Electromagnetic Stirring versus ECAP: Morphological Comparison of Al-Si-Cu Alloys to Make the Microstructural Refinement for Use in SSM Processing

Table 3

Microstructural characterization of the Al-4.0wt%Si-2.5wt%Cu alloy.

	Treatment time [s]	Globule size [μm]	Circularity	Grain size [μm]	RQI
As, cast		35 ± 3	0.43 ± 0.19	75 ± 11	0.20 ± 0.07
EMS	0	49 ± 4	0.52 ± 0.17	109 ± 30	0.24 ± 0.08
	30	58 ± 4	0.52 ± 0.17	100 ± 24	0.30 ± 0.08
	90	62 ± 6	0.54 ± 0.17	110 ± 26	0.31 ± 0.10
ECAP	0	38 ± 3	0.62 ± 0.15	71 ± 12	0.33 ± 0.08
	30	44 ± 3	0.65 ± 0.14	72 ± 13	0.40 ± 0.09
	90	47 ± 4	0.66 ± 0.15	75 ± 10	0.41 ± 0.09