A Review on Mechanical and Thermal Properties of Aluminum Metal Matrix Composites

Reddy, K. Sunil Kumar; Kannan, M. Bobby; Karthikeyan, R.; Prashanth, S.; Reddy, B. Rohith

doi:10.1051/e3sconf/202018401033

Cited by 12 publications

(8 citation statements)

References 20 publications

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“…increases. This decrease in thermal properties is due to the lower conductivity of the reinforcement material (pumice) when compared to virgin aluminum material (Cem Okumus et al 2012, Santhosh et al 2019: Reddy et al 2020Reddy et al , 2021. The composite's optimum thermal conductivity of 115.1 W m −1 • C was observed at a PP content of 2.5 wt%.…”

Section: Effect Of Stir Casting Process Parameters On the Thermal Con...mentioning

confidence: 99%

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Optimization and statistical modeling of the thermal conductivity of a pumice powder and carbonated coal particle hybrid reinforced aluminum metal matrix composite for brake disc application: a Taguchi approach

Ibrahim

YAWAS

DAN-ASABE

et al. 2023

Funct. Compos. Struct.

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Aluminium metal matrix composites have been gaining traction in recent years due to their good mechanical properties and low weight. Particulate reinforcements for the improvement of its properties have been explored. This research aimed to determine the optimal composition of the reinforcement content (pumice powder and carbonated coal particles) and processing parameters (stirring speed, processing temperature, and stirring time) on the thermal conductivity of the developed material and also to characterize the constituents using XRF, XRD, and SEM/EDX. The Taguchi optimization approach and regression analysis were used for the optimization and statistical analysis, respectively. The results revealed the optimum setting for stir casting process factors as regards thermal conductivity to be 2.5 %, 5.0%, 300 rpm, 850 °C, and 5 min for pumice powder, carbonated coal particles, stirring speed, temperature, and time, respectively. The obtained optimal thermal conductivity was 120.40 W/m°C which is a 131.54 % improvement of the conventional grey cast iron brake disc. The particulate reinforcements (pumice powder and carbonated coal particles) and the processing factors all had significant effects on the thermal conductivity of the material, with the carbonated coal particles having the highest percentage contribution of 16.51%, as established by the analysis of variance. A model for predicting the thermal conductivity was developed using regression analysis, and high prediction accuracy was established with R-Square, R-Square (adj), and R-Square (pred) values of 94.68 %, 88.60 %, and 79.94 %, respectively. The results of the characterization show the presence of hard compounds such as silica, iron oxide, and alumina in pumice powder and carbonated coal particles.

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Section: Effect Of Stir Casting Process Parameters On the Thermal Con...mentioning

confidence: 99%

“…Using these two discontinuous dispersoids as reinforcement reduces the thermal conductivity and improves the thermal stability coefficient of thermal expansion (CTE) and some mechanical, tribiological, and physical properties of the composite for brake disc application (Cem Okumus et al 2012, Dagwa and Adama 2018, Reddy et al 2020.…”

Section: Introductionmentioning

confidence: 99%

Optimization and statistical modeling of the thermal conductivity of a pumice powder and carbonated coal particle hybrid reinforced aluminum metal matrix composite for brake disc application: a Taguchi approach

Ibrahim

YAWAS

DAN-ASABE

et al. 2023

Funct. Compos. Struct.

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“…Also, the thermal mismatch between the high coefficient of thermal expansion matrix and the low coefficient of thermal expansion reinforcements (Al 2 O 3 and SiO 2 ) led to improved hardness as this thermal mismatch aided the generation of dislocations. 39 Finally, the improvement in the hardness properties of the composites can be linked to the increasing concentration of RHA and CFA as shown in Supplemental Figure 7.…”

Section: Mechanical Propertiesmentioning

confidence: 94%

Enhanced mechanical behaviour and grain characteristics of aluminium matrix composites by cold rolling and reinforcement addition (Rice husk ash and Coal fly ash)

Olorunyolemi

Ogunsanya

Akinwande

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part E:

