Table 2 Material characteristics and simulation parameters for Al-3.0wt%Cu alloy
Parameters | Symbol | Unit | Value |
|---|---|---|---|
Equilibrium partition coefficient | ke | – | 0.17 |
Equilibrium liquidus slope | \({m}_{1}^{0}\) | K wt%−1 | − 5.3 |
Initial concentration | \({c}_{1}^{0}\) | wt% | 3.0 |
Gibbs-Thomson coefficient | Γ | 10−7Km | 2.4 |
Liquid diffusive coefficient | D1 | 10−9m2 s−1 | 3.0 |
Solid diffusive coefficient | Ds | 10−9m2 s−1 | 0 |
Kinetic coefficient | β0 | s m−1 | 1.0 |
Capillary anisotropy strength | εc | – | 0.03 |
Kinetic anisotropy strength | εk | – | 0 |
Diffusive velocity of CG model | \({V}_{{{{\rm{D}}}}}^{{{{\rm{CG}}}}}\) | m s−1 | 6.7 |
Diffusive velocity of PF model | \({V}_{{{{\rm{D}}}}}^{{{{\rm{PF}}}}}\) | m s−1 | 2.0 |
