About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Fundamental Science of Microstructural Evolution and Phase Transformations: An MPMD/FMD/SMD Symposium in Honor of Peter Voorhees
|
| Presentation Title |
Solidification Path of a Nickel-Based Superalloy Produced by Laser Powder Bed Fusion and its Role on Hot Cracks |
| Author(s) |
Paul Martin, Gildas Guillemot, Yancheng Zhang, Michel Bellet, Charles-Andre Gandin |
| On-Site Speaker (Planned) |
Charles-Andre Gandin |
| Abstract Scope |
The solidification path of Inconel 738 in Laser Powder Bed Fusion (LPBF) is modeled by coupling a non-equilibrium phase diagram, a dendrite tip kinetic model and a microsegregation model, all fully coupled with CALPHAD databases. Predictions are compared with measurements deduced from microprobe analyses on samples taken at know positions in single beads processed at several laser velocities. The local velocity of the solidification front at these positions is deduced from a model considering heat and mass transfers in the melt pool. Integration of the velocity-dependent solidification paths in a thermomechanical analysis is finally presented as a tool for assessing the risk of hot crack formation. To this end, a hot cracking sensitivity criterion is implemented based on cumulative plastic strain at the last stage of solidification. Process and material parameters are examined. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Solidification, Additive Manufacturing, Computational Materials Science & Engineering |