Effect of Rare Earth Metals, Sr, and Ti Addition on the Microstructural Characterization of A413.1 Alloy

Table 4

(a) Silicon particle characteristics of A413.1 alloys (no Sr), graphite mold

Alloy code	Composition				Silicon particle characteristics						Eutectic temp; (°C)
	Aimed		Actual		Area; (µm^2)		Length; (µm)		Aspect; ratio	Density; (number/mm^2)
	La (wt%)	Ce (wt%)	La (wt%)	Ce (wt%)	Average	SD	Average	SD
TE	0	0	0	0	31.88	73.21	11.62	16.56	2.77	2662	574
TE10	0.2	0	0.187	0	17.67	28.56	8.27	9.36	2.55	3695	571
TE1	0.5	0	0.284	0	37.74	77.81	12.48	16.34	2.69	2224	572
TE2	1	0	0.717	0	33.48	78.40	10.77	14.55	2.47	2129	571
TE3	1.5	0	0.940	0	39.89	99.13	11.06	16.15	2.34	2365	570
TE11	0	0.2	0.022	0.083	20.00	31.48	9.28	10.43	2.78	3200	567
TE4	0	0.5	0.237	0.308	36.76	82.67	11.14	16.07	2.41	1965	571
TE5	0	1	0.067	0.300	42.22	94.57	12.33	17.83	2.47	1899	571
TE6	0	1.5	0.078	0.634	39.55	90.24	11.90	17.26	2.52	2394	571
TE7	0.5	0.5	0.321	0.163	31.06	73.44	10.20	14.80	2.46	2544	571
TE8	1	1	0.511	0.387	38.12	72.24	13.57	14.09	2.39	1850	572
TE9	1.5	1.5	0.840	0.497	46.62	98.33	15.48	15.67	2.38	1318	571

Note. Mold temperature: 600°C.
SD: standard deviation.

(b) Silicon particle characteristics of A413.1 alloys (with Sr), graphite mold

Alloy code	Composition						Silicon particle characteristics						Eutectic temp; (°C)
	Aimed			Actual			Area; (μm^2)		Length; (μm)		Aspect; ratio	Density; (number/mm^2)
	Sr (ppm)	La (wt%)	Ce (wt%)	Sr (ppm)	La (wt%)	Ce (wt%)	Average	SD	Average	SD
TES	100	0	0	0.0088	0	0	2.35	1.25	0.95	0.12	1.35	45435	568
TE10S	100	0.2	0	78	0.187	0	3.248	4.687	2.772	3.920	1.921	41495	571
TE1S	100	0.5	0	87	0.284	0	6.981	8.023	5.584	6.586	2.188	5376	567
TE2S	100	1	0	65	0.717	0	6.785	8.011	5.079	6.574	2.104	15613	569
TE3S	100	1.5	0	79	0.94	0	11.700	26.650	7.287	8.096	2.164	4402	568
TE11S	100	0	0.2	193	0.022	0.083	3.556	4.983	2.890	3.836	2.019	26520	570
TE4S	100	0	0.5	123	0.237	0.308	3.110	4.426	2.806	2.812	1.968	44959	570
TE5S	100	0	1	81	0.067	0.300	5.914	10.290	4.193	4.316	2.071	4165	567
TE6S	100	0	1.5	80	0.078	0.634	7.839	14.970	4.648	5.280	2.020	18047	569
TE7S	100	0.5	0.5	79	0.321	0.163	4.884	6.043	3.679	4.948	2.233	15065	568
TE8S	100	1	1	84	0.511	0.387	9.330	11.650	5.682	8.138	2.274	4557	568
TE9S	100	1.5	1.5	81	0.84	0.497	16.876	7.541	7.237	9.321	2.086	4912	572

Note. Mold temperature: 600°C.
SD: standard deviation.