Laser powder bed fusion of AlSi10Mg-based composites with graphene and nanodiamond additions

Spierings, Adriaan B.; Ozherelkov, Dmitriy Yu.; Kneubühler, Fabian; Еремин, С. А.; Pelevin, Ivan A.; Nalivaiko, Anton Yu.; Петров, Е. А.; Gromov, A. A.; Wegener, Konrad

doi:10.1016/j.jallcom.2023.169421

Cited by 12 publications

(5 citation statements)

References 38 publications

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“…Thus, it is possible Al 4 C 3 is formed during the casting process. The presence of carbide phase can reduce the surface tension carbon and aluminium thus enhance the wettability between carbon and aluminium and improving the hardness of the composite (Spierings et al 2023). Moreover, the small existence of Al 4 C 3 usually contribute a pinning effect on the boundary of 𝛼-Al and inhibits grain development and prevents the movement at the grain boundary (Yehia, Nyanor & Daoush 2022).…”

Section: Resultsmentioning

confidence: 99%

Effect of Short Heat Treatments on the Microstructural Evolution and Hardness of Thixoformed Graphene Reinforced Aluminium Composites

Wakhi Anuar,

Omar,

Salleh

et al. 2024

JSM

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Aluminium metal matrix composites are increasingly being used in numerous industries due to their lightweight nature and high strength. The incorporation of graphene into aluminium metal matrix composites has garnered significant interest owing to graphene's capacity to enhance numerous properties concurrently. Hence, this study aimed to fabricate a 0.3 wt.% graphene nanoplatelets reinforced A356 alloy (GNP-A356) composite through stir casting followed by thixoforming and short T6 heat treatment processes. It also evaluated the microstructure and mechanical properties of GNP-A356 after the thixoforming process and short T6 heat treatment. The microstructure of alloy and composite was confirmed by optical microstructure, field emission scanning electron microscopy images, and X-ray diffraction. Microstructure investigations demonstrate the impact of the stirring process on the structural transformation of the 𝛼-Al phase from the dendritic into a rosette-like and globular-like structure. The result also indicated that there was a transformation of eutectic silicon from the shape of a needle-like to spheroid structure after a short heat treatment, showing the efficiency of T6 heat treatment with a shorter time of solution treatment and ageing. Moreover, the increase in relative density and addition of reinforcement led to a significant increment in hardness. The result shows the hardness improved by 35.77% and 77.8% for as-cast and heat-treated composites, respectively, compared to A356 alloy.

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Section: Resultsmentioning

confidence: 99%

Effect of Short Heat Treatments on the Microstructural Evolution and Hardness of Thixoformed Graphene Reinforced Aluminium Composites

Wakhi Anuar,

Omar,

Salleh

et al. 2024

JSM

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“…The study has revealed that the coarsening of Si networks, the extent of porosity, and the formation of microcracks during solidification are notably influenced by the dimensions and shapes of the powders. [23,24] According to previous reports, modifying the beam offset, LP, hatch distance, and scanning speed can significantly impact the ultimate surface roughness of the samples. [15,25] The process parameters were adjusted and subsequently reported, leading to a comparatively lower level of porosity in the manufactured parts when compared to the existing literature on LPBF-AlSi10Mg.…”

Section: Doi: 101002/adem202301784mentioning

confidence: 99%

Investigating the Microstructural and Mechanical Characteristics of Laser Additive‐Manufactured AlSi10Mg Specimens Through Experimental and Phase‐Field Modeling Approaches

Panda,

Sahoo,

Kumar

et al. 2024

Adv Eng Mater

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Metal‐based additive manufacturing can make complicated parts that are complex or expensive to cast and process. Rapid cooling rates increase L‐PBF’s mechanical properties during manufacturing. The objective of this study is to examine the impact of process parameters in the L‐PBF technique on the characteristics of microstructure and mechanical properties, specifically, on the nano‐hardness influenced by Si segregation. The microstructures of the produced specimens were examined using FESEM and the analysis identified the existence of bimodal equiaxed α‐Al grains, accompanied by Si phases located within their grain boundaries. In addition, the solidified sample exhibited the segregation of secondary precipitates, particularly , which resulted in enhanced mechanical properties. Both cellular walls and Si precipitates impede the motion and generation of dislocations, thereby influencing the overall behavior of dislocations. The examination of segregation at the top layer was conducted in a comprehensive manner, subsequently employing EDS for analysis. The presence of , , and other phases in all samples was confirmed through XRD. The as‐built samples’ residual stress under different process conditions was also investigated. In addition, a comparison was made between the obtained microstructure and a phase field model that was developed in order to forecast the evolution of the microstructure.This article is protected by copyright. All rights reserved.

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“…This strategy effectively mitigates the aforementioned shortcomings associated with monolithic aluminum alloys. Extensive research has been conducted to explore the impacts of diverse reinforced particles, such as oxides [55][56][57], carbides [58][59][60][61], nitrides [62][63][64], borides [65][66][67], and various allotropes of carbon [68][69][70], on the microstructure and mechanical properties of AlSi10Mg composites fabricated through an L-PBF approach. The findings from these studies have demonstrated promising outcomes, indicating significant enhancements in the resulting composites' microstructural characteristics and mechanical properties.…”

Section: Enhancing Performance Through Composite Reinforcementsmentioning

confidence: 99%

Advancements in Laser Powder Bed Fusion of Carbon Nanotubes-Reinforced AlSi10Mg Alloy: A Comprehensive Analysis of Microstructure Evolution, Properties, and Future Prospects

Abedi,

Moskovskikh,

Nepapushev

et al. 2023

Metals

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Laser powder bed fusion (L-PBF) stands out as a promising approach within the realm of additive manufacturing, particularly for the synthesis of CNT-AlSi10Mg nanocomposites. This review delves into a thorough exploration of the transformation in microstructure, the impact of processing variables, and the physico-mechanical characteristics of CNT-AlSi10Mg nanocomposites crafted via the L-PBF technique. Moreover, it consolidates a substantial corpus of recent research, proffering invaluable insights into optimizing L-PBF parameters to attain the desired microstructures and enhanced properties. The review centers its attention on pivotal facets, including the dispersion and distribution of CNTs, the formation of porosity, and their subsequent influence on wear resistance, electrical and thermal conductivity, tensile strength, thermal expansion, and hardness. In line with a logical progression, this review paper endeavors to illuminate the chemical composition, traits, and phase configuration of AlSi10Mg-based parts fabricated via L-PBF, juxtaposing them with their conventionally manufactured counterparts. Emphasis has been placed on elucidating the connection between the microstructural evolution of these nanocomposites and the resultant physico-mechanical properties. Quantitative data culled from the literature indicate that L-PBF-produced parts exhibit a microhardness of 151 HV, a relative density of 99.7%, an ultimate tensile strength of 70×103 mm3N.m, and a tensile strength of 756 MPa.

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Laser powder bed fusion of AlSi10Mg-based composites with graphene and nanodiamond additions

Cited by 12 publications

References 38 publications

Effect of Short Heat Treatments on the Microstructural Evolution and Hardness of Thixoformed Graphene Reinforced Aluminium Composites

Effect of Short Heat Treatments on the Microstructural Evolution and Hardness of Thixoformed Graphene Reinforced Aluminium Composites

Investigating the Microstructural and Mechanical Characteristics of Laser Additive‐Manufactured AlSi10Mg Specimens Through Experimental and Phase‐Field Modeling Approaches

Advancements in Laser Powder Bed Fusion of Carbon Nanotubes-Reinforced AlSi10Mg Alloy: A Comprehensive Analysis of Microstructure Evolution, Properties, and Future Prospects

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