Properties of Semisolid Parts: Comparison with Conventional and Innovative Manufacturing Technologies

Tonolini, Pietro; Pola, Annalisa; Montesano, Lorenzo; Tocci, Marialaura; Gelfi, Marcello; Vecchia, Giovina Marina La

doi:10.4028/www.scientific.net/ssp.327.197

Cited by 2 publications

(1 citation statement)

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“…Half of the billet was machined and subjected in as-cast condition to chemical analysis (Table 1) by a Thermofisher ARL 8860 optical emission spectrometer. The other half of the same billet was T6 heat treated (solution at 510 ± 2 °C for 2 hours, quenching in tap water at 60 ± 2 °C, and ageing at 160 ± 1 °C for 4 hours according to a previous study [10]) and machined. The electrical conductivity was measured at least 2 times for each UST specimen with Foerster Sigmatest 2.069 in both as-cast and T6 heat treated conditions.…”

Section: Methodsmentioning

confidence: 99%

Preliminary Investigation on the Use of Recycled A356 Alloy for Semi-Solid Processing

Mantelli,

Arcaleni,

Girelli

et al. 2023

SSP

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The continuous demand for lightweighting vehicles leads to a significant increase in the use of aluminium alloys in the automotive sectors. The Al-Si-Mg aluminium alloys are widely applied in foundry processes to produce structural components, due to their high specific mechanical properties combined with good castability and corrosion resistance. Primary (from bauxite) alloys are often used to ensure the highest quality of such parts, nevertheless their production route causes high CO2 emissions. With the goal of reducing cradle-to-grave emissions of vehicles secondary (from recycling) Al-Si-Mg alloys are often used for cast products, however their percentage of impurities is considered too high for structural components. Lately, some Al-Si-Mg recycled alloys with a low content of Fe are available on the market as an alternative to primary alloys. Alongside the traditional foundry processes, semi-solid techniques are known to be able to increase the performance of Al-Si alloys. In this paper, a preliminary microstructural and mechanical characterization of secondary A356 alloys, manufactured by the ultrasound semi-solid method, was performed. In detail, both high Fe and low Fe recycled A356 alloys were investigated in comparison to the traditional primary one. The effect of the T6 heat treatment was also taken into account.

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Section: Methodsmentioning

confidence: 99%