Solidification Behavior and Microstructure of Al-7Si Alloys with Individual and Combined Additions of Sr and Yb

Table 1

Targeted compositions of the experimental alloys (wt.%).

Sample	Si	Sr	Yb	Al
Unmodified	6.86	0	0	Balance
Sr modified	6.96	0.045	0	Balance
Yb modified	6.94	0	0.63	Balance
(Sr + Yb) modified	6.97	0.033	0.62	Balance