Table 1: The physical properties of Ti Al alloy used in simulation.
| Parameter/physical property | Value |
|---|---|
| Liquidus temperature, TL/(K) | 1830 |
| Liquidus slope, ml(K/wt. %) | -7.9 |
| Equilibrium partition coefficient, k0 | 0.78 |
| Gibbs-Tompson coefficient, (K.m) | 2.4 × 10-7 |
| Solute diffusion coefficient in the liquid, Dl (m2/s) | 3 × 10-9 |
| Alloy initial composition, C0 (at.%) | 45 |
| Welding thermal efficiency, η | 0.75 |
| Welding voltage, U(V) | 13.8 |
| Welding current, I(A) | 90 |
| Energy concentration factor, K (1/m2) | 5 |
| Surrounding medium temperature, Tf (K) | 297 |