Studies on Al-Si based hybrid aluminium metal matrix nanocomposites

Dinesh Kumar, P.K.; Darius Gnanaraj, S.

doi:10.1016/j.mtcomm.2024.108132

Materials Today Communications

2024

DOI: 10.1016/j.mtcomm.2024.108132

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Studies on Al-Si based hybrid aluminium metal matrix nanocomposites

P.K. Dinesh Kumar,

S. Darius Gnanaraj

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2024

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Cited by 3 publications

References 29 publications

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Characterization of Al-Si Alloy Reinforced with B4C and TiO2 Nanoparticles

Dinesh Kumar,

Darius Gnanaraj

2024

Silicon

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Characterization of Al-Si Alloy Reinforced with B4C and TiO2 Nanoparticles

Dinesh Kumar,

Darius Gnanaraj

2024

Silicon

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Effect of filler paste’s mixing ratio on the properties of Al-64430 dip-brazed joints

Garg,

Murtaza

2024

Weld World

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In Situ Prediction of Microstructure and Mechanical Properties in Laser-Remelted Al-Si Alloys: Towards Enhanced Additive Manufacturing

Kayitmazbatir,

Banu

2024

Materials

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Laser surface remelting of aluminum alloys has emerged as a promising technique to enhance mechanical properties through refined microstructures. This process involves rapid cooling rates ranging from 103 to 108 °C/s, which increase solid solubility within aluminum alloys, shifting their eutectic composition to a larger value of silicon content. Consequently, the resulting microstructure combines a strengthened aluminum matrix with silicon fibers. This study focuses on the laser scanning of Al-Si aluminum alloy to reduce the size of aluminum matrix spacings and transform fibrous silicon particles from micrometer to nanometer dimensions. Analysis revealed that the eutectic structure contained 17.55% silicon by weight, surpassing the equilibrium eutectic composition of 12.6% silicon. Microstructure dimensions within the molten zones, termed ‘melt pools’, were extensively examined using Scanning Electron Microscopy (SEM) at intervals of approximately 20 μm from the surface. A notable increase in hardness, exceeding 50% compared to the base plate, was observed in the melt pool regions. Thus, it is exemplified that laser surface remelting introduces a novel strengthening mechanism in the alloy. Moreover, this study develops an in situ method for predicting melt pool properties and dimensions. A predictive model is proposed, correlating energy density and spectral signals emitted during laser remelting with mechanical properties and melt pool dimensions. This method significantly reduces characterization time from days to seconds, offering a streamlined approach for future studies in additive manufacturing.

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Studies on Al-Si based hybrid aluminium metal matrix nanocomposites

Cited by 3 publications

References 29 publications

Characterization of Al-Si Alloy Reinforced with B4C and TiO2 Nanoparticles

Characterization of Al-Si Alloy Reinforced with B4C and TiO2 Nanoparticles

Effect of filler paste’s mixing ratio on the properties of Al-64430 dip-brazed joints

In Situ Prediction of Microstructure and Mechanical Properties in Laser-Remelted Al-Si Alloys: Towards Enhanced Additive Manufacturing

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