Table 2: Results of nodularity for samples before and after heat treatment.

TypeRC* (<0.65) (%)RC (0.65–0.8)RC (0.8–1)

Al–15% Mg2Si (as cast)403624
Al–15% Mg2Si (heat treated)22.7340.9136.36
Al–20% Mg2Si (as cast)90010
Al–20% Mg2Si (heat treated)13.4617.3169.23
Al–25% Mg2Si (as cast)90.914.554.55
Al–25% Mg2Si (heat treated)37.2125.5837.21

*Radius of curvature.