Mechanical Properties of Aluminium-Graphene Composite Synthesized by Powder Metallurgy and Hot Extrusion

Kumar, Sanjeet; Keshavamurthy, R.; Haseebuddin, M. R.; Koppad, Praveennath G.

doi:10.1007/s12666-017-1070-5

Cited by 63 publications

(7 citation statements)

References 20 publications

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“…It is reported that graphene inclusion in the Al matrix leads to a decrease in ductility. This is verified by decreasing of ductile dimples with the addition of graphene [42]. When compared to the fracture surface of composite materials (25°C), larger dimples are observed for the composites at temperatures of 150°C and 250°C.…”

Section: Resultsmentioning

confidence: 81%

Improved elevated temperature mechanical properties of graphene-reinforced pure aluminium matrix composites

Turan

Aydın

2020

Materials Science and Technology

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In this study, graphene nanoplatelets (0.25 and 0.5 wt-%) reinforced aluminium matrix composites were synthesised. Microstructures of composites were investigated by X-ray diffraction, scanning electron microscope and transmission electron microscope. Hardness was measured according to the Vickers test method. Tensile tests were performed at both room (25°C) and elevated temperatures (150°C and 250°C). Results showed that hardness was improved with direct addition of graphene. Microstructure of composites was free of macro defects. Yield and tensile strength behaviours of pure aluminium were increased with the addition of graphene especially at room temperature. Graphene-reinforced samples have higher compressive residual stress. From the outer surface to inner surface, transition from compressive to tensile residual stress was observed for samples.

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Section: Resultsmentioning

confidence: 81%

Improved elevated temperature mechanical properties of graphene-reinforced pure aluminium matrix composites

Turan

Aydın

2020

Materials Science and Technology

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“…As a rule, efforts are made to improve the uniformity of the distribution of hardening particles by extrusion, rolling, equal-channel angular extrusion, high-pressure torsion or accumulative roll bonding. 3–5,33–36…”

Section: Resultsmentioning

confidence: 99%

Effect of silicon carbide particles on the mechanical and plastic properties of the AlMg6/10% SiC metal matrix composite

Смирнов

Shveikin

Smirnova

et al. 2018

Journal of Composite Materials

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This work deals with studying the effect of reinforcing SiC particles on the mechanical and plastic properties of a metal matrix composite with a matrix of aluminum alloy AlMg6 (the 1560 aluminum alloy according to the Russian State Standard GOST 4784−97). We assess this effect using the results of mechanical tests at the microscale and macroscale levels. The paper analyzes the fracture mechanism at the microlevel under tensile and compressive stress conditions, as well as the type of contact between the composite constituents. The experimental results obtained for the metal matrix composite are compared with analogous experimental data for the AlMg6 alloy and a compacted material made from the AlMg6 alloy (a compacted powder without addition of SiC reinforcing particles). The studied compacted materials were not previously subjected to extrusion. The tests show a decisive influence of the reinforcing particles on the plastic and mechanical properties of the AlMg6/10% SiC metal matrix composite under compression and tension. For example, the addition of silicon carbide increased the initial yield stress of the compacted material by 26% under tensile tests, and the percentage elongation after fracture was increased up to 1.1%, while it amounted to 0.02% for the compacted material without addition of silicon carbide. Under compression, on the contrary, the addition of silicon carbide degraded plastic properties. As a result, the percentage compression before cracking was 28.4% and 57.9% for the compacted materials with and without addition of silicon carbide, respectively.

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“…Table 1 illustrates the addition of reinforcements to aluminium and its alloy resulted in improved properties (hardness, strength, and wear resistance) in extruded parts. The extrusion process ensures uniform dispersing of reinforced nanoparticles in the matrix and thereby results in enhanced properties with refined grain structure in aluminium metal matrix composites [23][24][25]. The application of hard reinforcement particles, i.e., carbides, resulted in extrusion die wear [26,27].…”

Section: Introductionmentioning

confidence: 99%

“…Due to the combined effect of the operating environment and bearing loads during their service, stress corrosion is always seen to have a fatal defect in structural materials (in particular Al 7XXX alloys) that causes aircraft accidents [53]. The extrusion process refines the grain structure due to increased plastic deformation as a result of fracture of reinforcement particles to finer sizes which stimulates dynamic recrystallization and nucleation [24,25,54]. The microstructural change influences on corrosion behaviour of the alloys.…”

Section: Introductionmentioning

confidence: 99%

Corrosion Behaviour of High-Strength Al 7005 Alloy and Its Composites Reinforced with Industrial Waste-Based Fly Ash and Glass Fibre: Comparison of Stir Cast and Extrusion Conditions

et al. 2021

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The stringent demand to develop lightweight materials with enhanced properties suitable for various engineering applications is the focus of this research work. Industrial wastes such as fly ash (FA) and S-glass-fibres (GF) were used as reinforcement materials for high-strength alloy, i.e., Al 7005. Stir casting routes were employed for fabricating the four samples, Al 7005, Al 7005 + 5% GF, Al 7005 + 6% FA and Al 7005 + 5% GF + 6% FA. The extrusion process with different extrusion ratios (ER: 5.32:1, and 2.66:1) was used to examine the properties of all four samples. Extruded samples with ER: 5.32: 1 resulted in equiaxed grains with refined structure compared to stir casting parts. The effect of the extrusion process and the addition of reinforcements (GF and FA) on the gravimetric, electrochemical, and electrochemical impedance corrosion behaviour of Al 7005 composites in 1M HCl (Hydrochloric acid) solution were investigated. The results of all three corrosion methods showed that Al 7005 + 6% FA exhibited higher corrosion resistance. Corrosion rate of Al 7005, Al 7005 + 5% GF, Al 7005 + 6% FA and Al 7005 + 5% GF + 6% FA is found equal to 3.25, 2.41, 0.34, and 0.76 mpy, respectively. The FA particles remain inert and act as a physical barrier with corrosive media during the corrosion test. GF undergoes fibre degradation or disrupts the continuity of the glass network as a result of fibre leaching, which increases the corrosion rate in the sample. The gravimetric study showed that the corrosion rates decreased with an increase in extrusion ratio, which might be due to corrosion passivation increases and improved properties. The scanning electron microscopy reveals that corrosion fits, flakes and micro-cracks were observed more in the as-cast composites than that of extrusion composites, promoting the corrosion rate.

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Mechanical Properties of Aluminium-Graphene Composite Synthesized by Powder Metallurgy and Hot Extrusion

Cited by 63 publications

References 20 publications

Improved elevated temperature mechanical properties of graphene-reinforced pure aluminium matrix composites

Improved elevated temperature mechanical properties of graphene-reinforced pure aluminium matrix composites

Effect of silicon carbide particles on the mechanical and plastic properties of the AlMg6/10% SiC metal matrix composite

Corrosion Behaviour of High-Strength Al 7005 Alloy and Its Composites Reinforced with Industrial Waste-Based Fly Ash and Glass Fibre: Comparison of Stir Cast and Extrusion Conditions

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