Sr. No. | Parameter | Description | Value |
1 | TL | Liquidus temperature | 2128 K |
2 | CoZr | Initial concentration of Zr in alloy | 0.65 wt % |
3 | Ri | Initial value of tip radius | 0.001 mm |
4 | Vi | Initial value of dendrite tip velocity | 2 mm/sec |
5 | Do | Proportionality constant | 0.492 mm2/sec |
6 | ao | Length scale related to interatomic distance | 0.000005 mm |
7 | Q | Activation energy for diffusion | 67,700 J∙mol−1 |
8 | Γ | Gibbs Thomson Coefficient | 1.90 × 10−4 (K mm) |
9 | Rg | Gas Constant | 8.314 (J∙mol−1∙K−1) |
10 | G | Thermal Gradient | 100 K/mm |
11 | Hf | Heat of fusion | 21,000 (J∙mol−1) |
12 | C | Constant related with unit thermal undercooling θt | 1 |