Research Article
Spheroidization and Coarsening of Eutectic Si Particles in Al-Si-Based Alloys
Table 5
Characteristics of Si particles in 413 alloy at different conditions (nonmodified (coded C) and Sr-modified (coded CS) conditions).
| Alloy code | Solutionizing time (h) | Particle area (μm2) | Sphericity (%) | Roundness (%) | Aspect ratio | Density (particles/mm2) |
| C | As-cast | μ = 19.00 | μ = 44.00 | μ = 36.60 | μ = 3.87 | Μ = 18000 | σ = 19.60 | σ = 23.10 | σ = 16.70 | σ = 1.08 | 8 | μ = 17.30 | μ = 66.90 | μ = 50.00 | μ = 2.31 | Μ = 9800 | σ = 16.00 | σ = 25.10 | σ = 22.10 | σ = 1.27 | 24 | μ = 14.90 | μ = 74.20 | μ = 51.70 | μ = 2.10 | Μ = 8200 | σ = 14.80 | σ = 20.10 | σ = 19.20 | σ = 1.03 | 50 | μ = 27.60 | μ = 73.20 | μ = 52.50 | μ = 2.02 | Μ = 6300 | σ = 19.40 | σ = 19.80 | σ = 19.00 | σ = 0.95 | 100 | μ = 42.00 | μ = 73.50 | μ = 52.90 | μ = 2.01 | Μ = 4400 | σ = 29.40 | σ = 19.00 | σ = 18.40 | σ = 0.91 | 200 | μ = 61.50 | μ = 74.10 | μ = 54.60 | μ = 1.99 | Μ = 3400 | σ = 36.80 | σ = 18.30 | σ = 19.10 | σ = 0.90 | 400 | μ = 72.50 | μ = 76.10 | μ = 55.2 | μ = 1.82 | Μ = 2800 | σ = 35.6 | σ = 17.40 | σ = 17.10 | σ = 0.70 | 1200 | μ = 91.50 | μ = 78.10 | μ = 60.40 | μ = 1.52 | Μ = 1900 | σ = 31.2 | σ = 16.30 | σ = 17.30 | σ = 0.70 |
| CS | As-cast | μ = 3.59 | μ = 52.70 | μ = 46.50 | μ = 1.96 | μ = 34000 | σ = 6.28 | σ = 23.90 | σ = 20.90 | σ = 0.78 | 8 | μ = 6.11 | μ = 72.20 | μ = 57.00 | μ = 1.69 | μ = 18000 | σ = 6.59 | σ = 18.40 | σ = 15.90 | σ = 0.60 | 24 | μ = 10.50 | μ = 75.60 | μ = 61.50 | μ = 1.56 | μ = 10000 | σ = 9.99 | σ = 18.40 | σ = 15.80 | σ = 0.56 | 50 | μ = 16.50 | μ = 79.30 | μ = 62.30 | μ = 1.56 | Μ = 7500 | σ = 16.00 | σ = 18.20 | σ = 16.20 | σ = 0.53 | 100 | μ = 36.20 | μ = 79.20 | μ = 63.40 | μ = 1.57 | Μ = 5400 | σ = 24.00 | σ = 17.70 | σ = 16.50 | σ = 0.64 | 200 | μ = 47.30 | μ = 80.30 | μ = 64.20 | μ = 1.5 | Μ = 4400 | σ = 28.10 | σ = 16.10 | σ = 14.90 | σ = 0.467 | 400 | μ = 58.30 | μ = 82.40 | μ = 66.30 | μ = 1.5 | Μ = 3500 | σ = 21.2 | σ = 16.4 | σ = 13.90 | σ = 0.467 | 1200 | μ = 69.30 | μ = 85.30 | μ = 71.40 | μ = 1.5 | Μ = 3000 | σ = 22.10 | σ = 15.10 | σ = 14.4 | σ = 0.467 |
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