About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in the State-of-the-Art of High Temperature Alloys
|
| Presentation Title |
In-Situ TEM and X-Ray Diffraction Study of Phase Evolution in TaNiCo Refractory Metallic Glasses for Additive Manufacturing |
| Author(s) |
Jerry R. Howard, Nathan Madden, Forest Thompson, Grace Suenram, Dev Chidambaram, Krista Carlson |
| On-Site Speaker (Planned) |
Jerry R. Howard |
| Abstract Scope |
While metallic glasses have many desirable properties, they are typically not suitable for high-temperature applications due to recrystallization. Refractory-based MGs (RMGs) can improve upon this limitation by increasing the glass transition temperature (Tg) and crystallization temperature (Tx). However, crystallization of MGs is known to occur even below Tg and is highly dependent on composition and heating rate. Understanding the evolution of RMG structure is crucial for successful additive manufacturing (AM) and for application in extreme environments. In this study, TaNiCo RMG powders were produced using gas atomization. The structural evolution of this material upon heating was analyzed using in-situ transmission electron microscopy and X-ray diffraction. During nucleation and growth of μ-phase nanocrystals, a unique lamellar structure was observed. Further characterization was performed to understand the formation mechanism and structure of these crystallites. A deeper understanding of this structural evolution is key to the development of AM processes for TaNiCo RMGs. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Phase Transformations, High-Temperature Materials |