About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
Computational Thermodynamics and Kinetics
|
Presentation Title |
Uncertainty Quantification of Classical Theories of Dendritic Growth Kinetics Applied to Nickel-based Alloys |
Author(s) |
Brodan Richter, Joshua D. Pribe, Richard Otis, Edward H. Glaessgen |
On-Site Speaker (Planned) |
Brodan Richter |
Abstract Scope |
The solidification velocity in a model nickel-alloy single crystal during laser spot melting was recently characterized using synchrotron X-ray imaging. The measured solidification velocity was found to exceed the absolute stability threshold predicted by the Kurz-Giovanola-Trivedi (KGT) model. The discrepancies between the model and experiments motivate the further assessment of accurate material properties. This work quantifies the impact material property uncertainty has on model predictions of the absolute stability threshold velocities. Properties from the literature are reviewed and compared to those calculated using computational thermodynamics to provide uncertainty estimates on input properties to the KGT model. Global sensitivity analysis is used to quantify the influence of each uncertain input property on the predicted threshold velocity. This work supports the understanding of the nickel-alloy solidification during powder bed fusion additive manufacturing and identifies the solidification material properties that are the most important to assess from first-principles computations and experiments. |
Proceedings Inclusion? |
Planned: |
Keywords |
Solidification, Computational Materials Science & Engineering, Copper / Nickel / Cobalt |