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Mechanical behavior and fractography of graphite and boron carbide particulates reinforced A356 alloy hybrid metal matrix composites

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Abstract

The present work shows the mechanical behavior of as-cast A356 alloy and A356-4 wt% graphite (Gr)-12 wt% boron carbide (B4C) hybrid composites. The hybrid composite samples were developed by two stage stir casting technique. The developed hybrid composites were subjected to scanning electron microscope (SEM) and energy dispersive spectroscope to analyze its microstructure followed by physical and mechanical tests like density, hardness, and tensile tests. The SEM analysis showed almost uniform distribution of particulates; also, hardness and tensile properties improved upon addition of reinforcement viz., graphite and B4C. The density of hybrid composite decreased upon addition of reinforcement when compared with base A356 alloy. Fractography of tensile specimens were carried out for analysis of fractured surfaces.

The A356-B4C-graphite hybrid composites were developed by two stage stir casting technique. The developed hybrid composites were subjected to SEM to analyze its microstructure followed by physical and mechanical properties like density, hardness, and tensile tests.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Appa Institute of Engineering and Technology, Kalaburagi, Karnataka, India

    Pankaj R. Jadhav

  2. Department of Mechanical Engineering, South East Asian Engineering College, Bangalore, Karnataka, 560049, India

    B. R. Sridhar

  3. Aircraft Research and Design Centre, HAL, Bangalore, Karnataka, 560037, India

    Madeva Nagaral

  4. Department of Mechanical Engineering, East Point College of Engineering and Technology, Bangalore, Karnataka, 560069, India

    Jayasheel I. Harti

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  1. Pankaj R. Jadhav
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  2. B. R. Sridhar
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  3. Madeva Nagaral
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  4. Jayasheel I. Harti
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Correspondence to Madeva Nagaral.

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Jadhav, P.R., Sridhar, B.R., Nagaral, M. et al. Mechanical behavior and fractography of graphite and boron carbide particulates reinforced A356 alloy hybrid metal matrix composites. Adv Compos Hybrid Mater 3, 114–119 (2020). https://doi.org/10.1007/s42114-020-00143-7

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  • DOI: https://doi.org/10.1007/s42114-020-00143-7

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