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Mechanical Properties and Tribological Behavior of Al6061–SiC–Gr Self-Lubricating Hybrid Nanocomposites

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Abstract

In the present investigation, a newly fabricated Al6061 reinforced with various quantity (0.4–1.6 wt%) of nano SiC in steps of 0.4 and fixed quantity (0.5 wt%) of micro graphite particle’s hybrid nanocomposites were prepared by ultrasonic assisted stir casting method. The influence of nano SiC and graphite content on the mechanical and tribological properties of Al6061 hybrid nanocomposites were studied. The pin-on-disc equipment was used to carry out experiment at 10–40 N applied load, 0.5 m/s sliding speed and 1000 m sliding distance. The Al/SiC/Gr hybrid nano-composite and matrix alloy wear surfaces were characterized by FESEM equipped with an EDS, 3D profilometer to understand the wear mechanisms. The results of Al/SiC/Gr self-lubricating hybrid nano-composites showed improved wear resistance than the Al6061 matrix alloy. The co-efficient of friction of Al/SiC/Gr hybrid nano-composites were lower than those of the unreinforced alloy at various applied load. Compared to matrix alloy, the surface roughness of Al/SiC/Gr hybrid nano-composites had significantly reduced to 66% at low load and 75% at high load. Self-lubricating Al/SiC/Gr hybrid nanocomposites showed superior surface smoothness compared to matrix alloy.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Motilal Nehru Government Polytechnic College, Puducherry, 605 008, India

    I. Manivannan

  2. Department of Mechanical Engineering, Saveetha School of Engineering, Saveetha University, Chennai, Tamilnadu, 602 105, India

    S. Ranganathan

  3. Department of Mechanical Engineering, Adhiparasakthi Engineering College, Melmaruvathur, Tamilnadu, 603 319, India

    S. Gopalakannan

  4. Department of Mechanical Engineering, University College of Engineering, Nagercoil, Tamilnadu, 629 004, India

    S. Suresh

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  1. I. Manivannan
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  2. S. Ranganathan
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  4. S. Suresh
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Correspondence to I. Manivannan.

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Manivannan, I., Ranganathan, S., Gopalakannan, S. et al. Mechanical Properties and Tribological Behavior of Al6061–SiC–Gr Self-Lubricating Hybrid Nanocomposites. Trans Indian Inst Met 71, 1897–1911 (2018). https://doi.org/10.1007/s12666-018-1321-0

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  • DOI: https://doi.org/10.1007/s12666-018-1321-0

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