Research Article
Spheroidization and Coarsening of Eutectic Si Particles in Al-Si-Based Alloys
Table 4
Characteristics of Si particles in 356 alloy at different conditions (nonmodified (coded B) and Sr-modified (coded BS) conditions).
| Alloy code | Solutionizing time (h) | Particle area (μm2) | Sphericity (%) | Roundness (%) | Aspect ratio | Density (particles/mm2) |
| B | As-cast | μ = 14.30 | μ = 41.60 | μ = 36.30 | μ = 2.44 | μ = 27000 | σ = 11.70 | σ = 22.70 | σ = 19.00 | σ = 1.53 | 8 | μ = 21.50 | μ = 72.50 | μ = 46.30 | μ = 1.83 | μ = 1200 | σ = 17.30 | σ = 18.00 | σ = 17.70 | σ = 1.53 | 24 | μ = 27.50 | μ = 42.50 | μ = 50.30 | μ = 1.63 | μ = 4200 | σ = 19.30 | σ = 18.00 | σ = 17.70 | σ = 1.50 | 50 | μ = 33.70 | μ = 72.90 | μ = 56.40 | μ = 1.73 | μ = 7000 | σ = 22.80 | σ = 16.30 | σ = 16.90 | σ = 0.81 | 100 | μ = 48.00 | μ = 78.20 | μ = 64.90 | μ = 1.78 | μ = 3500 | σ = 48.70 | σ = 18.10 | σ = 24.20 | σ = 0.98 | 200 | μ = 69.10 | μ = 79.20 | μ = 63.80 | μ = 1.79 | μ = 2700 | σ = 44.10 | σ = 18.30 | σ = 24.10 | σ = 1.12 | 400 | μ = 77.60 | μ = 81.00 | μ = 66.80 | μ = 1.71 | μ = 3100 | σ = 63.70 | σ = 18.80 | σ = 22.70 | σ = 1.15 | 1200 | μ = 85.60 | μ = 87.00 | μ = 69.80 | μ = 1.51 | μ = 3900 | σ = 45.70 | σ = 15.80 | σ = 22.70 | σ = 1.15 |
| BS | As-cast | μ = 6.82 | μ = 54.90 | μ = 46.30 | μ = 1.88 | μ = 44000 | σ = 6.05 | σ = 23.20 | σ = 17.50 | σ = 0.81 | 8 | μ = 15.30 | μ = 75.50 | μ = 62.20 | μ = 1.53 | μ = 17000 | σ = 11.60 | σ = 17.40 | σ = 15.20 | σ = 0.56 | 24 | μ = 21.30 | μ = 76.50 | μ = 63.20 | μ = 1.00 | μ = 4350 | σ = 15.60 | σ = 17.40 | σ = 14.70 | σ = 0.56 | 50 | μ = 28.40 | μ = 78.30 | μ = 64.80 | μ = 1.54 | μ = 7000 | σ = 20.90 | σ = 15.2 | σ = 14.70 | σ = 0.90 | 100 | μ = 42.60 | μ = 82.70 | μ = 67.50 | μ = 1.53 | μ = 5100 | σ = 40.30 | σ = 15.60 | σ = 17.80 | σ = 0.74 | 200 | μ = 60.00 | μ = 85.80 | μ = 69.90 | μ = 1.45 | μ = 3800 | σ = 43.70 | σ = 14.40 | σ = 17.10 | σ = 0.58 | 400 | μ = 77.90 | μ = 82.60 | μ = 69.00 | μ = 1.56 | μ = 4100 | σ = 65.00 | σ = 18.00 | σ = 21.00 | σ = 0.93 | 1200 | μ = 93.90 | μ = 86.60 | μ = 77.00 | μ = 1.35 | μ = 3800 | σ = 50.00 | σ = 15.00 | σ = 18.00 | σ = 0.83 |
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