About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
2026 Technical Division Student Poster Contest
|
| Presentation Title |
SPG-51: Nitrogen Site Occupancy in an NbTaTiZr Multi-Principal Element Alloy Subjected to Laser Nitriding |
| Author(s) |
Anna K. Rawlings, Andrew Birnbaum, John Steuben, Keith Knipling, Athanasios Iliopoulos, Mitra Taheri |
| On-Site Speaker (Planned) |
Anna K. Rawlings |
| Abstract Scope |
A refractory multi-principal element alloy from the NbTaTiZr system was investigated for microstructural and mechanical response to laser nitriding. Alloys from this system show promising room- and high-temperature structural properties, and laser nitriding has the potential to significantly increase the wear performance. Specifically, in this work, the phase formation and spatially-resolved nanoindentation hardness were analyzed throughout the cross sections of the fusion zones. Ductility is often sacrificed at the expense of the hardening, so nitrogen must be systematically introduced to avoid deleterious, brittle phases. A simulation of the thermo-chemical process was generated to model the physical processes involving laser heating and nitrogen influx. This model can be utilized to optimize the laser processing conditions for controlled phase composition through parameters such as the process gas nitrogen concentration as well as laser power and velocity. The target composition was informed by rapid solidification thermodynamic calculations and experimental characterization. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
Surface Modification and Coatings, High-Temperature Materials, |