Effect of Fe-Content on the Mechanical Properties of Recycled Al Alloys during Hot Compression

Lu, Hongzhou; Hou, Zhiwen; Ma, Mingzhu; Lu, Guimin

doi:10.3390/met7070262

Cited by 15 publications

(7 citation statements)

References 20 publications

(22 reference statements)

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“…For instance, the energy needed for producing secondary aluminium through recycling scraps is less than 7 % of the counterpart amount needed for producing primary aluminium. Therefore, about half of aluminium products are made from secondary aluminium, and this proportion is increasing [1][2][3]. Despite the benefits of aluminium recycling, this process infects the composition of aluminium alloys by adding undesirable elements like Fe [1,[3][4][5].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, about half of aluminium products are made from secondary aluminium, and this proportion is increasing [1][2][3]. Despite the benefits of aluminium recycling, this process infects the composition of aluminium alloys by adding undesirable elements like Fe [1,[3][4][5]. For more explanations, the increased Fe-content is believed to be destructive for aluminium alloys since this element attends to the formation of different insoluble intermetallic compounds.…”

Section: Introductionmentioning

confidence: 99%

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Grain refinement, texture evolutions, and strengthening of a recycled aluminium alloy subjected to tube channel pressing

Farshidi¹,

Rifai²,

Miyamoto³

2023

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This works aims to study the grain refinement, the texture evolutions, and the strengthening of the recycled Al-1.7Fe-0.9Si-0.5Cu alloy subjected to a recently developed severe plastic deformation process called tube channel pressing. For this purpose, an electron backscattered diffraction equipped scanning electron microscope is applied to investigate the grain refinement and the texture evolutions while the tension test is applied for the measurement of strength. Results show that the imposition of the first pass of the process causes an extensive refinement of grains besides a considerable increase in strength. Despite this, the imposition of additional passes causes a little grain refinement besides a minor strength decrease. Additionally, vital texture components related to the shear deformation have risen because of the imposition of the process. Also, the mechanisms responsible for these phenomena are discussed.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Grain refinement, texture evolutions, and strengthening of a recycled aluminium alloy subjected to tube channel pressing

Farshidi¹,

Rifai²,

Miyamoto³

2023

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“…However, in the repeated Al scrap sorting, remelting and remanufacturing processes, detrimental impurity elements are gradually accumulated, resulting in degraded mechanical properties for the recycled Al alloys. Fe, in particular, is the most detrimental element for almost all Al alloys because it has a very low solid solubility (0.05 wt.%) in Al matrix at room temperature, forming different types of Fe-rich intermetallic compounds depending on the actual alloy compositions [4][5]. The most common Fe-rich phases in recycled Al alloys containing Fe and Si are α-Fe phase (Al8Fe2Si) and β-Fe phase (Al9Fe2Si2), called α-Fe and β-Fe hereafter.…”

Section: Introductionmentioning

confidence: 99%

Characterization of the Convoluted 3D Intermetallic Phases in a Recycled Al Alloy by Synchrotron X-ray Tomography and Machine Learning

Qin

Guo

et al. 2021

Acta Metall. Sin. (Engl. Lett.)

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Fe-rich intermetallic phases in recycled Al alloys often exhibit complex and 3D convoluted structures and morphologies. They are the common detrimental intermetallic phases to the mechanical properties of recycled Al alloys. In this study, we used synchrotron X-ray tomography to study the true 3D morphologies of the Ferich phases, Al2Cu phases and casting defects in an as-cast Al-5Cu-1.5Fe-1Si alloy.Machine learning based image processing approach was used to recognize and segment the different phases in the 3D tomography image stacks. In the studied condition, the β-Al9Fe2Si2 and ω-Al7Cu2 are found to be the main Fe-rich intermetallic phases. The β-Al9Fe2Si2 phases exhibit a spatially connected 3D network structure and morphology which in turn control the 3D spatial distribution of the Al2Cu phases and the shrinkage cavities. The Al3Fe phases formed at the early stage of solidification affects to a large extent the structure and morphology of the subsequently formed Ferich intermetallic phases. The machine learning method has been demonstrated as a powerful tool for processing big datasets in multidimensional imaging-based materials characterization work.

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“…As a minor alloying element, iron (Fe) has been used sometimes in aluminum bronze alloy to enhance mechanical properties such as hardness. During solidification, iron leads to the formation of complex intermetallic phases, and these phases can affect mechanical properties, especially hardness [12–14].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the corrosion behavior of aluminum bronze alloy in alkaline environment

Asgari

Foratirad

Golabadi

et al. 2021

Materialwissenschaft Werkst

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In this study, the effect of amino‐based additives including ammonia, ethanolamine and a mixture of two additives on the pH change of condenser water and corrosion behavior of aluminum bronze alloy as a structural material of condenser were investigated. The results of polarization curves, wheel tests and inductively coupled plasma showed that by increasing the pH from 8.5 to 10.5, the corrosion rate of aluminum bronze alloy and the dissolution rate of alloying elements are increased. The effect of amino‐based additives at the same pH is similar to each other. A comparison of corrosion rates determined by polarization curves. The corrosion rates for solutions contained ammonia and ethanolamine additives at pH = 10.5, were 2.92 ⋅ 10−2 and 4.55 ⋅ 10−2 mm/y respectively. The wheel test results indicated that the corrosion rates of solutions containing different additives increased to 1.1028 mm/y and 0.4504 mm/y for solutions containing ammonia and ethanolamine, respectively. Therefore, due to similar environmental conditions in the condenser and the wheel test because of the presence perturbation and biphasic fluid, it can be concluded that at pH above 10, aluminum bronze alloy has lower corrosion rate in the cooling water containing ethanolamine than ammonia additives.

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Effect of Fe-Content on the Mechanical Properties of Recycled Al Alloys during Hot Compression

Cited by 15 publications

References 20 publications

Grain refinement, texture evolutions, and strengthening of a recycled aluminium alloy subjected to tube channel pressing

Grain refinement, texture evolutions, and strengthening of a recycled aluminium alloy subjected to tube channel pressing

Characterization of the Convoluted 3D Intermetallic Phases in a Recycled Al Alloy by Synchrotron X-ray Tomography and Machine Learning

Investigation of the corrosion behavior of aluminum bronze alloy in alkaline environment

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