Mechanical and dry sliding wear behaviour of hot rolled hybrid composites produced by direct squeeze casting method

Lokesh, G. N.; Ramachandra, M.; Mahendra, K. V.

doi:10.1016/j.matpr.2018.01.038

Cited by 3 publications

(3 citation statements)

References 23 publications

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“…Prasad and Ramachandra (2018) fabricated the LM6 and Al-fly ash composite using the squeeze casting technique and found that the fabricated composite had superior wear resistance compared to the base alloy. Lokesh et al (2018) studied the mechanical and wear behaviour of hot-rolled hybrid Al-Cu/fly-ash/SiC MMC manufactured through direct squeeze casting. The fabricated composite reported enhanced hardness and tensile properties.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of microhardness and wear properties of Al 6063 composite reinforced with yttrium oxide using stir casting process

Butola

Yuvaraj

Singh

et al. 2021

WJE

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Purpose This study aims to analyse the changes in mechanical and wear performance of aluminium alloy when yttrium oxide particles are incorporated. The microstructures are studied to analyse the change in the grain structures. Worn surfaces are observed via scanning electron microscope to study the wear mechanism in detail. Design/methodology/approach Stir casting is used to incorporate varying composition of yttrium particles, having an average particle size of 25 micrometer, in aluminium alloy 6063 matrix. Wear testing is carried out by DUCOM manufactured high temperature rotatory tribometer, and an indentation test is used for analysing the microhardness of the fabricated samples. Findings Microhardness of the material is increased with the increasing content of particulate addition. With the increasing content of reinforcement, more refined grains are produced. The load is transferred from the matrix to more rigid yttrium oxide particles. These factors contributed to escalated microhardness of the reinforced samples. Particulate addition enhanced the wear performance of the material; this might be attributed to increased microhardness and formation of an oxide layer. Originality/value Aluminium composites are finding wide applications in various industries, and there is always a requirement of material with enhanced tribological properties. Yttrium oxide particles exhibit improved mechanical properties, and their interaction with the aluminium matrix has not been studied much in the past. So, in this work, yttrium oxide incorporated aluminium matrix is studied.

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Section: Introductionmentioning

confidence: 99%

Evaluation of microhardness and wear properties of Al 6063 composite reinforced with yttrium oxide using stir casting process

Butola

Yuvaraj

Singh

et al. 2021

WJE

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“…The porosity is increased by the following mechanisms: (i) air trapped in the clusters of particles as well as the delayed metal flow inside them, (ii) increasing effective viscosity and improper filling of the gaps between adjacent particles and (iii) increasing surface gas layers surrounding particles [27][28]. These voids can be eliminated by choosing secondary process [29]. Fig.…”

Section: Porositymentioning

confidence: 99%

A Study on Particle Weight Fraction and Extrusion on the Mechanical Properties and Microstructural Evaluation of Al-Cu/Fly Ash Composite

Lokesh

Prasad²,

Subramanya³

et al. 2020

AMR

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Fly ash is the waste product coming out from thermal power plant is an increasingly urgent problem due to its storage and disposal. At the same time Metal Matrix composites (MMCs) reinforced with ceramic particles such as SiC, Al2O3 and B4C has their partial use in engineering application due to higher cost. The study focuses on the Al-Cu alloy reinforced fly ash particles produced by stir casting followed by hot extrusion. The composites produced by incorporation of fly ash reinforcements by varying 2%, 4%, 6%, 8% and 10wt% is hot extruded with an extrusion temperature of 400°C, extrusion rate of 5mm/s and extrusion ratio of 1.77:1. The extrusion composites have been evaluated based on the investigation of mechanical properties and microstructure. The results showed that, the amount of porosity increased with increasing the percentage of fly ash reinforcements in stir cast and the extruded composites is almost gratis from porosity. Hardness and tensile strength of composites increases with increases in percentage of reinforcement by stir and extruded composites. But extruded composites show better mechanical properties than stir cast composites. Wear test under different loads and for 45 minutes duration have been conducted on both cast and extruded composites. The worn surfaces have been observed under Scanning electron microscope (SEM) to understand the mechanism of wear. Extruded composites possess lower wear rates under all studied loads with constant sliding velocities when compared with cast composites. Microstructural study using SEM shows that the fly ash particulates in the molten matrix forms strong matrix reinforcement interface and their distribution might have led to the increase in mechanical properties of the composites due to fine grain structure during extrusion and dislocation density in the matrix.

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“…Te addition of silicon carbide (SiC) particles in the copper composites reduces the wear rate of the material concerning sliding velocity and load [16]. 4% addition of fy ash along with SiC increases the hardness, tensile strength, and wear resistance of the copper-based material [17]. Kumar et al [18,19] reviewed on the mechanical and thermal properties of for structural applications of graphene hybrid polymer nanocomposites and extended it for efects of various functional groups.…”

Section: Introductionmentioning

confidence: 99%

Dry Sliding Wear Behavior of Copper Matrix Composites Enhanced with TiO2 and MoS2 Hybrids

Subbian,

Sandeep,

Jayasheel Kumar

et al. 2024

Advances in Materials Science and Engineering

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The paper deals with the properties of copper-based composites. Copper is contributing to the field of automobiles and aerospace industries. The tribological properties of copper are not found to be satisfactory, which may be attributed to the support of producing copper matrix composites with extensive investigations into their properties. Coper-based hybrid composites were fabricated by reinforcing titanium dioxide (TiO2) and molybdenum disulphide (MoS2) to enhance the wear and mechanical properties of copper composites. Three specimens were prepared by powder metallurgy process with the designations of Cu + 5wt.%TiO2, Cu + 5wt.%TiO2 + 2wt.% MoS2, and Cu + 5wt.% TiO2 + 4wt.% MoS2. The metallurgical analysis was done on the specimens using X-ray diffraction (XRD) analysis which confirms the presence and distribution of Cu, TiO2, and MoS2 particles in the specimens. The wear rate was studied on the specimens concerning the sliding velocity, load, and MoS2 content. The statistical analysis and Taguchi analysis highlight the influencing parameters on the wear rate of the material. Linear regression equations were developed to predict the wear rate using DoE. Through this analysis, the sliding velocity of 3 m/s, a load of 30 N, and a 4% addition of MoS2 were identified as the optimum parameters for the minimal wear rate. The wear mechanism was analyzed using scanning electron microscopy techniques to reveal the adhesion, delamination, and oxidation.

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Mechanical and dry sliding wear behaviour of hot rolled hybrid composites produced by direct squeeze casting method

Cited by 3 publications

References 23 publications

Evaluation of microhardness and wear properties of Al 6063 composite reinforced with yttrium oxide using stir casting process

Evaluation of microhardness and wear properties of Al 6063 composite reinforced with yttrium oxide using stir casting process

A Study on Particle Weight Fraction and Extrusion on the Mechanical Properties and Microstructural Evaluation of Al-Cu/Fly Ash Composite

Dry Sliding Wear Behavior of Copper Matrix Composites Enhanced with TiO2 and MoS2 Hybrids

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