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

Table 3

Volume fractions (%) of undissolved intermetallic compounds in the matrix of as-cast and as-quenched alloys.

Volume fraction (%)		Alloy code
		M1S	M2S	M3S	M4S	M5S
As-cast	Average	2.51	6.17	4.34	12.21	8.79
	SD	0.41	0.56	0.36	0.77	0.79
SHT	Average	1.11	5.54	3.64	9.60	7.68
	SD	0.28	0.61	0.16	0.65	0.52