Fabrication of functionally graded few-layered graphene reinforced Al-4.5Cu alloy by powder metallurgy

Borand, Gökçe; Uzunsoy, Deniz

doi:10.1016/j.jallcom.2022.166348

Cited by 15 publications

(5 citation statements)

References 94 publications

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“…On the other hand, the formation of the compound Al 4 C 3 in graphene-reinforced aluminium composites has been reported in several studies (Borand & Uzunsoy 2022;Han et al 2020;Lin et al 2023). Borand and Uzunsoy (2022) detect carbide phase formation in the composite produced by powder metallurgy in XRD and identify that interfacial phase of Al 4 C 3 can provide good load transfer between aluminium matrix and graphene which hinders the movement of dislocation.…”

Section: Resultsmentioning

confidence: 93%

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: 93%

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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“…Uzunsoy [24] Powder metallurgy was used to create a functionally graded graphenereinforced Al-4.5Cu alloy with variable weight percentages of fewlayered graphene (FLG) and sintering at 570 °C and 590 °C for 3 hours, following a six-layer FGM design.…”

Section: 5cu Alloy By Powder Metallurgy By Borand Andmentioning

confidence: 99%

Fabrication of Functionally Graded Materials through Severe Plastic Deformation of Powders: Process, Significance, and Future Development

Cleophas,

Bayode,

Fredrick

et al. 2024

E3S Web Conf.

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Functionally graded materials (FGMs) are a remarkable invention in materials science and engineering, that offers unique properties useful in various applications. Having the ability to gradually change properties, like composition, microstructure, or mechanical properties of materials, gives FGMs unparalleled adaptability, making them suited for a wide range of high-strength applications. One of the novel methods of creating FGMs is to use severe plastic deformation (SPD) techniques on powdered materials. The SPD of powders involves a few critical steps; The process begins with selecting materials with varied compositions and phases then mixing the powders, cold compaction, SPD methods, and, if necessary, heat treatment. The process is completed with characterization and testing, to evaluate the microstructure and characteristics of the final FGM formed. FGMs will continue transforming materials engineering and pushing the boundaries of their applications in many engineering fields and industries since they exhibit attractive capabilities like improved efficiency, durability, and performance. Therefore, this article explores the process of fabricating FGMs by SPD and emphasizes its significance and future trends in FGM production.

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“…FGM manufacturing methods have evolved over the years, with numerous techniques now employed to create these gradient materials, including centrifugal casting, powder metallurgy, vapor deposition, thermal spray, and additive manufacturing techniques [12][13][14]. Centrifugal casting and powder metallurgy processes, in particular, have proven effective in the fabrication of FGMs with smooth variation in microstructures and/or compositions [15][16][17]. Centrifugal 2 of 25 casting is typically more desirable to FGM production because it produces pieces that are substantially larger than those generated by powder metallurgy [18,19].…”

Section: Introductionmentioning

confidence: 99%

Optimization and Characterization of Centrifugal-Cast Functionally Graded Al-SiC Composite Using Response Surface Methodology and Grey Relational Analysis

et al. 2023

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In this study, an optimization approach was employed to determine the optimal main parameters that improve the performance of functionally graded composites manufactured using a combination of stirring and horizontal centrifugal casting. Pure aluminum reinforced with silicon carbide particles was used as the material for the composites. The effects of key input parameters such as mold speed, pouring temperature, stirring speed, and radial distance were optimized using a combination of grey relational analysis and response surface methodology. The statistical significance of the predicted grey relational grade model was assessed through an analysis of variance to identify the appropriate main parameters. The results showed that radial distance had the greatest impact on the performance of the composites, followed by pouring temperature. The optimal combination of main parameters was determined to be a mold speed of 1000 rpm, a pouring temperature of 750 °C, a stirring speed of 150 rpm, and a radial distance of 1 mm. Confirmation tests using these optimal values resulted in a 54.69% improvement in the grey relational grade.

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Fabrication of functionally graded few-layered graphene reinforced Al-4.5Cu alloy by powder metallurgy

Cited by 15 publications

References 94 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

Fabrication of Functionally Graded Materials through Severe Plastic Deformation of Powders: Process, Significance, and Future Development

Optimization and Characterization of Centrifugal-Cast Functionally Graded Al-SiC Composite Using Response Surface Methodology and Grey Relational Analysis

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