Mechanical Performance of Zr-Containing 354-Type Al-Si-Cu-Mg Cast Alloy: Role of Additions and Heat Treatment

Table 5

Variation in average UTS, YS, % El, Qc, and Q values of the alloys studied in as-cast, SHT, and T5- and T6-treated conditions obtained at ambient temperature.

Alloy	Condition	UTS (MPa)	YS (MPa)	Total strain (%)	Plastic strain (%)	E (GPa)	n	K	q	Qc (Equation (2))	Q (Equation (1))	Difference (Q − Qc) (MPa)
M1S	As-cast	260.86	194.39	1.58	1.16	62.66	0.18	580.56	0.07	277.88	290.50	12.62
	SHT	300.34	202.51	6.22	5.74	62.50	0.17	579.26	0.34	512.36	419.43	−92.93
	T5	289.50	258.75	0.94	0.48	63.06	0.13	591.69	0.04	217.06	285.43	68.38
	T6	341.95	324.99	1.1075	0.56	62.45	0.10	576.91	0.06	281.53	348.60	67.07
M2S	As-cast	320.35	235.85	1.63	1.16	67.58	0.19	763.78	0.06	342.14	352.19	10.05
	SHT	327.74	212.61	3.20	2.70	66.23	0.17	759.32	0.16	531.09	403.43	−127.66
	T5	299.97	277.19	0.80	0.34	65.64	0.15	701.96	0.02	167.10	285.22	118.12
	T6	362.33	351.57	0.80	0.24	64.71	0.11	707.79	0.02	196.04	348.16	152.12
M3S	As-cast	325.78	245.72	1.76	1.26	64.73	0.15	648.89	0.08	354.71	362.55	7.84
	SHT	334.75	209.43	3.81	3.30	64.47	0.12	646.47	0.27	549.26	421.97	−127.29
	T5	314.58	279.39	0.98	0.49	64.14	0.13	634.49	0.04	238.21	313.10	74.89
	T6	357.01	355.14	0.75	0.20	64.32	0.08	624.21	0.02	192.02	338.50	146.48
M4S	As-cast	304.40	224.61	1.33	0.87	66.10	0.20	836.77	0.04	293.64	322.87	29.23
	SHT	312.32	207.09	2.22	1.75	66.56	0.18	821.35	0.10	469.59	364.27	−105.32
	T5	276.44	254.14	0.71	0.31	68.43	0.20	857.07	0.02	99.28	254.51	155.24
	T6	315.98	315.98	0.5705	0.11	67.10	0.10	634.74	0.01	77.52	279.41	201.89
M5S	As-cast	297.07	226.59	1.27	0.83	66.91	0.20	792.01	0.04	273.91	312.80	38.89
	SHT	299.79	206.64	1.99	1.54	67.35	0.17	780.35	0.09	437.14	344.62	−92.52
	T5	284.61	277.00	0.66	0.22	64.74	0.15	722.11	0.01	97.20	257.45	160.25
	T6	314.04	314.04	0.56	0.11	67.89	0.11	677.64	0.01	45.43	276.32	230.89