Published 03/24/2025 at 1546 × 495 in Increasing the conductivity of aluminium high-pressure die casting alloy AlSi9Cu3Fe (226D) by Sr modification of eutectic and intermetallic phases Fig. 12. Cumulative frequency of Si phase structure in 1 mm casting: (a) Si phase area and (b) Si phase AND. Fig. 12. Cumulative frequency of Si phase structure in 1 mm casting: (a) Si phase area and (b) Si phase AND.