About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
CFD Modeling and Simulation in Materials Processing 2027
|
| Presentation Title |
Multiphysics Modeling of Solute Transport and Solidification in Alloy 718 Vacuum Arc Remelting |
| Author(s) |
Zilong Zhang, Elaheh Dorari, Ramesh S Minisandram, Shankarjee Krishnamoorthi, Lang Yuan |
| On-Site Speaker (Planned) |
Zilong Zhang |
| Abstract Scope |
Numerical simulation is essential for understanding macrosegregation behavior and supporting process development for quality control in vacuum arc remelting (VAR). In this study, a multiphysics model was developed in ANSYS Fluent for Alloy 718 VAR by coupling electromagnetic fields, melt flow, heat transfer, solidification, and macroscale solute transport. Two industrial electrode sizes, 6’’ and 8’’, were investigated experimentally and numerically to examine the effects of ingot scale on melt pool behavior, solidification history, and solute redistribution. The model captured the evolution of the melt pool and predicted nonuniform solute redistribution during solidification, particularly in regions with steep gradients in velocity and liquid fraction near the mushy zone. Alloy composition measurements using X-ray fluorescence were performed at selected locations to assess the predicted macrosegregation trends. In addition, secondary dendrite arm spacing measurements provided a microstructural basis for evaluating the solidification history and interpreting the differences between the two electrode configurations. |
| Proceedings Inclusion? |
Planned: |