Figure 4. Examples of microstructures of AlSi7Mg0.3 alloy processed by ultrasound, at 19.9 ± 0.2 kHz average frequency evaluated in a vertical section of the feeder: (a) V#1; (b) V#2 and (c) V#3 samples, according to Figure 1.

Figure 4. Examples of microstructures of AlSi7Mg0.3 alloy processed by ultrasound, at 19.9 ± 0.2 kHz average frequency evaluated in a vertical section of the feeder: (a) V#1; (b) V#2 and (c) V#3 samples, according to Figure 1.

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