| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Lattice Boltzmann Phase-field Modelling of Solidification Process for the Ni-Nb Binary-alloy |
| Author(s) |
Huang Xueqin |
| On-Site Speaker (Planned) |
Huang Xueqin |
| Abstract Scope |
Understanding of the microstructure evolution during solidification is very important to the understanding of Additive Manufacturing. Solidification is not only affected by thermal histories but fluid flow effects must be considered as well. In this work, the lattice Boltzmann model is coupled with a finite interface dissipation phase-field model to consider the influence of the fluid flow on solidification during AM of a Ni-Nb binary alloy. The buoyancy forces, resulting from the concentration and temperature gradients, induce particle velocity redistribution within the liquid phase. This affects the concentration of Nb at the interface, which lead to the microstructure change of the material. The lattice Boltzmann model is built to fulfill the mass and momentum conservation for binary-phase and the binary-phase Navier-Stokes equation can be derived from the LBM. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |