Effect of particle shape and size distribution on the dissolution behavior of Al2Cu particles during homogenization in aluminum casting alloy Al-Si-Cu-Mg

Sadeghi, Ida; Wells, Mary A.; Esmaeili, Shahrzad

doi:10.1016/j.jmatprotec.2017.08.042

Cited by 33 publications

(14 citation statements)

References 31 publications

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“…The matrix Al-12Si-Cu-Mg is a typical heat-treatable aluminum alloy, in which the main precipitates are Mg 2 Si, Al 2 Cu, Al 2 CuMg, Al 5 Cu 2 Mg 8 Si 6 , and Al(Si, Fe)Mn phases [ 22 , 23 ]. Figure 5 shows the TEM images and corresponding selected-area electron diffraction (SAED) patterns of SiCp/Al-Si composites without CeO 2 after heat treatment.…”

Section: Resultsmentioning

confidence: 99%

Effect of CeO2 Content on Microstructure and Properties of SiCp/Al-Si Composites Prepared by Powder Metallurgy

et al. 2021

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The effect of CeO2 content on the microstructure and properties of SiCp/Al-Si composites prepared by powder metallurgy was studied, and the mechanism of CeO2 in composites was deeply analyzed. The results show that the addition of the appropriate amount of CeO2 can refine the Si particles and improve the tensile properties of the SiCp/Al-Si composites. As the CeO2 content increases from 0 to 0.4 vol%, the particle size of the Si phase shows a tendency to decrease first and then increase, while the tensile strength, yield strength, and elongation of the composites show a trend of first increasing and then decreasing. When the CeO2 content is 0.2 vol%, the refining effect of CeO2 and the tensile properties of composites are the best. The fracture mode of SiCp/Al-Si composites with a rare earth addition is a mixed fracture. There are three main mechanisms for CeO2 in SiCp/Al-Si composites. One is when CeO2 serves as the nucleation substrate of Si phase to refine Si particles. The second is when CeO2 reacts with the alloying elements in the aluminum matrix to form a new phase, CeCu2Si2, which can not only play a role of dispersion strengthening, but also improve the bonding strength between Al matrix and Si particles. The third is the pinning effect of CeO2 and CeCu2Si2 particles on grain boundaries or phase boundaries to refine aluminum grains.

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Section: Resultsmentioning

confidence: 99%

Effect of CeO2 Content on Microstructure and Properties of SiCp/Al-Si Composites Prepared by Powder Metallurgy

et al. 2021

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“…about 58% of Al2Cu phase was dissolved. As shown in Figure 9, the dissolution process speed is higher during the first 2 h 30 min solution treatment, this is because particles that are smaller than the average particle size take short to dissolve [46], it will be discussed in details in the following part.…”

Section: Al2cu Phasementioning

confidence: 99%

“…Dissolution kinetics of Al2Cu phases in Al-Si-Cu alloy is widely studied in literature [46][47][48][49]. It depends on several factors, such as temperature, diffusion distance (i.e.…”

Section: Al2cu Phasementioning

confidence: 99%

Effects of duration of solution heat treatment on the evolution of 3D microstructure in AlSi7Cu3 alloy: A quantitative X-ray tomography study

Limodin

Tandjaoui

et al. 2021

Materials Characterization

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The evolution of the microstructure of an AlSi7Cu3 alloy is investigated by optical microscopy and X-ray tomography in as-cast condition and with subsequent solution treatments for 2 h 30 min and 50 h at 495 °C, respectively. The analyzed microstructure contains pores and hard inclusions, i.e. eutectic Si, iron-intermetallics, and Al2Cu phases. 2D microscopic surface examination was performed to reveal the characteristics of eutectic Si phase while 3D characterization by X-ray tomography (Lab-CT) was performed for the pores, iron-intermetallics, and Al2Cu phases. The 3D quantitative characterization can provide new insight into the microstructures amount, size and morphology change mechanisms during heat treatment. The Al2Cu phase, which presents a 3D interconnected structure in the as-cast condition, undergoes significant morphological changes during the solution heat treatment. The incipient melting of Al2Cu phase was evidenced after 50 h of solution treatment at 495°C, which leads to the formation of small pores (<60µm). Statistical analyses of the Al2Cu particle distribution, their size and their local mean curvatures describe the disintegration of the interconnected network structure followed by the dissolving of the disconnected particles. The eutectic Si undergoes fragmentation, spheroidization, and coarsening during the solution treatment.

