| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Analysis of the L12 to hP24 Phase Transformation behavior of a Co3Ti precipitate during High Temperature Tensile deformation of a Co-based superalloy system |
| Author(s) |
Hyun Gi Min, William Streit Cunningham, Kooknoh Yoon, Minseok Kim, Daniel S. Gianola, Eun Soo Park |
| On-Site Speaker (Planned) |
Hyun Gi Min |
| Abstract Scope |
The importance of high-temperature materials is increasingly critical, driven by the demands of advanced aerospace and energy applications. Cobalt-based superalloys, especially the W-free Co-Ti system, offer promising potential due to their excellent specific strength and oxidation resistance. This study focuses on the unique high-temperature phase transformation behavior of a Co3Ti precipitate, which transforms from an L12 to a hexagonal hP24 phase without altering its (111) plane’s configuration. Detailed analysis with APT and TEM, combined with DFT simulations, was conducted to understand diffusion involvement, specific stress and temperature conditions, and the role of minor elements during this transformation. The insights gained from this study provide a deeper understanding of phase transformation behavior in Co-based superalloys at elevated temperatures. This is crucial for advancing the development of newly engineered alloy systems, enhancing high-temperature performance, and expanding the application space for these advanced materials. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Temperature Materials, Phase Transformations, Copper / Nickel / Cobalt |