Effect of Mg addition on microstructure and mechanical properties of Al-Si-Cu-Fe alloy with squeeze casting

Jiang, Bo; Xu, Song; Xu, Hongbin; Hu, Maoliang; He, Yingjie; Ji, Zesheng

doi:10.1088/2053-1591/ab5cc6

Cited by 13 publications

(10 citation statements)

References 22 publications

(21 reference statements)

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“…The results show that during the solidification process of Al-Mg-Si aluminum alloy, the Mg/Si ratio mainly affects the size, morphology and distribution of the precipitated phase [19,20]. Figure 6 shows the SEM images and EDS energy spectra of the edges of Al-Mg-Si cast-rolled sheets at different Mg/Si ratios.…”

Section: Resultsmentioning

confidence: 99%

“…Zang [19] found that the Mg/Si ratio could adjust the grain size, texture and precipitated phase of Al-Mg-Si alloy, and then affected the formability of the sheet. Many studies have shown that an appropriate amount of Mg/Si could improve the formability, the microstructure and the properties of the aluminum sheets [20,21]. Therefore, precise control of the Mg/Si ratio is very important to investigate the formability of 6xxx series aluminum alloys.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Mg/Si ratio on the microstructure and formability of 6061 cast-rolled sheets

Sun,

Jin,

et al. 2024

Mater. Res. Express

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Three kinds of 6061 aluminum alloy cast-rolled plates with Mg/Si mass ratios of 1.23, 1.45, and 1.7 are prepared using NF6-300 vertical twin-roll casting and rolling mill. Metallurgical microscope (OM), X ray diffraction (XRD), scanning- electron microscope (SEM), energy dispersive spectrometer (EDS), room temperature tensile test, and other analysis methods studied the influence law and mechanism of Mg/Si ratio on the microstructure and texture of 6061 cast-rolled sheet. The best Mg/Si ratio cast-rolled sheet is then analyzed for formability. Researchindicates that with increasing Mg/Si ratio, the grain size shows first decreasing and then increasingtrend. Morphology of precipitated phases at the edge and the central of the sheet are different, however, the texture type has no obvious change, and a strong {112} <110> texture and weaker rotating cube {001} <110> texture is always observed. When the Mg/Si ratio is 1.45, the average grain size is the smallest, the edge size is 39.78μm, the central size is 31.31μm, and the precipitated phase is evenly distributed at the edge and central of the cast-rolled sheet. In addition, the elongation reaches 8.9%, the n-value is 0.072, and the r-value is 1.161 when the cast-rolled sheet reaches 90° along the cast-rolled direction under T6 state heat treatment.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of Mg/Si ratio on the microstructure and formability of 6061 cast-rolled sheets

Sun,

Jin,

et al. 2024

Mater. Res. Express

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“…When Si is added, the eutectic Si phase starts to come into the microstructures. At the eutectic composition, elongated needle-like and platelet eutectic silicon phases are formed, and in the case of hypereutectic composition, additional star-shaped blocky primary Si is formed [2,31,32]. Precipitates with different intermetallics appear in a darker tone, whereas Si-rich intermetallics appear in a lighter tone.…”

Section: Optical Micrographic Investigationmentioning

confidence: 99%

Impact of Deep Seawater on the Electrochemical Corrosion Performance of Hypoeutectic, Eutectic and Hypereutectic Al-Si Automotive Alloys

Khan,

Hossain,

Kaiser

2023

Int. J. Automot. Mech. Eng.

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Corrosion of aluminum alloys is a significant concern for shipbuilders to ensure the longevity of ocean vessels and equipment. Hence, the study aims to evaluate the corrosion performance of Al-Si as automotive alloys with varying concentrations of Si in deep seawater using electrochemical impedance spectroscopy and potentiodynamic polarization techniques. The surface condition prior to corrosion, as well as after corrosion, is analyzed using optical and scanning electron microscopy. The entire test is performed at an ambient condition. The results demonstrate that the corrosion resistance improves in alloys with increasing amounts of Si near the eutectic level, after which the corrosion protection deteriorates. Higher Si concentrations show higher values for polarization resistance and open circuit potential. In contrast, corrosion current and corrosion rate values decrease with increasing Si concentration up to eutectic composition. Si assists the formation of SiO2 and MgO films through Mg2Si intermetallics along with the Al2O3 on the surfaces, which aids in corrosion resistance. Optical and scanning electron micrographs reveal the presence of films on the surfaces after corrosion, which exhibit pits and pinholes on the surfaces of the alloys with lower Si concentrations. Hypereutectic alloy is affected by corrosion of its pinhole-like defects. The corresponding EDS analysis also confirms the protective layer of different oxides on the surfaces.

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“…These additive elements can be listed as copper, magnesium, and zinc, respectively. 1-4 (wt%) copper additive forms the θ (CuAl 2 ) phase in the α-Al phase and increases the strength and hardness of the alloy [18][19][20][21][22][23]. In addition, zinc improves the strength properties of the alloy as it dissolves in the α-Al phase.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Heat Treatment on the Mechanical Properties and Oxidation Resistance of AlSi10Mg Alloy

Beder,

Akçay,

Varol

et al. 2024

Arab J Sci Eng

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In this study, the microstructure, hardness, tensile strength, and dry wear properties of the cast AlSi10Mg alloy as well as the effects of processing parameters on the oxidation behavior of this alloy were investigated. In this context, AlSi10Mg (wt%) alloy was produced by gravity die casting method, and then, air cooling, quenching, and T6 treatment were applied. The microstructure of the alloy was investigated using an optical microscope, SEM, and EDS. Additionally, thermogravimetric analysis (TGA) was used to determine the effect of processing parameters on the oxidation behavior of the samples. The friction and wear properties of the alloy were investigated using a ball-on-disk wear test device. It was founded that the as-cast AlSi10Mg alloy's microstructure contained phases of α(Al), Si, and β-Mg2Si. It has been observed that the microstructure of the cast AlSi10Mg alloy gradually turns into a spherical form when quenching and air-cooling heat treatments are applied. Also, T6 heat treatment led to further spheroidization of Si particles, formation of β-Mg2Si precipitates, and elimination of the Chinese script morphology of the β-Mg2Si phase. It was observed that the yield strength of the AlSi10Mg alloy in the as-cast state decreased negligibly compared to the air-cooled state, while there was an increase of up to 70% in the aging-treated condition. The results show that the tensile strength of the as-cast AlSi10Mg alloy increased by 115% after aging. Additionally, it was found that the AlSi10Mg alloy's wear resistance increased with the aging process.

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Effect of Mg addition on microstructure and mechanical properties of Al-Si-Cu-Fe alloy with squeeze casting

Cited by 13 publications

References 22 publications

Influence of Mg/Si ratio on the microstructure and formability of 6061 cast-rolled sheets

Influence of Mg/Si ratio on the microstructure and formability of 6061 cast-rolled sheets

Impact of Deep Seawater on the Electrochemical Corrosion Performance of Hypoeutectic, Eutectic and Hypereutectic Al-Si Automotive Alloys

The Effect of Heat Treatment on the Mechanical Properties and Oxidation Resistance of AlSi10Mg Alloy

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