About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Ultrafine-Grained and Heterostructured Materials (UFGH) XIV
|
| Presentation Title |
Microstructural Evolution of Nb-Alloys Processed via High-Pressure Torsion |
| Author(s) |
Miranda D. Bell, Kaitlyn Mullin, Lethicia Calderon, Tresa Pollock, Suveen Mathaudhu |
| On-Site Speaker (Planned) |
Miranda D. Bell |
| Abstract Scope |
The hydrostatic confinement conditions during severe plastic deformation (SPD) have been shown to enable microstructural refinement in a variety of materials, including refractory BCC alloys. Current SPD work focuses heavily on identifying the deformation mechanisms and microstructural features within the saturated microstructural regime, i.e. in the homogeneous grain-refined state at large strains. However, the intermediate microstructural evolution regimes leading up to the saturated microstructure (i.e. at intermediate strains) are considerably less studied. Here we report the use of SPD to process two niobium alloys, C103 and Nb-47Ti, to variable strains to study the microstructures and properties produced within the intermediate and saturated regimes. Local mechanical properties are correlated with microstructural features such as grain size, misorientation, dislocation cell size, and dislocation density. The reported findings will provide knowledge to enable the bulk wrought processing of BCC refractory alloys for use in extreme environments. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Mechanical Properties, Other |