Secondary cast Al-alloys with higher content of iron

Závodská, Denisa; Tillová, Eva; Švecová, Ivana; Kuchariková, Lenka; Chalupová, Mária

doi:10.1016/j.matpr.2018.08.135

Cited by 8 publications

(7 citation statements)

References 13 publications

(4 reference statements)

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“…Závodská et al. 22 states that iron is one of the most problematic impurities in aluminum castings. According to Mbuya et al., 23 the addition of suitable neutralizers such as Mn, Cr, Be, Co, Mo, Ni, V, W, Cu, Sr, or other rare earth elements such as Y, Nd, La, and Ce may control the deleterious effect of Fe in aluminum alloys.…”

Section: Theoretical Foundationmentioning

confidence: 99%

“…12 Compared to the primary aluminum production process, the secondary aluminum production process has a 95% reduction in electricity consumption. 16 Recycling activities play a role in conserving natural resources and reducing pollution. When pre-treated and properly classified, recycled aluminum can be used for almost all applications.…”

Section: Theoretical Foundationmentioning

confidence: 99%

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Metal matrix production: Casting of recycled aluminum cans and incorporation of rice husk ash and magnesium

Holzschuh

Dörr

Moraes

et al. 2020

Journal of Composite Materials

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This research experimented with different aluminum can casting compositions from recycled materials. The objective was to analyze the casting yield and the resulting chemical compositions of the process. In the first process, 20 kg of aluminum cans was melted, resulting in a 10.2 kg ingot, which presented a 51% yield. In the second process, 10 kg of 6063 T6 aluminum was used and 10.2 kg of the first casting was added. This mixture produced an ingot of 50% recycled aluminum and 50% 6063 aluminum that weighed 18.23 kg. Similarly, a second ingot was produced, but with the addition of 4 wt% of rice husk ash and 2 wt% of magnesium. From each ingot, the samples were removed for chemical analyses, which consisted of tests of the samples that had the incorporation of rice husk ash in the molten aluminum. These analyses included scanning by electron microscopy, density analysis, Brinell hardness, and Charpy impact force tests. The results of the second ingot analysis showed superior characteristics in Si and Mg levels due to the addition of rice husk ash and magnesium. Also, the second ingot presented increased hardness as well as a reduction fragility and density.

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Section: Theoretical Foundationmentioning

confidence: 99%

Section: Theoretical Foundationmentioning

confidence: 99%

Metal matrix production: Casting of recycled aluminum cans and incorporation of rice husk ash and magnesium

Holzschuh

Dörr

Moraes

et al. 2020

Journal of Composite Materials

View full text Add to dashboard Cite

show abstract

“…[ 5 ] However, the most important green‐business was demonstrated as being Al–Si alloy's Fe content as low as possible. [ 6 ] There was determined a critical Fe‐content directly associated with the concentration of silicon (Si) in the alloy. Investigations on the Al–Si–Fe phase diagram showed that for 5%, 7%, 9%, and 11 wt% Si, the respective maximum acceptable levels of Fe were 0.35%, 0.5%, 0.6%, and 0.75 wt%.…”

Section: Introductionmentioning

confidence: 99%

The Roles of Ni and Co in Dendritic Growth and Tensile Properties of Fe‐Containing Al–Si–Cu–Zn Scraps under Slow and Fast Solidification Cooling

et al. 2021

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Studies of Fe‐contaminated Al‐based scraps have drawn attention for years. However, little has been researched about the effects of cobalt (Co) and nickel (Ni) additions to contaminated scraps both under slow solidification (directional solidification, DS) and fast solidification regime (copper mold centrifugal casting, CC). As such, the current study examines a representative low‐alloy Al–Si chemistry from industrial scraps, i.e., the Al–7%Si–0.6%Fe–0.35%Cu–0.25%Zn (% by weight). This alloy is changed independently using Ni and Co. It is observed that a mixture of uneven distributed α and β Fe‐bearing particles prevails for all tested alloys and solidification conditions. The coexistence of both phases agrees with the charts proposed by Gorny's work for the range of secondary dendritic spacing, λ 2, observed. Although the Fe‐containing particles are smaller for fast‐solidified samples, they still maintain the acute morphology and, in some cases, the Chinese script shape. This results in a reduction in ductility of the order of 65% for the nonmodified and Ni‐modified samples considering mean λ 2 varying from 20 μm (DS) to 6.5 μm (CC), despite improvements in mechanical strength. Furthermore, addition of Co results in a higher number of Fe‐based particles within the microstructure. In this case, the largest particle/α‐Al interfacial area results in slightly poor ductility (~6–8%) and higher strength (175–205 MPa), with less ductility loss when DS and CC samples are compared.

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“…According to Ashtari et al (2012), iron is one of the most problematic impurities in aluminum castings. According to Zhang et al (2012), the addition of a suitable neutralizer such as Mn, Cr, Be, Co, Mo, Ni, V, W, Cu, Sr or other rare earth elements such as Y, Nd, La and Ce could control the deleterious effect of Fe in aluminum alloys (ZÁVODSKÁ et al, 2018).…”

Section: Recycling Aluminum Cansmentioning

confidence: 99%

Casting of recycled aluminum, Al + Cu + Mg alloy formation and lamination process of an electric current conductor

Holzschuh

Moraes

Garcia

et al. 2021

Preprint

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This research presents a methodology for the recycling process via casting, in which aluminum cans and primary (commercial) aluminum are transformed into a laminated tape, with the possibility of industrial application. This research was classified as bibliographic, exploratory, and experimental, since it used qualitative techniques to evaluate alternative materials. Its objective was to incorporate materials of different properties that could favor the making of a tape to be laminated. In the first casting, a recycled aluminum ingot was formed only with aluminum from beverage cans and had a material yield of 51%. In a second casting, commercial aluminum was added to the recycled aluminum ingot. After the casting process with the two cast materials, the ingot had a yield of 90%. A third casting was conducted together with the aluminum that was already formed by the ingot (50% recycled and 50% commercial). The purpose of this ingot was to incorporate other materials that could provide some characteristics, such as malleability and conductivity. The third casting was made from the second ingot, and incorporated copper and magnesium. For the design of the laminated tape, a cast was made to receive the molten aluminum from the third casting. The aluminum was cast into this mold and three tapes were produced, one with a thickness of 2 mm, another with a thickness of 3 mm and the last with a thickness of 4 mm. With these tapes, the objective was to laminate them in order to reduce their thickness to values close to 0.5 mm. The casting process of aluminum cans with the addition of commercial aluminum, plus the incorporation of copper and magnesium, demonstrated facilities for thickness reduction in the process of making laminated tapes.

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Secondary cast Al-alloys with higher content of iron

Cited by 8 publications

References 13 publications

Metal matrix production: Casting of recycled aluminum cans and incorporation of rice husk ash and magnesium

Metal matrix production: Casting of recycled aluminum cans and incorporation of rice husk ash and magnesium

The Roles of Ni and Co in Dendritic Growth and Tensile Properties of Fe‐Containing Al–Si–Cu–Zn Scraps under Slow and Fast Solidification Cooling

Casting of recycled aluminum, Al + Cu + Mg alloy formation and lamination process of an electric current conductor

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