About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
AI/Data Informatics: Computational Model Development, Verification, Validation, and Uncertainty Quantification
|
Presentation Title |
Uncertainty Quantification and Propagation in Modeling Hierarchy for Solidification of Metals and Alloys |
Author(s) |
Sepideh Kavousi, Mohsen Asle Zaeem |
On-Site Speaker (Planned) |
Sepideh Kavousi |
Abstract Scope |
In quantitative prediction of solidification nano and microstructures, uncertainties propagate through different length scales. We perform atomistic-informed phase-field modeling of solidification of metals and alloys to investigate the uncertainty quantification and propagation in the modeling hierarchy. We use both parabolic and hyperbolic phase-field models to investigate slow, moderate, and rapid solidification ranges. First, we quantify the effect of various aleatoric (kinetic energy distribution) and epistemic (system size, defective structure, interatomic potential) uncertainty sources on different high temperature thermophysical properties, such as the melting point, interface energy, diffuse interface velocity, kinetic coefficient. Then, to quantify the uncertainty propagation, we select multiple samples from the input space of each property and perform phase-field simulations under different solidification conditions by changing the temperature gradient and solidification velocity. The results provide a comprehensive understanding of uncertainty propagation mechanisms through different length scales in prediction of nano and microstructures of slow and rapid solidification. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Machine Learning, Solidification |