| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Deformation-induced Manipulation of Defect Structures and Hierarchical Microstructures
|
| Presentation Title |
Nanostructural Hierarchy in Metallic Materials for Extended High Temperature Stability |
| Author(s) |
Subhashish Meher, Sourabh Kadambi, Thomas M Lillo |
| On-Site Speaker (Planned) |
Subhashish Meher |
| Abstract Scope |
The structural hierarchy exhibited by materials on more than one length scale can play a major part in determining bulk material properties. Understanding the hierarchical structure can lead to new materials with physical properties tailored for specific applications. A combined experimental and phase-field modeling approach has been used to explore such hierarchical structures at nanoscale for enhanced coarsening resistance in a gamma-gamma prime Ni-base superalloy and a BCC-B2 based high entropy alloy (HEA). Experiments and phase-field modeling highlight the importance of embedded phases (gamma and BCC respectively) to promote stability of (gamma-prime and B2 respectively) and to delay coarsening of the encompassing precipitates. Phase field modeling based on experimental results reveals the reasoning for enhanced precipitate coalescence in these alloys. This research on hierarchical structures establishes a new paradigm for alloy design for specific needs of emerging nuclear, fossil and solar energy applications. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, High-Temperature Materials, Characterization |