Advances in Materials Science and Engineering

Research Article

Effects of La and Ce Addition on the Modification of Al-Si Based Alloys

Table 4

(a) Effect of La on recalescence observed in 356 alloy. (b) Effect of Ce on recalescence observed in 356 alloy. (c) Effect of La and Ce on recalescence observed in 356 alloy.

(a)


Alloy code	Composition				Recalescence of eutectic solidification
	Aimed		Actual		Te₁	Te₂	ΔTe	te₁	te₂	Δte
	La (wt%)	Ce (wt%)	La (wt%)	Ce (wt%)	Te₁	Te₂	ΔTe	te₁	te₂	Δte

T10	0.2	0	0.17	0	570.0	570.0	0	0	0	0
T1	0.5	0	0.36	0	565.2	566.4	1.3	239.8	260.2	20.4
T3	1.5	0	1.25	0	560.9	563.2	2.0	257.0	281.2	24.2

(b)


Alloy code	Composition				Recalescence of eutectic solidification
	Aimed		Actual		Te₁	Te₂	ΔTe	te₁	te₂	Δte
	La (wt%)	Ce (wt%)	La (wt%)	Ce (wt%)	Te₁	Te₂	ΔTe	te₁	te₂	Δte

T11	0	0.2	0	0.08	562.1	562.8	0.7	326.8	367.0	40.2
T4	0	0.5	0	0.39	566.8	567.5	0.7	257.4	280.4	23.0
T5	0	1.0	0	0.82	566.2	566.8	0.6	255.0	277.2	22.2

(c)


Alloy code	Composition				Recalescence of eutectic solidification
	Aimed		Actual		Te₁	Te₂	ΔTe	te₁	te₂	Δte
	La (wt%)	Ce (wt%)	La (wt%)	Ce (wt%)	Te₁	Te₂	ΔTe	te₁	te₂	Δte

T7	0.5	0.5	0.44	0.382	567.0	567.0	0	0	0	0
T8	1.0	1.0	0.78	0.77	562.72	563.78	1.05	296.0	321.6	25.6
T9	1.5	1.5	1.27	1.531	558.45	561.08	2.61	321.4	355.2	33.8