Effect of Solidification Rate and Rare Earth Metal Addition on the Microstructural Characteristics and Porosity Formation in A356 Alloy

Figure 11

(a) Elemental distribution of Si, La, Sr, and P corresponding to a backscattered electron image showing La-rich platelet and surrounding Si particles in 100 ppm Sr-modified A356 alloy containing 1.025% wt.% La; (b) EDS spectrum of the La-rich platelet. Note the presence of P at the center of the Sr (circled areas).

(a)

(b)