Warm dynamic compaction of Al6061/SiC nanocomposite powders

Majzoobi, G.H.; Bakhtiari, Hamed; Atrian, Amir; Pipelzadeh, M K; Hardy, Stephen

doi:10.1177/1464420714566628

Cited by 14 publications

(7 citation statements)

References 39 publications

(73 reference statements)

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“…7,8 Faruqui et al 9 used the shockwave produced by an explosion for compaction of Mg-SiC powders and fabricated samples with 98-99% of theoretical density and investigated their microstructures. Majzoobi et al 10,11 and Majzoobi et al 12 and Atrian et al 13 also used dynamic equipment for compaction of Mg-SiC powder samples with different SiC nanoparticle volume fraction.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous effects of strain rate and temperature on mechanical response of fabricated Mg–SiC nanocomposite

Rahmani

Majzoobi

Atrian

2019

Journal of Composite Materials

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Mg–SiC nanocomposite samples were fabricated using split Hopkinson pressure bar for different SiC volume fractions and under different temperature conditions. The microstructures and mechanical properties of the samples including microhardness and stress–strain curves were captured from quasi-static and dynamic tests carried out using Instron and split Hopkinson pressure bar, respectively. Nanocomposites were produced by hot and high-rate compaction method using split Hopkinson pressure bar. Temperature also significantly affects relative density and can lead to 2.5% increase in density. Adding SiC-reinforcing particles to samples increased their Vickers microhardness from 46 VH to 68 VH (45% increase) depending on the compaction temperature. X-ray diffraction analysis showed that by increasing temperature from 25℃ to 450℃, the Mg crystallite size increases from 37 nm to 72 nm and decreases the lattice strain from 45% to 30%. In quasi-static tests, the ultimate compressive strength for the compaction temperature of 450℃ was improved from 123% for Mg–0 vol.% SiC to 200% for the Mg–10 vol.% SiC samples compared with those of the compaction at room temperature. In dynamic tests, the ultimate strength for Mg–10 vol.% SiC sample compacted at high strain rate increased remarkably by 110% compared with that for Mg–0 vol.% SiC sample compacted at low strain rate.

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Section: Introductionmentioning

confidence: 99%

Simultaneous effects of strain rate and temperature on mechanical response of fabricated Mg–SiC nanocomposite

Rahmani

Majzoobi

Atrian

2019

Journal of Composite Materials

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“…These two stages can be applied concurrently [9] or consecutively [10]. Compaction stage can also be performed under different densification rates from quasi-static pressing [11,12] to dynamic compaction [13][14][15] and shock consolidation [16,17]. There are a large number of studies performed on quasi-static compaction [18,19] of powder, but less attention has been paid to dynamic compaction [20,21] or shock consolidation [22,23] techniques mainly because of more cost and complexity of latter techniques.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, Atrian et al [11,14] and Majzoobi et al [11,13,37] performed comprehensive studies on fabrication and characterisation of Al matrix nanocomposites using different compaction techniques from quasi-static hot pressing to dynamic compaction by a mechanical drop hammer and a single-stage gas-gun. A few researchers [30,38] also used SHPB for compaction purposes.…”

Section: Introductionmentioning

confidence: 99%

A novel approach for dynamic compaction of Mg–SiC nanocomposite powder using a modified Split Hopkinson Pressure Bar

2018

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In this paper, fabrication and characterisation of Mg-SiC nanocomposite are investigated. Micrometre-sized Mg powder with the different volume fraction of SiC nano particles were dynamically compacted using a modified Split Hopkinson Pressure Bar. Moreover, the compaction process was simulated using AUTODYN commercial software to demonstrate that the stress in the powder sample was sufficient for consolidation. To achieve the best quality samples, the effects of lubrication and compaction velocity on dynamic compaction process were initially studied by experiment. It was observed that the temperature of 450°C and the compaction velocity of 15.5 m/s led to the best samples with relative density more than 99%. The effects of reinforcing phase content on the relative density, micro-hardness, and compressive behaviour of the compacted samples along with their microstructures were investigated. The results showed that the micro-hardness and the compressive strength of the samples fabricated at 450°C increased about 70% and 50%, respectively.

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“…Metal matrix nanocomposites (MMNCs) form an exciting area of materials research because bulk composite materials with reinforcement sizes of less than 100 nm have properties that are not seen in their microscale counterpart. [1][2][3] Generally, decreasing the reinforcement size into the metal matrix can lead to substantial improvements in mechanical performance of resulting composite system. 4 MMNCs have higher strength and stiffness in comparison with conventional metal matrix composites filled with microscale particles while maintaining the ductility of the metals.…”

Section: Introductionmentioning

confidence: 99%

Multiscale analysis of the low-velocity impact behavior of ceramic nanoparticle-reinforced metal matrix nanocomposite beams by micromechanics and finite element approaches

Rasoolpoor

Ansari

Hassanzadeh-Aghdam

2019

Proceedings of the IMechE

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An efficient multiscale analysis is proposed to investigate the dynamic behavior of metal matrix nanocomposite beams reinforced by SiC nanoparticles under low-velocity impact loads. First, an analytical micromechanics model is developed to obtain the effective elastic properties of ceramic nanoparticle-reinforced metal matrix nanocomposite, and then the finite element method is used to predict the dynamic response of beams made of this nanocomposite material. Two important microstructural features, including size effect and agglomeration of nanoscale particles, are incorporated into the micromechanical analysis. The present simulation results for the elastic modulus and low-velocity impact response show good agreement with previously published results. The effects of volume percent, diameter and dispersion type of ceramic nanoparticles, geometrical features and boundary conditions of nanostructure, velocity and size of projectile on the contact force, and center deflection time histories of metal matrix nanocomposite beams are extensively examined. Analysis shows that homogenously distributed SiC nanoparticles into the metal matrix nanocomposites can obviously increase the nanostructure/projectile contact force and decrease both the beam center deflection and impact duration which is due to the enhancement of elastic properties. However, the ceramic nanoparticle agglomeration has an effect on the decrease of contact force and the increase of both the center deflection and impact duration. Also, it is concluded that decreasing nanoparticle size can increase the contact force and decrease the beam center deflection.

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Warm dynamic compaction of Al6061/SiC nanocomposite powders

Cited by 14 publications

References 39 publications

Simultaneous effects of strain rate and temperature on mechanical response of fabricated Mg–SiC nanocomposite

Simultaneous effects of strain rate and temperature on mechanical response of fabricated Mg–SiC nanocomposite

A novel approach for dynamic compaction of Mg–SiC nanocomposite powder using a modified Split Hopkinson Pressure Bar

Multiscale analysis of the low-velocity impact behavior of ceramic nanoparticle-reinforced metal matrix nanocomposite beams by micromechanics and finite element approaches

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