Comparison of the Mechanical Properties of AL6061/Albite and AL6061/Graphite Metal Matrix Composites

Ramesh, A.; Prakash, J. N.; Gowda, A. S. Shiva Shankare; Appaiah, Sonnappa

doi:10.4236/jmmce.2009.82009

Cited by 36 publications

(16 citation statements)

References 17 publications

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“…In fact, as the graphite content is increased from 0% to 4% the hardness decreases by about 23%. In case of metals, as the Ultimate Tensile Strength (UTS) of a material increases, so would the hardness but the opposite is seen in this particular composite, whereby the hardness drops as the UTS increases [18]. There is a good reason for this phenomenon, though, since graphite, being a soft dispersoid, does not contribute positively to the hardness of the composite.…”

Section: Hardnessmentioning

confidence: 99%

Effect of Particulate Reinforcements on the Mechanical Properties of Al6061-WC and Al6061-Gr MMCs

Swamy¹,

Ramesha²,

Kumar³

et al. 2011

JMMCE

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This paper presents the comparative study of the mechanical properties of Al6061-Tungsten carbide composites containing Tungsten carbide (WC) particulate, and Al6061-graphite particulate composites containing graphite particles. The reinforcing particulates in the MMCs vary from 0% to 4% by weight. The 'vortex method' of production was employed to fabricate the composites, in which the reinforcements were poured into the vortex created by stirring the molten metal by means of a mechanical agitator. The composites so produced were subjected to a series of tests. The results of this study revealed that as the Tungsten carbide particle content was increased, there were significant increases in the ultimate tensile strength, hardness and Young's modulus, accompanied by a reduction in its ductility. There was, however, only a very marginal increase in the compressive strength, where as in graphite reinforced composites as the graphite content was increased, there were significant reduction in hardness and monotonic increases in the ductility, ultimate tensile strength (UTS), compressive strength and Young's modulus of the composite, An attempt is made in the paper to provide explanations for these phenomena.

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Section: Hardnessmentioning

confidence: 99%

Effect of Particulate Reinforcements on the Mechanical Properties of Al6061-WC and Al6061-Gr MMCs

Swamy¹,

Ramesha²,

Kumar³

et al. 2011

JMMCE

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“…Hence, considerable work has been done in the recent years, to reinforce metal matrix composites to attain low friction, low wear rate and excellent mechanical properties [3][4].Among metal matrix composites particulate reinforced aluminum matrix composites which are becoming more attractive in the recent years, due to their superior strength to weight ratio, good ductility, high strength, excellent wear resistance, excellent corrosion resistance, high temperature creep resistance and better fatigue strength [5]. In fact, the particulate reinforced aluminum matrix composite has reached a sound position as advanced engineering materials, due to the enormous advantages like isotropic properties and the possibility of the fabrication of secondary components [1,3,6]. Among the various aluminum alloys, aluminum alloy 6061 reinforced by Al2O3 nanoparticles that are characterized as having cast ability, corrosion resistance and high strengthweight ratio.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties of Al 6061/Al2O3 Nanocomposite by Stir Casting

Al-Alkawi

Al-Salihi

2018

ETJ

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Present work deals with the examination of the mechanical properties of Al 6061 composites, which were successfully fabricated by stir casting technique and then reinforced by using different percentages of Al2O3 nanoparticles up to 10 wt%. The required samples were carefully prepared. Evaluation of the mechanical properties such as hardness, yield tensile stress and ultimate tensile stress were effectively obtained at various percentages of Al2O3 nanoparticles .It was found that the mechanical properties of 6061 /Al2O3 nanoparticles are critically influenced by the concentrations of the reinforced Al2O3 nanoparticle, since there was a substantial enhancement in the mechanical properties, as the fractions of Al2O3 nanoparticles increased. This improvement in the mechanical properties was attributed to the uniform distribution of reinforcement nanoparticles as well as the grain refinement of aluminum matrix with minimal porosity.

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“…There have been several developments in the field of aluminium alloys and its composites [1] . Introduction of Graphite has reduced the weight of the composites and have been proved to be best replacement for many automotive applications [2]. Similarly introduction of Borax has enhanced the light weight characteristics of Aluminium composites and a self lubricating effect when used at various quantities for the researchers [3] .…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Mechanical Properties of Borax and Graphite Based Al-6061 Composites

D¹

2015

IJRET

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Aluminium alloys Metal Matrix Composites are readily replacing automobile, industrial, and aerospace components because of their low density, high strength and good structural rigidity. There have been several technical challenges that exist with casting technology. A uniform distribution during the synthesis of these composite reinforcements with the matrix is a most challenging task in casting. The properties of the composites are directly affected by the casting technique. In the present work an attempt has been made to synthesize 6061Al-Graphite-Borax particulate metal matrix composites by liquid metallurgy route (stir casting technique). The addition level of reinforcement is being varied from 3-9 wt% in step of 3wt%. Graphite and Boron was the reinforcement used for enhancing the structural rigidity and weight reduction. Micro structural analysis was carried out to the composites developed by taking specimens from central portion of the casting to ensure homogeneous distribution of particles. Micro-hardness, tensile properties and wear properties of the composites were done as per the standards. Micro structural characterization revealed fairly uniform distribution in the matrix. The tensile strength of the composites was found to increase confirming the dispersed graphite in 6061Al alloy contributed in enhancing the tensile strength of the composites. The wear resistance of the 6061Al-Graphite composite was found to be encouraging for the use in various applications.

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Comparison of the Mechanical Properties of AL6061/Albite and AL6061/Graphite Metal Matrix Composites

Cited by 36 publications

References 17 publications

Effect of Particulate Reinforcements on the Mechanical Properties of Al6061-WC and Al6061-Gr MMCs

Effect of Particulate Reinforcements on the Mechanical Properties of Al6061-WC and Al6061-Gr MMCs

Mechanical Properties of Al 6061/Al2O3 Nanocomposite by Stir Casting

Evaluation of Mechanical Properties of Borax and Graphite Based Al-6061 Composites

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