| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials Aging and Compatibility: Experimental and Computational Approaches to Enable Lifetime Predictions
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| Presentation Title |
Phase-field-informed Crystal-plasticity Modeling of 3D γ’ Rafting in Ni-based Single-crystal Superalloys |
| Author(s) |
Jean-Briac le Graverend, Aidan J. O'Donnell |
| On-Site Speaker (Planned) |
Jean-Briac le Graverend |
| Abstract Scope |
γ’ rafting is of prime importance in predicting Ni-based single-crystal superalloys' mechanical performance during thermo-mechanical loading. Suppose a scalar internal variable may be sufficient for uniaxial loading, it is clearly not the case anymore when the loading becomes multiaxial, which is the loading applied to turbine blades during in-service applications. A bottleneck to improve rafting prediction is the capability to track rafting evolution in situ and in 3D. The current 3D techniques are destructive and the in situ ones only 2D. The phase-field method is perfectly positioned to track continuously and in 3D the rafting process. This is why phase-field simulations were carried out at various stress levels and crystallographic orientations. The obtained simulations were then analyzed to extract the γ channel width with time. The results were employed to calibrate a developed vectorial formulation of γ’ rafting in a crystal-plasticity model that was tested on notched specimens. |
| Proceedings Inclusion? |
Planned: |