About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Refractory Metals 2026 – A Memorial to Todd Leonhardt
|
| Presentation Title |
Microstructure, Deformation, and Nitrogen Effects in BCC+B2 V-Nb-Ru-Ti Alloys |
| Author(s) |
Bryan Crossman, Junxin Wang, Loic Perriere, Jean-Philippe Couzinié, Maryam Ghazisaeidi, Michael Mills |
| On-Site Speaker (Planned) |
Bryan Crossman |
| Abstract Scope |
Structural materials capable of higher operating temperatures are critical for advancing energy and transportation technologies. Multi-component refractory alloys with ductile BCC matrices strengthened by B2 precipitates offer exceptional thermal stability and mechanical strength. The V-Nb-Ru-Ti system, predicted by CALPHAD to form a VNb-rich BCC matrix and RuTi B2 precipitates, enables lattice misfit tuning via the V:Nb ratio, shifting misfit from slightly negative to slightly positive. Lattice misfit significantly influences high-temperature deformation mechanisms, making this system ideal for examining lattice misfit’s role in BCC+B2 microstructures. This study utilizes SEM and STEM to characterize the microstructure and deformation behavior, emphasizing dislocation-precipitate interactions. Nitrogen contamination during processing led to TiN precipitation, altering the microstructure and potentially influencing mechanical properties. This work aims to identify optimal lattice misfits for BCC+B2 microstructures to inform the design of refractory alloys with enhanced high-temperature performance. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
High-Temperature Materials, High-Entropy Alloys, Characterization |