Fabrication and the mechanical and physical properties of nanocarbon-reinforced light metal matrix composites: A review and future directions

Ogawa, Fumio; Masuda, Chitoshi

doi:10.1016/j.msea.2021.141542

Cited by 62 publications

(14 citation statements)

References 138 publications

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“…This is due to evolution of dislocation density both in grain interior and grain boundary affected zone (GBAZ) regions [7,15,48,49]. As a matter of fact, a high density of GNDs near the Al/CNT interface can be induced due to the significant strain incompatibility [5,7,50,51]. The strengthening mechanism of coarse grain and fine grain composite materials mainly contained the GB strengthening (mostly caused by HAGBs and LAGBs), dislocation strengthening (mostly resulted from individual dislocations inside the Al grain interior), Orowan strengthening (mostly caused by the interaction between mobile dislocations and CNTs), load transfer strengthening (mostly is can be estimated by the shear lag model [7,15], and CNT strengthening (mostly due to accommodating of GNDs by the near-interface strain gradients during deformation, which provide back stress upon mobile dislocation, resulting in higher flow stress [3,29,44]).…”

Section: Microstructure and Mechanical Propertiesmentioning

confidence: 99%

A Quantitative Investigation of Dislocation Density in an Al Matrix Composite Produced by a Combination of Micro-/Macro-Rolling

et al. 2022

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An aluminum matrix composite with dispersed carbon nanotubes (CNTs) was produced via flake powder metallurgy using a micro-rolling process and vacuum hot pressing (VHP), followed by conventional rolling using a macro-rolling process. The microstructure and mechanical properties of the produced composites were studied. In addition, a new quantitative model was introduced to study the dislocation density based on the microstructural parameters. The results revealed that the distribution characteristics of the CNTs in the Al matrix and the Al-CNT interfaces were the two main governing parameters of dislocation density. Moreover, the dependence of dislocation density on the geometry of the grains and crystallographic texture was shown in this model. The microstructural evolution revealed that a lamellar grain structure had been achieved, with a high capacity for the storage of dislocation. A uniform distribution of CNTs with high bonding quality was also seen in the final microstructure.

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Section: Microstructure and Mechanical Propertiesmentioning

confidence: 99%

A Quantitative Investigation of Dislocation Density in an Al Matrix Composite Produced by a Combination of Micro-/Macro-Rolling

et al. 2022

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“…However, its development is restricted by low absolute strength, low modulus and poor creep resistance, so the reinforcements, such as SiC, Al 2 O 3 , TiC and carbon nanotube (CNT), are added in Mg alloys to fabricate magnesium matrix composites. Among these reinforcements, carbon nanotubes (CNT) are one of the most promising potential reinforcements [ 2 ] for magnesium matrix composites due to their advantages [ 3 , 4 ] such as high strength (~30 GPa), Young’s modulus (~1 TPa), ultra-high thermal conductivity (up to 6000 W/(m K)), electrical conductivity (~1.5 × 10 −6 S/m) and high aspect ratio. With the same volume fraction of addition, the performance improvement of CNT is much better than that of commonly used SiC particle reinforcement [ 5 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of CNT Content on Microstructure and Properties of CNTs/Refined-AZ61 Magnesium Matrix Composites

Ding

Shi

et al. 2022

Nanomaterials

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Carbon nanotubes (CNTs) reinforced magnesium matrix composites have great application potential in the transportation industry, but the low absolute strength is the main obstacle to its application. In this paper, copper-coated CNTs and AZ61 powder were used as raw materials to prepare CNTs/refined-AZ61 composites with good interfacial bonding, uniformly dispersed CNTs and fine grains by the process of ball milling refinement of AZ61 powder, ball milling dispersion and hot-pressing sintering. When the volume fraction of CNTs is less than or equal to 1 vol.%, CNTs can be uniformly dispersed and the yield strength and compressive strength of composites increase with higher CNT content. When the volume fraction of CNTs is 1 vol.%, the compressive strength and yield strength of composites reach 439 MPa and 361 MPa, respectively, which are 14% and 9% higher than those of matrix composites with nearly the same value of fracture strain. When the volume fraction of CNTs is greater than 1 vol.%, with the increase in CNT content, CNT clustering becomes more and more serious, resulting in a decrease in the strength and fracture strain of composites.

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“…However, the industrial utilization of this non-heat-treatable aluminum series, especially 5052 aluminum alloy (Al5052), is relatively restricted due to its low strength, ductility, formability, and wear resistance. To overcome these limitations, researchers over the last three decades have introduced and examined various techniques such as metal matrix composite (MMC) technologies and plastic deformation processes that improve the microstructure as well as the mechanical properties of the final product [2][3][4][5][6]. Nevertheless, each method has its own pros and cons.…”

Section: Introductionmentioning

confidence: 99%

Microstructure evolution, texture development, and mechanical properties of hot-rolled 5052 aluminum alloy followed by annealing

Wu¹,

Djavanroodi²,

Göde³

et al. 2022

Mater. Res. Express

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Aluminum alloys, especially the 5000 series, have drawn the attention of the transportation industry due to their lightweight and consequently reduced fuel consumption. In this regard, one of the major problems of this alloy is its low strength and ductility that can be solved using rolling and post-annealing. Accordingly, the present study concentrates on this issue. Microstructural images showed that the rolling process develops a lot of tangled and trapped dislocations in the sample, which gradually lead to the formation of dislocation bundles and networks. Subsequent annealing can produce a more homogeneous structure with clear grain boundaries and low dislocation density in the inner region of the grains. However, grain refinement efficiency through rolling is retained even after annealing. Initial and rolled Al5052 with the maximum intensity of 2.87 and 6.33 possess the lowest and highest overall texture. Also, post-annealing decreases the texture intensity to 6.33 and 4.87 at 150 and 200 °C, respectively. In this context, deformation texture components strengthen considerably after the rolling process due to the formation of shear bands, and they slightly weaken during heat treatment. Although the initial annealing of the as-received material does not cause discontinuous recrystallization during rolling, it may facilitate the material recovery before rolling. Post-annealing was found to decrease the improved effect of strength by rolling and increase the negative influence of ductility due to the inhibition of dislocation strengthening. The results showed that both dislocation density and the precipitation of Mg atoms are influential for electrical resistivity.

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Fabrication and the mechanical and physical properties of nanocarbon-reinforced light metal matrix composites: A review and future directions

Cited by 62 publications

References 138 publications

A Quantitative Investigation of Dislocation Density in an Al Matrix Composite Produced by a Combination of Micro-/Macro-Rolling

A Quantitative Investigation of Dislocation Density in an Al Matrix Composite Produced by a Combination of Micro-/Macro-Rolling

Effect of CNT Content on Microstructure and Properties of CNTs/Refined-AZ61 Magnesium Matrix Composites

Microstructure evolution, texture development, and mechanical properties of hot-rolled 5052 aluminum alloy followed by annealing

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