Microstructure Properties of Rapidly Solidified Al-Zn-Mg-Cu Alloys

Table 1

Rietveld refinement results of Al-8%Zn-4%Mg-x%Cu, 𝑥=1, 4, 8, and 10 (in wt.%) melt spun alloys.

Sample	Preferred ordination; parameter	Lattice constant (Å) and volume (𝑉) of unit cell (Å^3) for 𝛼-Al	Average crystallite; size (nm)	𝜀%	Agreement factors
					𝑅p	𝑅wp	𝑅exp	GOF
1% Cu	0.98	4.06043; 𝑉=66.94	38	0.072	7.49	10.67	9.10	1.37
4% Cu	0.87	4.05462; 𝑉=66.66	26	0.127	5.78	7.78	6.39	1.48
8% Cu	0.82	4.05004; 𝑉=66.43	22	0.196	5.67	7.60	5.84	1.69
10% Cu	0.85	4.05013; 𝑉=66.44	30	0.163	4.74	6.52	5.82	1.25