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Aluminium matrix composites significantly benefit the manufacturing sector due to the high strength-to-weight ratio. However, grain refinement was one of the major problems faced by the research community and also as-cast AA6063 contained eutectic silicon with sharp, long elongated laths that consequently reduces strength and limit their applications. So, the prime novelty of this research work is to refine the grains by performing the cold rolling operation in AA6063 and incorporating rice husk ash and coal fly ash in the AA6063 matrix to break those eutectic laths which attributes to the enhancement of the mechanical properties. Rice husk ash and coal fly ash were chosen because they are economical, possess low density and are available in enormous quantities as solid waste by-products. They contain a substantial concentration of SiO2 and serve as a viable reinforcement for improving the mechanical properties of aluminium composites. In this research, the grain characteristics along with the mechanical properties of aluminium composites reinforced with rice husk ash and coal fly ash, produced by the stir casting technique were investigated. The reinforcements were added in varying concentrations (1.5 and 3.0 wt.%). Six specimens were fabricated of which five were cold rolled. Image J and Origin software was used in evaluating the average grain size of the fabricated alloys and their composites. The results were discussed with the help of grain size distribution and profile plots. Structural and composition studies were done using scanning electron microscopy, energy-dispersive X-ray spectroscopy and X-ray diffraction spectroscopy. Hardness and tensile tests were performed on the fabricated composites. The outcome of this research reveals, AA6063-3 wt.% rice husk ash composite has improved hardness (84HV) and tensile strength (156 MPa). Moreover, the average grain size of 10.52 µm was the main reason for the attainment of enhanced mechanical properties.

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“…Al.6063 -3 wt.% RHA composite showed the best hardness property (84 HV) succeeded by 3 wt.% CFA composite (79 HV) while the un-cold rolled Al.6063 alloy had the least hardness (65 HV). Also, thermal mismatch between the high co-e cient of thermal expansion matrix and the low coe cient of thermal expansion reinforcements (Al 2 O 3 and SiO 2 ) led to improved hardness as this thermal mismatch aided the generation of dislocations [32]. Finally, the improvement in the hardness properties of the composites can be linked to the increasing concentration of RHA and CFA as shown in gures 6 and 7.…”

Section: Hardnessmentioning

confidence: 94%

Influence of SiO2 form the rice husk ash and coal fly ash particles on the mechanical behaviour and grain characteristics of the stir-casted hybrid composites

Olorunyolemi

Ogunsanya

Akinwande

et al. 2022

Preprint

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The grain characteristics and mechanical properties of aluminium composites reinforced with Rice Husk Ash (RHA) and Coal Fly Ash (CFA), produced by double stir casting in a sand mould, were investigated. As-cast Al.6063 alloys contained eutectic silicon with sharp, long elongated laths which reduces strength and limits their applications. Cold rolling operation was selected to break those eutectic laths and refine the grains for the purpose of property enhancement. RHA and CFA were chosen because they are economical, possess low density and are available in enormous quantities as solid waste by-products. They contain a substantial concentration of SiO2 and serve as a viable reinforcement for improving mechanical properties of aluminium composites. The reinforcements were added in varying concentrations (1.5 and 3.0 wt.%). Six specimens were fabricated of which five were cold-rolled. Image J and Origin software was used in evaluating the average grain size of the fabricated alloys and its composites. The results were discussed with the help of grain size distribution and profile plots. Structural and composition analysis were done using scanning electron microscopy (SEM), EDX and XRD. Hardness and tensile tests were conducted on the aluminium composites. The results indicated that Al.6063-3 wt.% CFA composite demonstrated the best balance of mechanical properties with hardness of 79 HV, tensile strength of 151 MPa and average grain size of 11.39 µm. This improvement is linked to the effect of SiO2 in CFA and plastic deformation of the specimens.

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A Review on Mechanical and Thermal Properties of Aluminum Metal Matrix Composites

Cited by 12 publications

References 20 publications

Optimization and statistical modeling of the thermal conductivity of a pumice powder and carbonated coal particle hybrid reinforced aluminum metal matrix composite for brake disc application: a Taguchi approach

Optimization and statistical modeling of the thermal conductivity of a pumice powder and carbonated coal particle hybrid reinforced aluminum metal matrix composite for brake disc application: a Taguchi approach

Enhanced mechanical behaviour and grain characteristics of aluminium matrix composites by cold rolling and reinforcement addition (Rice husk ash and Coal fly ash)

Influence of SiO2 form the rice husk ash and coal fly ash particles on the mechanical behaviour and grain characteristics of the stir-casted hybrid composites

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