-rich BCC matrix phase and coarse, Re and Ta rich, BCC particles. NbTiZr and TaTiZr had room temperature (RT) yield stress of 920 MPa and 1670 MPa, respectively. 10 at.% Re additions increased the RT yield stress to 1220 MPa in Re0.3NbTiZr and 1715 MPa in Re0.3TaTiZr. Re also considerably improved RT ductility of TaTiZr, from about 2% to 9% total compressive strain. The positive strengthening effect from the Re additions was retained at high (800-1200°C) temperatures. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
High-Temperature Materials, Phase Transformations, Mechanical Properties |