Microstructural Analysis and Mechanical Properties of Pure Al–GNPs Composites by Stir Casting Method

  • Venkata SubbaiahEmail author
  • Bhanu Palampalle
  • K. Brahmaraju
Original Contribution


The present investigation deals with the microstructural and mechanical properties of pure aluminium graphene nano-platelets (GNPs) composites. The contents of GNPs were varied from 0.50 to 2 wt% in pure aluminium matrix. The composites fabrication was done through stir casting technique, and the investigations revealed that pure Al–0.5% GNPs composite displayed better mechanical properties in comparison with pure Al–1% GNPs, 1.5% GNPs and 2% GNPs composites for tensile strength and hardness test. The SEM, fractographic analysis, XRD and TEM analyses were examined to investigate the surface morphology, and phase analysis confirms that there is a uniform distribution of GNPs in the base matrix (pure Al) and results in low porosity. This leads to a considerable improvement in the mechanical properties of pure Al–0.5% GNPs compared to other weight percentages due to high surface area and curled nature of graphene and makes it potential for diverse applications.


Pure Al–GNPs Composites Stir casting Tensile strength Hardness Impact strength 


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Copyright information

© The Institution of Engineers (India) 2018

Authors and Affiliations

  • Venkata Subbaiah
    • 1
    Email author
  • Bhanu Palampalle
    • 1
  • K. Brahmaraju
    • 2
  1. 1.Andhra University College of EngineeringVisakhapatnamIndia
  2. 2.Sagi Ramakrishnam Raju Engineering CollegeBhimavaramIndia

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