Evolution of Fe–rich phases in Mg melt and a novel method for separating Al and Fe from Al–Si–Fe alloys

Gao, Tong; Li, Zengqiang; Zhang, Yaoxian; Qin, Jingyu; Liu, Xiangfa

doi:10.1016/j.matdes.2017.08.029

Cited by 37 publications

(5 citation statements)

References 26 publications

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“…D ue to their high strength, light weight and excellent casting properties, hypoeutectic Al-Si casting alloys are widely applied in automotive parts like the automobile hub, steering wheel and dash board [1][2][3][4][5][6][7][8] . The microstructure of hypoeutectic Al-Si alloys comprised primary α-Al, eutectic silicon and intermetallic compound [9] .…”

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confidence: 99%

Effect of Ca addition on solidification microstructure of hypoeutectic Al-Si casting alloys

et al. 2019

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The effect of Ca addition on the solidification microstructure of hypoeutectic Al-Si casting alloys was investigated using scanning electron microscopy (SEM) and differential scanning calorimetry (DSC) methods with particular attention focused on the change of morphologies of primary α-Al and eutectic silicon. Meanwhile, solute distribution in solid-liquid was simulated according to Scheil-Gulliver law. Results showed that primary α-Al and eutectic silicon were refined as Ca content increased because of the variation of the solute concentration in liquid. The addition of Ca increased the nucleation sites like Al 3 Ti or Al 2 Cu to promote the nucleation of primary α-Al. Affected by modification effect of Ca, the shape of eutectic silicon changed from flake to fibrous structure. In addition, coarse plate Ca-rich phases could be found along the grain boundary with high Ca content.

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confidence: 99%

Effect of Ca addition on solidification microstructure of hypoeutectic Al-Si casting alloys

et al. 2019

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“…The needle-like β-Al 5 FeSi phase is easy to cause stress concentration and split the matrix, which is unfavorable to the mechanical properties of recycled aluminum [5,6]. In addition, excessive iron content will lead to poor melt fluidity and reduce casting quality [7]. Therefore, many researchers are working to modify the morphology of β-Al 5 FeSi phases, such as by adding the alloying elements Mn, Nb, Co, Sc, Er, etc.…”

Section: Introductionmentioning

confidence: 99%

Effect of Cooling Rate on the Microstructure Evolution and Mechanical Properties of Iron-Rich Al–Si Alloy

et al. 2022

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The mechanical properties of iron-rich Al–Si alloy is limited by the existence of plenty of the iron-rich phase (β-Al5FeSi), whose unfavorable morphology not only splits the matrix but also causes both stress concentration and interface mismatch with the Al matrix. The effect of the cooling rate on the tensile properties of Fe-rich Al–Si alloy was studied by the melt spinning method at different rotating speeds. At the traditional casting cooling rate of ~10 K/s, the size of the needle-like β-Al5FeSi phase is about 80 μm. In contrast, the size of the β-Al5FeSi phase is reduced to 500 nm and the morphology changes to a granular morphology with the high cooling rate of ~104 K/s. With the increase of the cooling rate, the morphology of the β-Al5FeSi phase is optimized, meanwhile the tensile properties of Fe-rich Al–Si alloy are greatly improved. The improved tensile properties of the Fe-rich Al-Si alloy is attributed to the combination of Fe-rich reinforced particles and the granular silicon phase provided by the high cooling rate of the melt spinning method.

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“…The development of lightweight materials has received considerable attention due to sustainable development in many fields, especially energy, automotive, and aerospace applications. [1,2] Magnesium alloys have become attractive in recent years due to their low density, which is approximately two-thirds of aluminum, one-fourth of zinc, and one-fifth of steel. [3] Consequently, magnesium alloys are widely accepted as important structural materials, due to their excellent mechanical properties and low working temperature.…”

Section: Introductionmentioning

confidence: 99%

Effect of Adding AlN Ceramic Particles on the Micromorphology of the Mg₁₇Al₁₂ Phase in Magnesium Alloys

et al. 2021

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AlN particle–reinforced Mg–Al matrix composites are fabricated by introducing an Al–AlN master alloy in Mg melt during casting. The microstructure, tensile strength, and fracture behavior of the AlN/AZ91 composites are investigated. The introduction of AlN results in a modified dendrite morphology of the β‐Mg17Al12 phase and, thus, improves the mechanical properties of the AZ91 alloy. The results show that 2% (by weight) AlN reinforcement has the highest tensile strength and elongation, mainly due to the reduction of the size of the second phase and the uniform distribution. Consequently, compared to as‐cast AZ91 alloys, the strength and elongation of the AlN/AZ91 composites increase by 34% and 171%, respectively. For second‐phase β‐Mg17Al12, the enhancement mechanism and size model are constructed, and the model trends are analyzed, predicted, and verified experimentally.

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Evolution of Fe–rich phases in Mg melt and a novel method for separating Al and Fe from Al–Si–Fe alloys

Cited by 37 publications

References 26 publications

Effect of Ca addition on solidification microstructure of hypoeutectic Al-Si casting alloys

Effect of Ca addition on solidification microstructure of hypoeutectic Al-Si casting alloys

Effect of Cooling Rate on the Microstructure Evolution and Mechanical Properties of Iron-Rich Al–Si Alloy

Effect of Adding AlN Ceramic Particles on the Micromorphology of the Mg₁₇Al₁₂ Phase in Magnesium Alloys

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Evolution of Fe–rich phases in Mg melt and a novel method for separating Al and Fe from Al–Si–Fe alloys

Cited by 37 publications

References 26 publications

Effect of Ca addition on solidification microstructure of hypoeutectic Al-Si casting alloys

Effect of Ca addition on solidification microstructure of hypoeutectic Al-Si casting alloys

Effect of Cooling Rate on the Microstructure Evolution and Mechanical Properties of Iron-Rich Al–Si Alloy

Effect of Adding AlN Ceramic Particles on the Micromorphology of the Mg17Al12 Phase in Magnesium Alloys

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Effect of Adding AlN Ceramic Particles on the Micromorphology of the Mg₁₇Al₁₂ Phase in Magnesium Alloys