Mechanical Properties of magnesium hybrid composite reinforced with Al2O3 and MoS2 particles through PM route

VICTOR, M THOMAS; Selvakumar, G.; Surendarnath, S.; Ravindran, Parag

doi:10.1016/j.matpr.2020.08.246

Cited by 3 publications

(2 citation statements)

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“…The addition of two reinforcements with varying weight percentages (wt.%) forms hybrid composites [ 13 , 14 , 15 ]. The hybrid magnesium composites are a new class of metal matrix composites widely used in automotive, marine, aerospace, and structural applications due to their low density, good mechanical properties, better corrosion and wear resistance, and low thermal expansion coefficient compared to conventional metals and alloys [ 16 , 17 ]. Microstructure and morphological changes in carbon nanotube films deposited on different substrates (mica, quartz, and TGX grating) by FESEM and atomic force microscopy was reported previously [ 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Multi-Walled Carbon Nanotubes and Carbon Fiber Reinforcements on the Mechanical and Tribological Behavior of Hybrid Mg-AZ91D Nanocomposites

et al. 2022

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Magnesium matrix composites are extensively used in automotive and structural applications due to their low density, high strength, and wear-resistant properties. To reach the scope of industry needs, research is carried out regarding enhancing the mechanical and tribological behavior of the magnesium composites by reinforcing the nano-sized reinforcements. In the present work, research has been carried out to enhance the properties of the magnesium AZ91D hybrid composite by reinforcing carbon fibers (CFs) and multi-walled carbon nanotubes (MWCNTs) with varying weight percentages (AZ91D + 0.5% CF’s + 0.5% MWCNT and AZ91D + 0.75% CF’s + 0.75% MWCNT, respectively). The experimental tests were carried out to evaluate the mechanical and tribological behavior of the composites. The test results showed that the addition of CF and MWCNT reinforcements improved the hybrid Mg composite’s hardness, tensile strength, and impact strength compared to the base Mg matrix. The AZ91D + 0.75% CF’s + 0.75% MWCNT hybrid composite showed a 19%, 35%, and 66% increased hardness, tensile strength, and impact strength, respectively, compared to the base Mg AZ91D. The wear test results also showed the improved wear resistance of the Mg composite compared to the base matrix. The enhanced wear resistance of the composite is due to the addition of hard MWCNT and CF reinforcements. The wear rate of the AZ91D + 0.75%CF’s + 0.75% MWCNT composite for a load of 30 N at a sliding distance of 1500 m is lower as compared to the base matrix. The SEM micrographs of the worn surfaces revealed the existence of abrasive wear. The improved mechanical and tribological behavior of the magnesium composite is also due to the homogeneous distribution of the hard reinforcement particles along the grain boundaries.

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Section: Introductionmentioning

confidence: 99%

Effect of Multi-Walled Carbon Nanotubes and Carbon Fiber Reinforcements on the Mechanical and Tribological Behavior of Hybrid Mg-AZ91D Nanocomposites

et al. 2022

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“…1, 2 The researchers were focusing on manufacture of MMCs by combining the ceramics and agro-industrial waste as a hybrid metal matrix composite which will be able to give superior properties. For the industrial applications, the most commonly used ceramics for the manufacture of MMCs are TiC, 3,4 Gr, 4,5 SiC, 5–10 B4C, 11–13 Al 2 O 3 , 5,6, 14–16 TiB 2 17 and agro wastes like Rice Husk Ash, 18 Bamboo Leaf Ash, 19 Red Mud, 20 Bagasse Ash 21 and Fly Ash. 22…”

Section: Introductionmentioning

confidence: 99%

Dry sliding wear behavior of aluminum alloy 6082 - SiC composites through ex-situ casting process

Surendarnath

Ramesh

Ramachandran

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part J:

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The applications of AA6082 alloys in the structural and transport are found to be more due its light weight. To improve strength to weight ratio and stress resistance, the carbides/oxides are added and this will leads to improvement in the mechanical properties and high stress sustainability. In this research work, AA6082 Metal Matrix Composite (MMC) is manufactured through the ex-situ casting process with the Silicon Carbide (SiC) reinforcements of 2.5 & 5 wt% and the microstructure evolution, hardness, dry sliding wear behavior and tensile properties of MMCs are investigated. As-cast AA6082 showed the dendritic microstructure with intermetallic eutectics. The presence of SiC particulates in AA6082 resulted in decreased grain size and equixed grains. The hardness of the tested as casted AA6082 samples was found to be 81 HV which has been increased to 93 HV and 107 HV and the tensile strength of AA6082 is increased by 16% and 41% by addition of 2.5 wt% SiC and 5 wt%SiC respectively due to the presence of the SiC particulates. At the same time coefficient of friction of AA6082 is found to be decreased by 11.8% and 20.5% for the testing load of 10N and the corresponding decrease in wear rates were found to be 50.8% and 70.3% respectively. The worn surface showed the continuous groove parallel to sliding direction with short cracks, bidirectional rough grooves with peeled-off SiC, unidirectional smooth scratches along the sliding surfaces for as-cast AA6082, AA6082-2.5 wt SiC and AA6082-5 wt SiC respectively that indicates the significant effects of SiC particulates on wear mechanism.

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DRY SLIDING WEAR AND CORROSION BEHAVIOR OF AA7075–SiC COMPOSITES

SURENDARNATH,

RAMESH,

RAMACHANDRAN

2024

Surf. Rev. Lett.

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Automobile structural components are subject to high stress, friction and corrosive environmental conditions. Though aluminum alloys exhibit lightweight and high corrosion resistance, there is a need to improve the high strength-to-weight ratio and resistance to friction. This paper presents microstructural analysis, hardness, dry sliding wear behavior, and corrosion behavior of AA7075 reinforced with silicon carbide (SiC) particles. The composite specimens were prepared at the concentration of 2.5 and 5[Formula: see text]wt.% SiC. The microstructure of AA7075 showed dendritic morphology while composite specimens showed nondendritic morphology grains. Reinforcement of SiC resulted in increased nucleation site and refinement of grain during solidification. XRD analysis of base alloy showed [Formula: see text] matrix with [Formula: see text] (MgZn2), T(Al–Zn–Mg–Cu) and Al7Cu2Fe phases, while the composite sample showed the presence of additional S(Al2CuMg) and [Formula: see text] (Al2Cu) phases. Composite samples showed higher hardness values than base alloy due to grain boundary strengthening and Orowan strengthening. The enhancement of hardness of AA7075 by 20% and 37.5% were obtained with the addition of 2.5 and 5[Formula: see text]wt.% SiC particles respectively and also predicted with less coefficient of friction and less wear rate at all the tested load conditions. At the same time, the respective reduction in wear rates of AA7075 was found to be 50 and 65%. The worn-out surface of the base alloy was found to have undergone extensive plastic deformation and resulted in delamination with extensive patches and no clear groove marks. The composite sample of 2.5[Formula: see text]wt.% SiC showed mild patches with clear groove marks, while the Composite of 5[Formula: see text]wt.% SiC showed groove marks with fine width parallel to sliding directions. The wear mechanism was found to be transferred from adhesive mode to abrasive mode through a mixed mechanical layer with an added concentration of SiC particles from 0[Formula: see text]wt.% to 5[Formula: see text]wt.%. Weight loss during immersion corrosion increases with an increase in the amount of SiC due to an increased amount of metallic phase which increases microgalvanic corrosion and pitting. Hence, composite samples showed decreased corrosion resistance than base alloy.

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Mechanical Properties of magnesium hybrid composite reinforced with Al2O3 and MoS2 particles through PM route

Cited by 3 publications

References 14 publications

Effect of Multi-Walled Carbon Nanotubes and Carbon Fiber Reinforcements on the Mechanical and Tribological Behavior of Hybrid Mg-AZ91D Nanocomposites

Effect of Multi-Walled Carbon Nanotubes and Carbon Fiber Reinforcements on the Mechanical and Tribological Behavior of Hybrid Mg-AZ91D Nanocomposites

Dry sliding wear behavior of aluminum alloy 6082 - SiC composites through ex-situ casting process

DRY SLIDING WEAR AND CORROSION BEHAVIOR OF AA7075–SiC COMPOSITES

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