About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Additive Manufacturing of Metals: Applications of Solidification Fundamentals
|
Presentation Title |
A-24: Microsegregation Model Dedicated to Rapid Solidification
– Application to Multicomponent Alloys of Industrial Interest. |
Author(s) |
Paul Martin, François Pichot, Nicolas Leriche, Gildas Guillemot, Charles-André Gandin |
On-Site Speaker (Planned) |
Charles-André Gandin |
Abstract Scope |
The soundness of parts produced by Laser Powder Bed Fusion (L-PBF) depends on the possibility to limit the occurrence of defects. Among them, hot cracking represent a key issue for industries. These cracks are due to the persistence of a liquid film at the end of the solidification stage together with large stresses. A microsegregation model that predicts the solidification path for materials produced by LPBF is thus required, not only to account for the initial undercooling of the microstructure but also to follow the composition of the interdendritic chemical species during LPBF.
Several phenomena are considered: i- solute redistribution based on unsteady diffusion, ii- dendrite tip growth model and iii- kinetic phase diagram. Cross-diffusion of solute species in the liquid is also taken into account, as well as coupling with CALPHAD. Results are compared to experimental data in the Ag-Cu system before applications dedicated to nickel-base superalloys. |
Proceedings Inclusion? |
Planned: |
Keywords |
Modeling and Simulation, Solidification, |