Table 1. Compositions (in at.%) of α and β phases in 10 mm and 20 mm samples obtained from APT data as well as the partitioning ratio of each element.
| Sample | Ti | σ (Ti) | Al | σ (Al) | V | σ (V) | Fe | σ (Fe) | O | σ (O) | C | σ (C) | N | σ (N) | H | σ (H) | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| α | 10 mm | 85.15 | 0.13 | 10.49 | 0.12 | 2.65 | 0.06 | 0.16 | 0.02 | 0.41 | 0.02 | 0.03 | 0.01 | 0.12 | 0.01 | 0.99 | 0.04 |
| 20 mm | 87.02 | 0.14 | 9.41 | 0.12 | 2.57 | 0.07 | 0.16 | 0.02 | 0.42 | 0.03 | 0.03 | 0.01 | 0.18 | 0.02 | 0.20 | 0.02 | |
| β | 10 mm | 68.22 | 0.18 | 3.13 | 0.07 | 23.68 | 0.16 | 3.28 | 0.07 | 0.24 | 0.02 | 0.03 | 0.01 | 0.13 | 0.01 | 1.29 | 0.04 |
| 20 mm | 65.66 | 0.21 | 2.32 | 0.07 | 27.43 | 0.20 | 3.34 | 0.08 | 0.20 | 0.02 | 0.03 | 0.01 | 0.16 | 0.02 | 0.86 | 0.04 | |
| k or k′ | 10 mm | 1.2 | 3.4 | 8.9 | 20.5 | 1.7 | 1.0 | 1.1 | 1.3 | ||||||||
| 20 mm | 1.3 | 4.1 | 10.7 | 20.9 | 2.1 | 1.0 | 1.1 | 4.3 |
The partitioning ratio k (for α-partitioning elements) or k′ (for β-partitioning elements) were defined as or k = Cα/Cβ or k′ = Cβ/Cα, respectively. The larger than unity for k or k′, the severer partitioning for the corresponding element.