Microstructural and Mechanical Behavior of Al6061-Graphene Oxide Nanocomposites

Hedayatian, Mahdi; Vahedi, Khodadad; Nezamabadi, A. R.; Momeni, Amir

doi:10.1007/s12540-019-00361-9

Cited by 25 publications

(2 citation statements)

References 53 publications

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“…The mechanical properties of LPBFed AlSi10Mg in all conditions have been summarized in both Figure 10 and Table 2, where the toughness was calculated by the integration of tensile stress and strain ($sd«, the area below the tensile stress-strain curves), which is widely used to represent the energy required for tensile fracture (Hedayatian et al, 2020(Hedayatian et al, , 2019Lava Kumar et al, 2022). It can be seen that although the as-built sample exhibits the highest tensile strength, its ductility and toughness are relatively low.…”

Section: Tensile Propertiesmentioning

confidence: 99%

Improving the mechanical properties of laser powder bed fused AlSi10Mg alloys by eliminating the inevitable micro-voids via hot forging

Wan,

Chen,

Shen

et al. 2024

RPJ

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Purpose The metallic alloys and their components fabricated via laser powder bed fusion (LPBF) suffer from the microvoids formed inevitably due to the extreme solidification rate during fabrication, which are impossible to be removed by heat treatment. This paper aims to remove those microvoids in as-built AlSi10Mg alloys by hot forging and enhance their mechanical properties. Design/methodology/approach AlSi10Mg samples were built using prealloyed powder with a set of optimized LPBF parameters, viz. 350 W of laser power, 1,170 mm/s of scan speed, 50 µm of layer thickness and 0.24 mm of hatch spacing. As-built samples were preheated to 430°C followed by immediate pressing with two different thickness reductions of 10% and 35%. The effect of hot forging on the microstructure was analyzed by means of X-ray diffraction, scanning electron microscopy, electron backscattered diffraction and transmission electron microscopy. Tensile tests were performed to reveal the effect of hot forging on the mechanical properties. Findings By using hot forging, the large number of microvoids in both as-built and post heat-treated samples were mostly healed. Moreover, the Si particles were finer in forged condition (∼150 nm) compared with those in heat-treated condition (∼300 nm). Tensile tests showed that compared with heat treatment, the hot forging process could noticeably increase tensile strength at no expense of ductility. Consequently, the toughness (integration of tensile stress and strain) of forged alloy increased by ∼86% and ∼24% compared with as-built and heat-treated alloys, respectively. Originality/value Hot forging can effectively remove the inevitable microvoids in metals fabricated via LPBF, which is beneficial to the mechanical properties. These findings are inspiring for the evolution of the LPBF technique to eliminate the microvoids and boost the mechanical properties of metals fabricated via LPBF.

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Section: Tensile Propertiesmentioning

confidence: 99%

Improving the mechanical properties of laser powder bed fused AlSi10Mg alloys by eliminating the inevitable micro-voids via hot forging

Wan,

Chen,

Shen

et al. 2024

RPJ

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“…Abu-Warda et al [16] reported that the addition of nano-TiB 2 did not reduce the corrosion resistance or susceptibility to pitting corrosion at the interfacial region. Recently, graphene oxide has received much attention among the nanoreinforcements due to its unique structure and outstanding mechanical properties and the presence of oxygen in graphene oxide to enhance the interfacial bond between the matrix and the reinforcement [17]. Furthermore, graphene oxide is mostly used as a coating material because of its chemical inertness and impermeability characteristics [18].…”

Section: Introductionmentioning

confidence: 99%

Corrosion and Hardness Behaviour of Al/GO Nanocomposites Processed by the Ultrasonic Gravitational Stir Casting Method

Narayanan

Sozhamannan

Hemalatha

et al. 2021

International Journal of Corrosion

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The objective of this work is to evaluate the corrosion behaviour of nanographene oxide reinforced aluminium (Al/GO) metal matrix composites with different immersion time periods using the immersion corrosion technique. The Al/GO composites were fabricated by the ultrasonic gravitational stir casting process. The corrosions of Al/GO were evaluated using a scanning electron microscope. The experimental results revealed that the corrosion rate decreased and weight losses increased with increasing immersion time periods. The nonimmersed Al/GO composites exhibited higher microhardness values compared to the immersed Al/GO composites.

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Role of graphene oxide (GO) for enhancing the solidification rate and mechanical properties of Sn–6.5Zn–0.4 wt% Cu Pb-free solder alloy

Fouda

Eid

2021

J Mater Sci: Mater Electron

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Microstructural and Mechanical Behavior of Al6061-Graphene Oxide Nanocomposites

Cited by 25 publications

References 53 publications

Improving the mechanical properties of laser powder bed fused AlSi10Mg alloys by eliminating the inevitable micro-voids via hot forging

Improving the mechanical properties of laser powder bed fused AlSi10Mg alloys by eliminating the inevitable micro-voids via hot forging

Corrosion and Hardness Behaviour of Al/GO Nanocomposites Processed by the Ultrasonic Gravitational Stir Casting Method

Role of graphene oxide (GO) for enhancing the solidification rate and mechanical properties of Sn–6.5Zn–0.4 wt% Cu Pb-free solder alloy

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