About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Refractory Metallic Materials
|
| Presentation Title |
Alloy Design and SPS Processing of Novel Niobium Alloys for Low Density, High Strength, Ductility and Fracture Toughness |
| Author(s) |
Zahra Gholami Shiri, Jordan Rafael Contreras, Chuan Zhang, K.S. Ravi Chandran |
| On-Site Speaker (Planned) |
K.S. Ravi Chandran |
| Abstract Scope |
Future high-temperature applications, e.g., next-generation aircraft turbine engines with operating temperatures beyond the limits of Ni-base superalloys, will require advanced refractory alloys with higher melting points and a good balance of strength and ductility. This study presents the design and processing spark plasma sintering (SPS) of two novel Nb-based alloys in the Nb–Hf–Ti–B system. The phase relations, sintering behavior and microstructural evolution during processing, and the resulting mechanical properties were investigated. Both alloys demonstrated high yield strengths (556–802 MPa), good ductility (2.3–5.8%), and good fracture toughness levels (26–31 MPa√m). Notably, significant tensile ductility and fracture toughness were achieved despite high oxygen levels, coming from elemental powders. The specific strengths of these alloys were benchmarked against known wrought Nb alloys, highlighting their competitiveness for density-sensitive, high-strength applications. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Temperature Materials, Mechanical Properties, |