Effect of hot isostatic pressing on the mechanical properties of aluminium metal matrix nanocomposites produced by dual speed ball milling

Almotairy, Saud M.; Boostani, A. Fadavi; Hassani, Mohsen; Wei, Dongbin; Jiang, Zhengyi

doi:10.1016/j.jmrt.2019.11.043

Cited by 22 publications

(7 citation statements)

References 33 publications

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“…Aluminium matrix composites containing ceramic reinforcements can also exhibit low thermal expansion coefficient, making them as unique materials to be used in defense, cosmonautics, automotive industry, and many other areas [10][11][12] . SiC is one of the most common particulate reinforcements for strengthening the aluminium matrix [13][14][15] . However, achieving a significant reduction in the ductility of aluminum MMCs reinforced with SiC microparticles is a key challenge [16][17][18] .…”

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confidence: 99%

Superior Mechanical Performance of Inductively Sintered Al/SiC Nanocomposites Processed by Novel Milling Route

Almotairy

Alharthi

Alharbi

et al. 2020

Sci Rep

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This paper explores new routes for flake powder metallurgy, with the aim of designing an effective route for fabricating metal matrix nanocomposites, combining high strength and good ductility. A new route that uses three speeds, instead of the two speeds characterizing the shift-speed ball milling (SSBM) route, has been suggested and implemented. the mechanisms of these routes were illustrated based on the intensity of ball-powder-ball collisions and the morphology evolution. the ball milled powder were characterized using filed emission scanning electron microscope (FESEM), X-ray diffractometer (XRD) and Energy dispersive spectroscopy (EDS) to investigate the morphology evolution of the composites powder and the homogenous distribution of the Sic nanoparticles within the Al matrix. the reinforcing adequacy and interfacial bonding of 2 wt.% SiC nanoparticles in an inductively sintered composite has been investigated. Mechanical testing of the produced bulk composites resulted in achieving superior mechanical properties, characterized by 92% higher hardness, 180% higher yield strength, 101% higher ultimate strength, and 0% loss in uniform elongation, compared with those of regular SSBM. This is attributed to the homogeneous dispersion of the reinforcement into the Al matrix.

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Superior Mechanical Performance of Inductively Sintered Al/SiC Nanocomposites Processed by Novel Milling Route

Almotairy

Alharthi

Alharbi

et al. 2020

Sci Rep

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“…This phenomenon might be related to the solid phase sintering route, where no involvement of the liquid phase would significantly react with the reinforcement. 44,45 However, it should be noted that a small amount of Al 4 C 3 , which cannot be detected by XRD, may have formed as Almotairy et al 45 indicated. Moreover, only a small broadening of the matrix peaks was encountered.…”

Section: Resultsmentioning

confidence: 99%

Investigation of magnetite concentrate utilization as reinforcement in aluminum matrix composites

Birol

Mısırlıoğlu

Çakιr

2022

Journal of Composite Materials

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The utilization of harder particles with magnetic properties as reinforcement in aluminum matrix composites (AMCs) enhances the mechanical and magnetic properties of aluminum. Present study investigates the utilization of magnetite concentrate (MC), which is composed of mainly Fe3O4, as reinforcement in AMCs. To achieve this goal, commercially pure Al and MC powders were blended (0–40 wt.% of MC) and ground by high energy ball milling, pressed, and sintered at 600°C for 30 min under an argon atmosphere. The products were characterized by XRD, and SEM analyses. Also, the density and porosity of the samples were determined by Archimedes’ principle. According to the results, it was observed that with the increasing reinforcement amount, agglomeration of the MC particles inside the Al matrix, as well as the porosities of the samples, increased. 10–20 wt. % of MC containing samples, the porosity values were obtained around 12 vol. %, however higher reinforcement amounts, raised the porosity values to 17.33 vol. % linearly. With the increment in both nonconductive MC particles and pores, the electrical conductivity of the samples decreased linearly. On the other hand, hard reinforcement particles played a positive role in both hardness and wear properties and a 43.37 HB of hardness value and 0.197 m3/N.m × 10−12 specific wear rate was obtained for the sample containing 40 wt. %, MC. In addition, an increase in magnetic properties was observed in direct proportion to the amount of MC particles added, up to 31 Am2.kg−1 of saturation magnetization.

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“…After that, the raw Al powders are added in the gel-like CNTs-ethanol solution, stirred and then dried in vacuum at 70℃ for 2 h to obtain CNTs/Al spherical powders. To make the composite, flake PM via a dualspeed BM route [18,45] conducted using a planetary ball mill at low-speed BM(LSBM) at 160rpm for 8h, hereafter denoted as 160/8, followed by high-speed BM (HSBM) at 270rpm for 1h, hereafter denoted as 270/1, in an argon atmosphere at 1 atm. Preliminary experiences demonstrated that the combination of LSBM and HSBM lads to uniform CNT dispersion in Al flakes thanks to LSBM, and good bonding of CNT/Al flakes thanks to HSBM.…”

Section: Methodsmentioning

confidence: 99%

Microstructure Dependent Dislocation Density Evolution in Micro-macro Rolled CNT/Al Composite

Sadeghi¹,

Cavaliere²

2021

Preprint

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Flake powder metallurgy combined with micro/macro rolling was employed to produce CNT/Al composites. The effect of deformation mode on the lamellar ultrafine grain structure and on the dislocation density was analyzed. Additionally, a model based on microstructure and processing parameters is proposed to analyze the effect of size, aspect ratio and crystallography texture of the matrix grains on dislocation density. It was shown that the dislocation density depends on CNTs dispersion degree and CNT-aluminum interfacial bonding level as a consequence of micro rolling process, as well as on the grain refinement, crystallography texture, and high aspect ratio resulted from macro-rolling process. It was demonstrated that the micro/macro rolling process provides the lamellar ultrafine grains with higher dislocation storage capability with respect to equiaxed grains. The described process indicated that it could provide good combination between the CNTs dispersion, CNT-aluminum interfacial bonding as well as crystallography texture, size and shape of the matrix grains.

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Effect of hot isostatic pressing on the mechanical properties of aluminium metal matrix nanocomposites produced by dual speed ball milling

Cited by 22 publications

References 33 publications

Superior Mechanical Performance of Inductively Sintered Al/SiC Nanocomposites Processed by Novel Milling Route

Superior Mechanical Performance of Inductively Sintered Al/SiC Nanocomposites Processed by Novel Milling Route

Investigation of magnetite concentrate utilization as reinforcement in aluminum matrix composites

Microstructure Dependent Dislocation Density Evolution in Micro-macro Rolled CNT/Al Composite

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