About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Structure, Morphology, Coarsening and Strengthening Behavior of MX Nanoprecipitates in FCC Solid Solution Based Alloys |
| Author(s) |
Milan Heczko, Andreas Bezold, Roman Gröger, Jan Vollhüter, Timothy M Smith, Yunzhi Wang, Michael J Mills |
| On-Site Speaker (Planned) |
Milan Heczko |
| Abstract Scope |
The precipitates of MX-type are considered as the most important strengthening phase in several FCC solid solution-based alloys designed for high-temperature applications. Despite extensive effort, many questions related to the structure, nucleation, coarsening behavior, as well as the mechanisms of interaction with crystal lattice defects, remain unanswered. This work investigates role of MX nanoprecipitates in two alloy systems: (1) Sanicro 25, a newly designed Fe-Ni-Cr based alloy with superior high temperature properties (e.g. the highest reported creep strength at 700°C among all relevant commercial alternatives), and (2) NASA GRX-810, 3D printed CrCoNi-based alloy which has 1000-fold better creep performance at 1093°C than the traditional Ni-based superalloys. Various thermo-mechanical experiments combined with state-of-the art electron microscopy, atom probe tomography and modeling tools were used to study structure, morphology, interface character, coarsening and strengthening behavior of MX nanoprecipitates. The results are discussed in relation to the design of new fine-precipitation strengthened materials. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Temperature Materials, Characterization, Other |