Fig. 12. Microstructure of Al-12Si-1Mg-1Cu piston alloys: 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. 12. Microstructure of Al-12Si-1Mg-1Cu piston alloys: 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)