Microstructural evolution, dislocation density and tensile properties of Al–6.5Si–2.1Cu–0.35Mg alloy produced by different casting processes

Samat, Saziana; Omar, Mohd Zaidi; Baghdadi, Amir Hossein; Mohamed, Intan Fadhlina; Rajabi, Armin; Aziz, Ahmad Muhammad

doi:10.1016/j.jmst.2021.02.074

Cited by 23 publications

(2 citation statements)

References 51 publications

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“…1c. 21,22 According to the chemical compositions of ADC12 listed in Table I, it is expected that among the IMCs, eutectic Si and θ phase make up a significant portion of the microstructure.…”

Section: Resultsmentioning

confidence: 99%

Effect of L-Cysteine on Micro-Galvanic Corrosion of ADC12 Aluminum Alloy in a Low-Conductivity Coolant for Electric Vehicles

Lee,

Kim,

Kim

et al. 2024

J. Electrochem. Soc.

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L-cysteine as a corrosion inhibitor for ADC12 aluminum alloy in a modified coolant solution was investigated. Results reveal its effectiveness as a cathodic inhibitor, suppressing the oxygen reduction reaction. Immersion tests show efficient inhibition of localized corrosion at an optimized L-cysteine concentration of 1.0 mM. A favorable L-cysteine adsorption on θ-Al2Cu is confirmed, enhancing hydrophobicity, and leading to corrosion inhibition. This study proposes a tentative corrosion inhibition mechanism.

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Section: Resultsmentioning

confidence: 99%

Effect of L-Cysteine on Micro-Galvanic Corrosion of ADC12 Aluminum Alloy in a Low-Conductivity Coolant for Electric Vehicles

Lee,

Kim,

Kim

et al. 2024

J. Electrochem. Soc.

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“…The second precipitation of Mg 2 Si after the aging process enhances the mechanical properties. This transformation of the Si morphology of the semisolid alloy after being subjected to heat treatment (heat-treated semisolid samples) into a spherical shape results in better ductility and higher fatigue strength of the semisolid casting alloy [ 22 , 23 , 24 ] as well as improved corrosion resistance [ 25 , 26 ]. The large eutectic Si particles in the as-cast alloy retain their lamellar-like shape in the final microstructure in semisolid casting after the heat treatment process [ 27 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Semisolid and Heat Treatment Process on Microstructural Refinement of Al–7Si Alloy

et al. 2023

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Improving the engineering properties of Al–7Si cast alloys (300 series) provides an attractive alternative to automotive and aircraft engine industries. The solubility limit of silicon (Si) in Al contributes to the precipitation of flake-shaped Si particles with sharp edges, which function as a stress riser and promote crack propagation during the eutectic phase while also weakening the protective layer’s durability. In this study, the impact of microstructure refinement of Al–7Si alloys by using cooling slope, thixoforming and the T6 heat treatment process on hardness and corrosion resistance behavior was investigated. Results showed that the microstructures of the as-cast alloy had a very coarse dendritic shape, whereas the dendritic transferred to the globular α-Al phase, and the Si particles were replaced into a lamellar- or acicular-like shape after the cooling slope and thixoforming process, respectively. The as-cast, cooling slope and thixoformed samples were subjected to the T6 heat treatment process, which enhanced the hardness to 79, 99 and 104 HV, respectively, due to Si particle refinement. The potentiodynamic test revealed that the corrosion rate dropped to 0.00790 and 0.00736 mmpy−1 in the heat-treated cooling slope and thixoforming samples. This finding can be attributed to the substantially refined Si particles and reduced eutectic phase area due to the smaller cathodic to anodic area ratio.

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Research on pressure loss and filling ability of semi-solid rheological behavior in squeeze casting

Wang

2022

Int J Adv Manuf Technol

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The filling ability of alloy fluid under pressure is of great significance to improve the dimensional integrity and mechanical properties of thin-walled and slender rods formed by squeeze casting. Insight into the rheological behavior of squeeze casting is beneficial to improve the formability of complex structural parts by optimizing the squeeze casting process. In this work, the Archimedes spiral sample prepared by indirect squeeze casting was applied to investigate the variation of filling length with squeeze pressure and filling speed during the rheological process in squeeze casting. According to the temperature distribution characteristic during the alloy melt filling process, the alloy fluid state was discussed and the spiral filling was confirmed as a semi-solid rheological behavior. The calculation models of pressure loss and filling length were established respectively based on steady-state rheological behavior. Pressure loss is mainly affected by the melt viscosity which is determined by temperature distribution and filling speed of alloy melt in the channel. According to the agreement between the theoretical calculations and the experimental results, the pressure loss and filling length models have been confirmed to be used to quantitatively characterize the filling ability of the aluminum alloy melt in the squeeze casting process.

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Microstructural evolution, dislocation density and tensile properties of Al–6.5Si–2.1Cu–0.35Mg alloy produced by different casting processes

Cited by 23 publications

References 51 publications

Effect of L-Cysteine on Micro-Galvanic Corrosion of ADC12 Aluminum Alloy in a Low-Conductivity Coolant for Electric Vehicles

Effect of L-Cysteine on Micro-Galvanic Corrosion of ADC12 Aluminum Alloy in a Low-Conductivity Coolant for Electric Vehicles

Effect of Semisolid and Heat Treatment Process on Microstructural Refinement of Al–7Si Alloy

Research on pressure loss and filling ability of semi-solid rheological behavior in squeeze casting

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