About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Refractory Metals 2026 – A Memorial to Todd Leonhardt
|
| Presentation Title |
A Brief Review of Plastic Flow Behaviors in Unalloyed Mo and Nb at High Temperatures |
| Author(s) |
Eric M. Taleff |
| On-Site Speaker (Planned) |
Eric M. Taleff |
| Abstract Scope |
To better understand how alloying might improve the high-temperature strength of refractory metals, it is useful to first understand the behaviors of the unalloyed metals. To this end, we review the plastic flow behaviors of unalloyed Mo and Nb at high temperatures, with perhaps a mention of Ta. A mechanistic understanding of high-temperature plastic flow is typically first approached through the concept of steady-state deformation, either by way of theory or phenomenology. A common obstacle to the implementation of this approach is unsteady microstructure evolution, with dynamic grain growth presenting the most dramatic examples. These considerations are applied to interpret both how five-power creep controls plastic flow at high temperatures and how it influences microstructure evolution through dynamic grain growth. This mechanistic understanding suggests how impurity content, such as interstitial elements in Nb, and alloying additions might increase high-temperature strength. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
High-Temperature Materials, Mechanical Properties, |