| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Refractory Metals 2025
|
| Presentation Title |
New microscopic insights on the high temperature deformation mechanisms in refractory metals and alloys |
| Author(s) |
Mo-Rigen He, Sharon Park, Michael Patullo, Kevin Hemker |
| On-Site Speaker (Planned) |
Mo-Rigen He |
| Abstract Scope |
Refractory metals and alloys with novel processing, composition, and microstructure are of renewed interest for their potential applications as high temperature structural materials, and the rapid development of these materials poses an essential demand for elucidating the mechanical behaviors and exploring the deformation mechanisms at elevated temperatures. In this study, comprehensive transmission electron microscopy techniques are employed to characterize the nano- to atomic-scale deformation mechanisms in several refractory materials: a SLM-printed (nominally pure) Ta, a wrought and recrystallized WC-3009 (Nb-30Hf-9W) alloy, and a wrought and recrystallized HfNbTaTiZr equimolar alloy, each following uniaxial tension tests at temperatures up to 1000°C (for Ta) or 1600°C (for the two alloys) under vacuum. We focus on the emergence of unique deformation mechanisms at varied temperatures, such as the dynamic aging effect of impurities, the role of oxidation and phase stability, and the localized deformation at grain boundaries. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, High-Temperature Materials, Mechanical Properties |