Experimental Investigation of the Mechanical Properties of Aluminum Sheets Reinforced by Carbon Nanotubes Utilizing Accumulative Roll Bonding Process

Document Type : Research Article

Authors

1 Mechanical Engineering, Amirkabir University of Technology

2 Mechanical Engineering, Amirkabir University of Technology, Iran, Tehran

Abstract

In this study, aluminum sheets reinforced by carbon nanotubes were fabricated using the Accumulative Roll Bonding method. The accumulative roll bonding process was chosen among the severe plastic deformation methods to strengthen metal sheets using carbon nanotubes owing to the enhanced microstructure and mechanical properties of final products. In order to evaluate the mechanical properties of the specimens, tensile tests were carried out and the strength of sheets made by accumulative roll bonding method was compared to single-layer pure aluminum and reinforced composite sheets. Microstructural changes of composite sheets were studied by optical microscopy after each cycle of rolling process. The results showed that spreading of (0.05 to 0.15) wt% of carbon nanotubes increased the ultimate strength of the composite sheets while by aggregating the carbon nanotubes more than 0.15 wt% a decreasing trend of the ultimate strength was observed.. Furthermore, the composites fabricated from 7 cycle of rolling process had a homogeneous distribution of particles and strong bonding between particles and matrix without having any porosity. Also it was found that the tensile strength of composite sheets also increased as the number of cycles increased.

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References

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Amirkabir Journal of Mechanical Engineering
Volume 52, Issue 3
June 2020
Pages 635-646

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