2006
DOI: 10.1016/j.jmatprotec.2006.02.012
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Grain refining of conventional and semi-solid A356 Al–Si alloy

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Cited by 96 publications
(41 citation statements)
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“…Additionally, products with high dimensional accuracy and reduced shrinkage porosity can be obtained owing to the lower solidification shrinkage than that in casting processes. Hence, recent studies have attempted to apply this process to the forming of aluminum alloys 1,2) and magnesium alloys. 3,4) However, semi-solid metals possess higher viscosity and also lower temperatures than the liquid state and hence exhibit low fluidity, which causes low formability.…”
Section: Introductionmentioning
confidence: 99%
“…Additionally, products with high dimensional accuracy and reduced shrinkage porosity can be obtained owing to the lower solidification shrinkage than that in casting processes. Hence, recent studies have attempted to apply this process to the forming of aluminum alloys 1,2) and magnesium alloys. 3,4) However, semi-solid metals possess higher viscosity and also lower temperatures than the liquid state and hence exhibit low fluidity, which causes low formability.…”
Section: Introductionmentioning
confidence: 99%
“…Nafisi and Banerji proposed that TiC particles are unstable in the melt in the way that they are easily transformed into Al 4 C 3 . As the structure of Al 4 C 3 is hexagonal, and Al 4 C 3 has a poor matching ability with a-Al, which results in TiC loss its nucleation ability [14,15]. In our previous experiment, the Al-5Ti-0.25C-2RE master alloy was used to refine pure aluminum, and a good refining effect was obtained with only 0.5 wt% master alloy.…”
Section: Discussionmentioning
confidence: 98%
“…It was reported earlier that the Ti presence in an inoculated A356 alloy increased its liquidus temperature and, hence, the nucleation started higher in the cooling curve. [33] The absence of recalescence is not uncommon in Al-Si alloys inoculated with a higher amount of Al-5Ti-1B master alloy and at moderate cooling rates, e.g., 2 K/s (2°C/s). [34,35] This happens as a result of an increased number of heterogeneous nucleation events aided by numerous nucleant particles present in the alloy at higher additions of master alloy (2 wt pct here).…”
Section: Mechanisms Of Grain Refinementmentioning
confidence: 98%
“…A similar mechanism is explained for A356 alloy inoculated with Al-5Ti-1B master alloy. [43] C. Mechanical Properties of A357 Alloys Mechanical behavior of A357 alloys cast under different conditions, with and without grain refiner, is shown in Figure 18 and Table II. A systematic improvement in both strength and ductility with respect to the addition of the oxide-containing master alloy and ultrasonication is obvious. A minimum of 10 and 50 pct increase in strength and ductility, respectively, was achieved in an A357 alloy inoculated with oxides and treated with ultrasonic cavitation in comparison with the reference alloy.…”
Section: Mechanisms Of Grain Refinementmentioning
confidence: 99%