About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
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Advances in Multi-Principal Element Alloys III: Mechanical Behavior
|
Presentation Title |
Development of Hierarchical ODS High Entropy Alloys Guided by ICME |
Author(s) |
William Trehern, Yi Wang, Saro San, Prashant Singh, Fred Lia, Jackie Garofano, Dongsheng Li, Michael C. Gao |
On-Site Speaker (Planned) |
Michael C. Gao |
Abstract Scope |
The project aims to develop and manufacture cost-effective, oxide dispersion-strengthened, FCC-based high entropy alloys that are superior to Ni-based superalloys (e.g., IN740) for repair or replacement service in extreme environments. The FCC solid solution matrix is strengthened by coherently ordered L12 precipitates and toughened by transformation induced plasticity and/or twinning induced plasticity effects. High throughput, multiscale computer modeling is performed to accelerate alloy discovery by assessing the intrinsic alloy properties including phase stability, coefficient of thermal expansion, stacking-fault energy, elastic properties, and yield strength. Based on modeling and experimental results, physics-informed machine learning is performed to predict temperature-dependent yield stress and stacking fault energy of FCC-based heat resistant alloys. The predicted alloy with superior properties is synthesized by direct energy deposition additive manufacturing, and microstructure characterization and mechanical behavior tests are performed to validate model prediction. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, High-Temperature Materials, ICME |