Fig. 3. Optical micrographs of the Al-3Si-2Mg-0.5Mn-1Fe alloy billets solidified with and without shearing during DC casting: (a), (d), (g) illustrating the overall change in grain structure (anodized samples), (b), (e), (h) overall un-etched microstructure, and (c), (f), (i) showing the morphological change of the Fe–containing intermetallics and distribution of the Mg2Si phase.

Fig. 3. Optical micrographs of the Al-3Si-2Mg-0.5Mn-1Fe alloy billets solidified with and without shearing during DC
casting: (a), (d), (g) illustrating the overall change in grain structure (anodized samples), (b), (e), (h) overall un-etched
microstructure, and (c), (f), (i) showing the morphological change of the Fe–containing intermetallics and distribution
of the Mg2Si phase.