Investigation of microstructural, mechanical and corrosion properties of graphene nanoplatelets reinforced Al matrix composites

Akçamlı, Nazlı; Küçükelyas, Burak; Kaykılarlı, Cantekin; Uzunsoy, Deniz

doi:10.1088/2053-1591/ab511f

Cited by 26 publications

(13 citation statements)

References 34 publications

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“…Previous research shows that the milling time and Gr addition have a direct effect on the crystallite refinement [32]. In particular, the effect of the milling time on the phase identification was investigated, and it had been reported that continuous impact energy in the milling bowl causes more lattice defects in powder as a consequence of severe cold-working and plastic deformation.…”

Section: Discussionmentioning

confidence: 99%

Graphene Nanoplatelets Reinforced Al-Cu-Mg Composite Fabricated using Laser Powder Bed Fusion: Microstructure, Mechanical Properties, and Wear Behaviour

Pekok

Setchi²,

Ryan³

et al. 2023

Preprint

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Aluminium-based metal matrix composites reinforced with Graphene (Gr) and its derivatives have been reported as promising composites due to their superior properties such as strength, damage tolerance, fatigue resistance, and density. However, the crack and porosity susceptibility of Aluminium 2024 Alloy (AA2024) with added Gr when fabricated using additive manufacturing techniques is not sufficiently well understood. The present work addresses this knowledge gap by focusing on the effect of Graphene Nanoplatelets (GNPs) and scanning speed on the AA2024 composites’ wear performance, microstructural and mechanical properties of fabricated specimens using Laser Powder Bed Fusion (LPBF). The experimental findings demonstrate that the Gr presence in the composite up to 0.5% improves its crystallite size and microhardness by up to 37.6% and 45%, respectively; however, it increases the porosity and crack formation due to the high laser power requirement. Moreover, the composites’ macroscale scratch and nanoscale wear performances showed improvements by up to 50% and 56% with higher Gr concentration (0.5%), suggesting that Gr is distributed uniformly in the structure. The improved understanding of the relationship between microstructure and mechanical characteristics of the GNPs/Al2024 composites fabricated using LPBF in terms of cracking and porosity formation is another significant contribution of this work.

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Section: Discussionmentioning

confidence: 99%

Graphene Nanoplatelets Reinforced Al-Cu-Mg Composite Fabricated using Laser Powder Bed Fusion: Microstructure, Mechanical Properties, and Wear Behaviour

Pekok

Setchi²,

Ryan³

et al. 2023

Preprint

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“…Compared with the tobacco leaf sample, the dispersion degree and median particle size of tobacco stem were significantly reduced and the peak area of 0-5 µm increased after 4 h ball grinding. This demonstrated that the effective milling time may vary depending on the materials and the initial particle sizes [45]. When the ball grinding time of plant samples was 6 and 8 h, the two distribution curves were almost identical, indicating that the particle size range of samples stabilized after ball grinding treatment for 6 h. To explore the influence of particle size on the quality of two-dimensional NMR spectra, samples with different transmittance were dissolved into DMSO-d 6 / HMPA-d 18 and then analyzed by 2D HSQC NMR.…”

Section: Size Optimizationmentioning

confidence: 99%

Structural characteristics of plant cell wall elucidated by solution-state 2D NMR spectroscopy with an optimized procedure

Wang

Cai

et al. 2020

Green Processing and Synthesis

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A method was developed for rapid qualitative determination of lignocellulose in the tobacco cell wall by utilizing 2D heteronuclear single quantum coherence NMR spectra (2D HSQC NMR). Traditional methods for analyzing the structure of lignocellulose involve many steps of separation and extraction, which is labor-intensive. In this work, the whole cell wall was milled and dissolved in deuterium solvent. The solvent dimethylsulfoxide (DMSO-d6) containing hexamethylphosphoramide (HMPA-d18) enhanced swelling of the sample and gave high-resolution spectra. The tobacco samples are ball milled at different ball milling times, and the state of the particles is observed through an electron microscope, and then the probability of the particles being less than 5 µm is counted. Through the comparison of the abundance and integration of the peak signals in the spectra under different transmittances, it was determined that when the milling time was 6 h, the quality of the NMR spectra was the best. The optimum conditions of characterizing tobacco structure were DMSO-d6/HMPA-d18 solution and 6 h milling time. Under these conditions, complete representation of the structure of lignocellulose and simplified process could be achieved.

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“…This milling method was initially used in the mechanical alloying (MA) technique, whose objective is the creation of metallic alloys starting from powders. In recent years, the milling process has been used to reuse metallic materials through mechanical milling (MM) [16][17][18][19] .…”

Section: Introductionmentioning

confidence: 99%

Analysis of Milling Efficiency of the Vanadis® 8 Tool Steel with Additions of Vanadium and Molybdenum Carbides

et al. 2021

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The Vanadis ® 8 is a tool steel used in the manufacture of dies, punches and tools. It has a high carbon content combined with chromium, molybdenum and vanadium, and presents good performance in its mechanical properties. Usually, its chips obtained by machining are sold to companies that use remelting. However, this technique is considered expensive and harmful to the environment. Therefore, this work aimed to analyze the efficiency of the addition of vanadium carbide (VC) and molybdenum carbide (Mo 2 C) in the high energy ball milling of the Vanadis ® 8 steel. Microstructural analysis were performed in the pure steel and with 3% of VC and Mo 2 C additions. The milling parameters used were: speed of 350 rpm, ball-to-powder weight ratio of 15:1 and times of 4, 8 and 12 hours. The results indicated that the Vanadis ® 8 steel milled with VC presented the best microstructural results in all of the conducted tests.

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Investigation of microstructural, mechanical and corrosion properties of graphene nanoplatelets reinforced Al matrix composites

Cited by 26 publications

References 34 publications

Graphene Nanoplatelets Reinforced Al-Cu-Mg Composite Fabricated using Laser Powder Bed Fusion: Microstructure, Mechanical Properties, and Wear Behaviour

Graphene Nanoplatelets Reinforced Al-Cu-Mg Composite Fabricated using Laser Powder Bed Fusion: Microstructure, Mechanical Properties, and Wear Behaviour

Structural characteristics of plant cell wall elucidated by solution-state 2D NMR spectroscopy with an optimized procedure

Analysis of Milling Efficiency of the Vanadis® 8 Tool Steel with Additions of Vanadium and Molybdenum Carbides

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