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“…e well-known solid Copper plays an important role in strengthening aluminum aircraft alloys such as AA2024-T6 due to the precipitation strengthening phenomena occurred during solution and artificial aging. e amount, distribution, and size of the precipitated phase play an important role in the strengthening rate, depending largely on the composition and processing route of the alloys [14], affecting the mechanical properties of the alloy. Hence, it is expected a negative effect on the mechanical performance of the AA2024 alloy due to the chemical affinity between Cu and Ce, which form phases that alter the kinetics of precipitation of AlCuX solutes.…”

Section: Microstructural Characterization Of Bulk Compositesmentioning

confidence: 99%

Microstructural Changes and Mechanical Response of Aluminum-Based Composites Prepared with Dispersed CeO₂ Nanoparticles

Baldenebro-López

Pérez-Bustamante

Estrada-Guel

et al. 2019

Advances in Materials Science and Engineering

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The effect of CeO2 nanoparticles on the microstructure of two different metal matrixes, AA2024 aluminum alloy and pure aluminum, were studied. The aluminum-based composites were synthesized by mechanical milling and subsequently sintering at 550°C under an argon atmosphere. The microstructural evolution of consolidated composites was evaluated by scanning electron microscopy, transmission electron microscopy, and X-ray diffraction. The experimental results revealed that the addition of CeO2 nanoparticles in the AA2024 alloy produced a dispersed needle-like Ce-Cu-rich phase that reduces the hardness of samples after sintering. On the contrary, the dispersion of CeO2 in pure aluminum shows significant improvement of hardness in comparison with the reinforced and unreinforced AA2024 aluminum alloy. During the sintering, the CeO2 nanoparticles show higher chemical stability in the aluminum matrix in comparison with the AA2024 matrix.

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Effect of particle shape and size distribution on the dissolution behavior of Al2Cu particles during homogenization in aluminum casting alloy Al-Si-Cu-Mg

Cited by 33 publications

References 31 publications

Effect of CeO2 Content on Microstructure and Properties of SiCp/Al-Si Composites Prepared by Powder Metallurgy

Effect of CeO2 Content on Microstructure and Properties of SiCp/Al-Si Composites Prepared by Powder Metallurgy

Effects of duration of solution heat treatment on the evolution of 3D microstructure in AlSi7Cu3 alloy: A quantitative X-ray tomography study

Microstructural Changes and Mechanical Response of Aluminum-Based Composites Prepared with Dispersed CeO₂ Nanoparticles

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Effect of particle shape and size distribution on the dissolution behavior of Al2Cu particles during homogenization in aluminum casting alloy Al-Si-Cu-Mg

Cited by 33 publications

References 31 publications

Effect of CeO2 Content on Microstructure and Properties of SiCp/Al-Si Composites Prepared by Powder Metallurgy

Effect of CeO2 Content on Microstructure and Properties of SiCp/Al-Si Composites Prepared by Powder Metallurgy

Effects of duration of solution heat treatment on the evolution of 3D microstructure in AlSi7Cu3 alloy: A quantitative X-ray tomography study

Microstructural Changes and Mechanical Response of Aluminum-Based Composites Prepared with Dispersed CeO2 Nanoparticles

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Microstructural Changes and Mechanical Response of Aluminum-Based Composites Prepared with Dispersed CeO₂ Nanoparticles