Effect of Cd micro-addition on microstructure and mechanical properties in ternary Al-Si-Cu alloy

Quantifying the effects of Sn on θ′-Al2Cu precipitation kinetics in Al–Cu alloys

“…The foils of 10 × 10 × 0.5 mm 3 were cut from the peak-aging heat treatment sample and mechanically thinned to about 80 µm. Disks of 3 mm diameters were then stamped out from the foils and then thinned by twin-jet electropolished in a 30%vol nitric acid and 70%vol methanol at −25°C with a voltage of 20 V. The number density of precipitates is obtained by [18], where N is the number of precipitates in the view field, A is the area of the image, is the mean equivalent length of precipitates and t is the foil thickness which is assumed to be 100 nm according to the literature [19]. In addition, the volume fraction ( ) of the precipitates is estimated by [20], where is the mean equivalent thickness of precipitates.…”

Research Progress on Multi-Component Alloying and Heat Treatment of High Strength and Toughness Al–Si–Cu–Mg Cast Aluminum Alloys

“…Studies show that the mechanical properties and fracture behavior of cast aluminum alloy mainly depend on the microstructure characteristics of different scales, and alloy elements and heat treatment play an important role in the microstructure evolution and mechanical properties regulation [ 9 , 10 ]. Cao et al [ 11 ] found that the addition of the microalloying element Cd not only promoted the precipitation of θ’-Al 2 Cu phase, but also refined the size of θ’-Al 2 Cu phase. Zhang et al [ 12 ] found that the Sc element can refine grain and change the morphology of eutectic Si, and form a new nano-precipitated phase to provide an additional fine grain strengthening and precipitation strengthening effect.…”