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

Figure 17

(a) Secondary electron image showing porosity in A356 alloy containing 1.025 wt.% La and no Sr (sample SDAS ~ 42 μm). (b) EDS spectrum corresponding to the La-rich phase platelet (black arrow) in (a).

(a)

(b)