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

Table 4

Characteristics of eutectic silicon particles in as-cast and solution heat-treated conditions of the alloys studied.

Alloy code and condition	Particle area (μm^2)		Particle length (μm)		Aspect ratio		Roundness (%)		Sphericity (%)
	Av	SD	Av	SD	Av	SD	Av	SD	Av	SD
M1S-AC	2.85	4.39	2.67	2.48	1.96	1.33	0.49	0.21	0.75	0.28
M1S-SHT	3.71	4.71	2.60	2.10	1.71	1.49	0.58	0.19	0.85	0.21
M2S-AC	3.53	7.60	2.83	3.29	1.96	2.44	0.50	0.23	0.74	0.30
M2S-SHT	5.67	8.08	3.27	2.95	1.79	1.27	0.56	0.20	0.81	0.23
M3S-AC	1.92	3.10	2.14	2.22	1.92	2.43	0.51	0.22	0.77	0.28
M3S-SHT	5.35	6.04	3.12	2.32	1.69	2.92	0.61	0.17	0.86	0.19
M4S-AC	3.11	6.61	2.65	3.30	2.02	3.58	0.50	0.25	0.73	0.32
M4S-SHT	3.99	5.53	2.68	2.43	1.86	2.65	0.56	0.22	0.82	0.23
M5S-AC	3.87	6.88	3.12	3.43	2.12	6.27	0.48	0.22	0.70	0.30
M5S-SHT	5.70	7.44	3.52	3.20	1.95	3.60	0.54	0.20	0.78	0.25