About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
|
Symposium
|
Advanced Characterization Techniques for Quantifying and Modeling Deformation
|
Presentation Title |
Multi-Scale Characterization of 3D Printable CrCoNi-Based ODS-MPEAs by Methods of Advanced Stereo-STEM Cross-Correlated with EDS – Resourcing Experimental Data to Act as Potential Input into the Quantitative Models |
Author(s) |
Milan Heczko, Timothy M Smith, Christopher A Kantzos, Antonín Dlouhý, Michael J Mills |
On-Site Speaker (Planned) |
Milan Heczko |
Abstract Scope |
Our recent work (Nature, 2023) has demonstrated a new design strategy applied to 3D printable alloys for high-temperature applications. It combines multi-principal-element-alloy (MPEA) and oxide-dispersion-strengthening (ODS) concepts. Impressive macroscopic behavior results from a carefully optimized hierarchical microstructure where the homogeneous dispersion of oxide particles interacts with the complex network of various lattice defects in the solid solution matrix. In order to identify critical mechanisms determining alloy performance for further optimization of their design, a new and efficient multi-scale characterization approach based on stereo-scanning transmission electron microscopy (STEM) diffraction contrast imaging cross-correlated with EDS is introduced. Stereo-STEM provides a direct 3D determination of the microstructure and enables precise measurement of local foil thickness, allowing quantitative assessment of the oxide dispersion. Combined with local defect density measurements, this approach provides detailed multi-layered and quantitative information essential for process optimization and to develop relationships between the microstructure and the alloys macroscopic performance. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Characterization, High-Temperature Materials |