About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Computational Thermodynamics and Kinetics
|
Presentation Title |
Multi-scale Crystal Plasticity Model for Superalloys |
Author(s) |
Shahriyar Keshavarz, Carelyn Campbell, Andrew Reid |
On-Site Speaker (Planned) |
Shahriyar Keshavarz |
Abstract Scope |
This study focuses on modeling creep in superalloys using multi-scale approaches to simulate and predict mechanical responses in crystal plasticity finite element platforms. The model has two important features of morphology including the average size, the volume fraction, and the shape of the precipitates, and composition. The multi-scale framework bridges two sub-grain and homogenized grain scales. For the sub-grain scale, a size-dependent, dislocation density-based constitutive model in the crystal plasticity finite element framework with the explicit depiction of the gamma-gamma prime morphology is used as a building block for the next homogenized scale. For the homogenized scale, a composition-dependent activation energy-based crystal plasticity model is developed which has implicit effects of the morphology. The homogenized model can significantly expedite crystal plasticity FE simulations due to the parameterized representation while retaining accuracy. The glide and climb dislocation mechanisms are proposed in order to capture the creep response of superalloys. |
Proceedings Inclusion? |
Planned: |