Fig. 14. SEM images of Al-12Si-1Mg-1Cu piston alloys aged at 225°C for 90 minutes: a) cast Alloy 1(AC); b) trace-Zr-added Alloy 2(AC); c) solution- treated Alloy 1(ST); and d) trace-Zr-added solution-treated Alloy 2(ST)

Fig. 14. SEM images of Al-12Si-1Mg-1Cu piston alloys aged at 225°C for 90 minutes: a) cast Alloy 1(AC); b) trace-Zr-added Alloy 2(AC); c) solution-
treated Alloy 1(ST); and d) trace-Zr-added solution-treated Alloy 2(ST)