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

Table 3

Average secondary dendrite arm spacing of the examined A356 alloy samples.

Mold	Mold temp. (°C)	Mold section	(µm)
			Average	SD
Graphite	600	Center	68.63	5.49
Step-like	200	Large	31.56	2.92
	200	Small	16.17	1.89
	400	Large	41.66	3.02
	400	Small	22.46	3.96
Variable angle	325	Large	53.62	5.7
	325	Small	25.04	3.0

Secondary dendrite arm spacing obtained over 20 measurements per sample. SD: standard deviation.