Mechanical Behavior of Multiwalled Carbon Nanotube Reinforced 7075 Aluminum Alloy Composites Prepared by Mechanical Milling and Hot Extrusion

Uriza-Vega, E.; Carreño-Gallardo, C.; López-Meléndez, C.; Cuadros-Lugo, E.; Pérez-Bustamante, R.; Ledezma-Sillas, Ernesto; Ramirez, José Martin Herrera

doi:10.1590/1980-5373-mr-2018-0652

Cited by 12 publications

(14 citation statements)

References 27 publications

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“…As it was expected, by comparison with conventional AA 7075-O, a substantial increase in hardness is measured (more than 80%), and the increase in MWNTs concentration from 0.5 wt.% to 1 wt.% leads to a rise of almost 5% in the hardness of the composite. These results are similar [22] or even clearly superior [23] to those reported previously by other researchers in 7075 composites with similar weight percentages of MWCNTs. As with these cases, the increase in wt.% induces an increment in hardness.…”

Section: Mechanical Properties Of Compositessupporting

confidence: 91%

“…As with these cases, the increase in wt.% induces an increment in hardness. However, while in the mentioned papers, the tensile properties also showed an improvement with the increase in the reinforcement amount (until a maximum value of 1 wt.% [23] or 2 wt.% MWCNTs [22]), in our case, the best tensile behaviour is obtained with 0.5 wt.% MWCNTs.…”

Section: Mechanical Properties Of Compositescontrasting

confidence: 40%

“…At the same time, MWCNTs are being incorporated to the matrix of the particles, producing harder surfaces at each impact from the milling media, and therefore increasing their brittleness [32,33]. With the increasing content of MWCNTs, the effect is maximized, leading to a lower average particle size [22].…”

Section: Morphology and Size Of Aa7075-mwcnts Compositesmentioning

confidence: 99%

“…Only a few works have been published reporting results on reinforcing 7075 aluminium matrix with CNTs. Uriza-Vega et al [22] studied the influence of different CNTs contents (from 0 up to 3 wt.%) via powder metallurgy (ball milling, compression, pressureless sintering and hot extrusion). In order to improve the nanotubes' dispersion, a sonication stage in isopropyl alcohol was previously performed.…”

Section: Introductionmentioning

confidence: 99%

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MWCNT-Reinforced AA7075 Composites: Effect of Reinforcement Percentage on Mechanical Properties

Feijoó

Peña

Cabeza

et al. 2021

Metals

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Metal–matrix composites (MMC) of aluminium alloy 7075 (AA7075) containing 1 wt.% and 0.5 wt.% multiwall carbon nanotubes (MWCNTs) were developed by powder metallurgy, using a high energy ball milling (HEBM) process for dispersion of the MWCNTs. The powder of the AA7075-MWCNT obtained was characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The microstructural changes produced during the milling process, such as the modification of the crystallite size, as well as the micro-deformation of the matrix crystal lattice, were determined using the Scherrer formula. After consolidation into a strip shape using the hot powder extrusion (HPE) process at 500 °C, no porosity was detected and a fine homogeneous dispersion of the reinforcement into the matrix was obtained. After performing a 0.2 HV test and tensile tests in the extruded profiles of both composites, a better combination of properties was found in samples of AA7075-0.5 wt.% MWCNT, with the increase in measured ductility being especially remarkable.

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Section: Mechanical Properties Of Compositessupporting

confidence: 91%

Section: Mechanical Properties Of Compositescontrasting

confidence: 40%

Section: Morphology and Size Of Aa7075-mwcnts Compositesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

MWCNT-Reinforced AA7075 Composites: Effect of Reinforcement Percentage on Mechanical Properties

Feijoó

Peña

Cabeza

et al. 2021

Metals

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“…The positive effect of carbon nanotubes on the mechanical properties (tensile strength, compressive strength, flexural strength, etc.) of aluminum matrix nanocomposites has been described in many works [7,8,9]. However, the actually achieved indicators of the strength characteristics of Al/CNT composites remain below those theoretically predicted, which is due to the uneven distribution of reinforcement in the matrix, the unsatisfactory state of the interphase boundaries, and other factors.…”

Section: Introductionmentioning

confidence: 99%

Effect of Increasing the Strength of Aluminum Matrix Nanocomposites Reinforced with Microadditions of Multiwalled Carbon Nanotubes Coated with TiC Nanoparticles

et al. 2019

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Aluminum matrix composites reinforced with multiwalled carbon nanotubes (MWCNTs) are promising materials for applications in various high-tech industries. Control over the processes of interfacial interaction in Al/MWCNT composites is important to achieve a high level of mechanical properties. The present study describes the effects of coating MWCNTs with titanium carbide nanoparticles on the formation of mechanical properties and the evolution of the reinforcement structure in bulk aluminum matrix nanocomposites with low concentrations of MWCNTs under conditions of solid-phase consolidation of ball-milled powder mixtures. Using high-energy ball milling and uniaxial hot pressing, two types of bulk nanocomposites based on aluminum alloy AA5049 that were reinforced with microadditions of MWCNTs and MWCNTs coated with TiC nanoparticles were successfully produced. The microstructural and mechanical properties of the Al/MWCNT composites were investigated. The results showed that, on the one hand, the TiC nanoparticles on the surface of the MWCNT hybrid reinforcement reduced the damage of reinforcement under the intense exposure of milling bodies, and on the other hand, they reduced the contact area of the MWCNTs with the matrix material (acting as a barrier interface), which also locally inhibited the reaction between the matrix and the MWCNTs.

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Thermostructural properties of the Al + 1.5% MWCNT nanocomposite

et al. 2023

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Mechanical Behavior of Multiwalled Carbon Nanotube Reinforced 7075 Aluminum Alloy Composites Prepared by Mechanical Milling and Hot Extrusion

Cited by 12 publications

References 27 publications

MWCNT-Reinforced AA7075 Composites: Effect of Reinforcement Percentage on Mechanical Properties

MWCNT-Reinforced AA7075 Composites: Effect of Reinforcement Percentage on Mechanical Properties

Effect of Increasing the Strength of Aluminum Matrix Nanocomposites Reinforced with Microadditions of Multiwalled Carbon Nanotubes Coated with TiC Nanoparticles

Thermostructural properties of the Al + 1.5% MWCNT nanocomposite

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