Strengthening mechanism of Al matrix composites reinforced by nickel-coated graphene: Insights from molecular dynamics simulation

Han, Rui; Song, H.Y.; Wang, J.Y.; Li, Yu Long

doi:10.1016/j.physb.2020.412620

Cited by 24 publications

(6 citation statements)

References 44 publications

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“…The simulated results showed that the mechanical properties of polyCu were sensitive to high strain rates (1 × 10 9 s −1 ∼5 × 10 10 s −1 ), but the properties did not change much at low strain rates (5 × 10 7 s −1 ∼1 × 10 9 s −1 ). In addition, MD simulations are also widely used in the calculations of polycrystalline graphene reinforced Al matrix composites [10] and other materials [11,12].…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Mechanical Properties of Polycrystalline Mg Using Molecular Dynamics Simulation

Liu¹

2022

Computer Modeling in Engineering &Amp; Sciences

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Magnesium (Mg) and its composites have been widely used in different fields, but the mechanical properties and deformation mechanisms of polycrystalline Mg (polyMg) at the atomic scale are poorly understood. In this paper, the effects of grain size, temperature, and strain rate on the tensile properties of polyMg are explored and discussed by the Molecular dynamics (MD) simulation method. The calculated results showed that there exists a critical grain size of 10 nm for the mechanical properties of polyMg. The flow stress decreases with the increase of grain size if the average grain size is larger than 10 nm, which shows the Hall-Petch effect, and the deformation mechanism of large grain-sized polyMg is mainly dominated by the movement of dislocations. When the average grain size is less than 10 nm, it shows the reverse Hall-Petch effect that the flow stress decreases with the decrease of grain size, and the deformation mode of polyMg with small grain-size is the movement and deformation of atoms at the grain boundary. Due to the more active motion of atoms as the system temperature increases, the material can easily reach the plastic stage under tensile loading, and the mechanical properties of polyMg decrease at high temperatures. The strain rate has a hardening effect on the properties of composite. Based on our calculated results, it can provide theoretical guidance for the applications of Mg metal and Mg matrix composites.

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Section: Introductionmentioning

confidence: 99%

Investigation on the Mechanical Properties of Polycrystalline Mg Using Molecular Dynamics Simulation

Liu¹

2022

Computer Modeling in Engineering &Amp; Sciences

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“…Aluminum is the most widely used alloys in industries due to its light weight, high strength and excellent thermal/electrical conductivity. Large amounts of researches are focused on the incorporation of graphene into Al matrix and many good results are obtained [18,96]. Concluding from dazzling literatures, the microstructural characteristics which are formed during fabrication of GNP-Al composites and contributing to the enhanced mechanical property mainly include: (i) Grain refinement as indicated in figures 7(a)-(b): the embedding of graphene into Al matrix often leads to grain refinement, which is due to hindering effect of graphene on the atomic diffusion and dislocation movement during thermal/ mechanical processing, hence contributing to the enhanced mechanical property.…”

Section: Gnp-al Compositesmentioning

confidence: 99%

Recent advances in 2D graphene reinforced metal matrix composites

Chen¹,

Zhou²

2021

Nanotechnology

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The unique combination of excellent mechanical and functional properties makes graphene an ideal component for high-performance ‘smart’ composites, which are sensitive to thermal, optical, electrical and mechanical excitations, hence being potential in application of a range of sensors. It has confirmed that the addition of graphene into metal matrix can significantly enhance the mechanical property and deliver surprising functional properties. Thus, graphene reinforced metal matrix composites (GMMCs) have long been regarded as potential prospects of nanotechnology applications. Recently, researchers mainly focused on: (i) solving the interfacial issues and realizing controllable alignment of graphene in metal matrix to achieve optimal performance; (ii) reasonable designing of the microstructures basing on usage requirement and then fabricating via efficient technique. Thus, it is necessary to figure out key roles of microstructure in fabrication process, mechanical and multi-functional properties. This review consists of four parts: (i) fabrication process. The fabrication processes are firstly divided into three kinds basing on the different bonding nature between graphene and metal matrix. (ii) Mechanical property. The microstructural characteristics of metal matrix accompanying by the incorporation of graphene and their vital effects on mechanical properties of GMMCs are systematically summarized. (iii) Functional property. The crucial effects of microstructure on electrical and thermal properties are summarized. (iv) Prospect applications and future challenges. Application and challenges basing on the research status are discussed to provide useful directions for future exploration in related fields. All these four parts are discussed with a focus on key role of microstructure characteristics, which is instructive for the microstructures design and fabrication process optimization during academic researches and potential commercial applications.

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“…Graphene is an emerging reinforcement material. Due to the unique two-dimensional structure of graphene, it has ultra-high thermal conductivity (up to 5300 W/(mK)) and excellent mechanical properties [ 6 , 7 ], and has been made a good selection for different industrial applications [ 8 , 9 , 10 ]. Graphene nanoplates (GNPs) are used as reinforcements and added to the pure copper metal matrix to prepare GNPs/Cu composites.…”

Section: Introductionmentioning

confidence: 99%

Microstructure Evolution of Graphene and the Corresponding Effect on the Mechanical/Electrical Properties of Graphene/Cu Composite during Rolling Treatment

Xiu

Zhan³

et al. 2022

Materials

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Rolling enables the directional alignment of the reinforcements in graphene/Cu composites while achieving uniform graphene dispersion and matrix grain refinement. This is expected to achieve a breakthrough in composite performance. In this paper, the process parameters of rolling are investigated, and the defects, thickness variations of graphene and property changes of the composite under different parameters are analyzed. High-temperature rolling is beneficial to avoid the damage of graphene during rolling, and the prepared composites have higher electrical conductivity. The properties of graphene were investigated. Low-temperature rolling is more favorable to the thinning and dispersion of graphene; meanwhile, the relative density of the composites is higher in the low-temperature rolling process. With the increase of rolling deformation, the graphene defects slightly increased and the number of layers decreased. In this paper, the defect states of graphene and the electrical conductivity with different rolling parameters is comprehensively investigated to provide a reference for the rolling process of graphene/copper composites with different demands.

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Strengthening mechanism of Al matrix composites reinforced by nickel-coated graphene: Insights from molecular dynamics simulation

Cited by 24 publications

References 44 publications

Investigation on the Mechanical Properties of Polycrystalline Mg Using Molecular Dynamics Simulation

Investigation on the Mechanical Properties of Polycrystalline Mg Using Molecular Dynamics Simulation

Recent advances in 2D graphene reinforced metal matrix composites

Microstructure Evolution of Graphene and the Corresponding Effect on the Mechanical/Electrical Properties of Graphene/Cu Composite during Rolling Treatment

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