| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Refractory Metallic Materials
|
| Presentation Title |
Uncovering the Ultra-High Temperature Deformation Mechanisms of Novel Refractory Alloys |
| Author(s) |
Sharon Park, Mo-Rigen He, Syed I.A. Jalali, Michael Patullo, Noah Philips, Abdelmoez Hussein, Moataz Attallah, Kevin Hemker |
| On-Site Speaker (Planned) |
Sharon Park |
| Abstract Scope |
Refractory metals and alloys are renowned for their exceptional high temperature properties and are preferred in applications that require high strength and resistance to extreme environments. Moreover, the rapid and ongoing development of these alloys necessitates the elucidation of their ultra-high temperature (UHT) mechanical performance. In this study, we investigate the UHT deformation mechanisms of refractory alloys such as ATI WC3009, SLM W-10Ta, and SLM W-Y2O3. A novel UHT vacuum (10-7 torr) testing system was employed to conduct mechanical tests, including uniaxial tension, and strain-rate change, of these alloys at elevated temperatures ranging from 1000 to 1800ºC. Postmortem electron microscopy was employed to identify the atomic level mechanisms that underpin the mechanical performance of these alloys at these temperatures. A particular focus was placed on how UHT microstructures and deformation mechanisms deviate from traditional mechanisms, e.g., grain boundary sliding, exhaustive recovery mechanisms, and the role of oxidation and equi-cohesive temperature. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, High-Temperature Materials, Additive Manufacturing |