fig9

Figure 9. SEM analysis of as-cast and as-extruded alloys: (A and B) SEM image and its high-magnified view and (C-G) element mapping results including Mg, Al, Zn, Ca, and Mn in as-cast alloy; (H and I) SEM image and its high-magnified view and (J-N) element mapping results including Mg, Al, Zn, Ca, and Mn in as-extruded alloy. SEM: Scanning electron microscope.