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<p>Aluminium alloy (Al6061) is widely used in automotive applications. Its performance can be enhanced by incorporating nano-ceramic particles through the stir casting process. However, this technique often leads to challenges such as porosity, poor wettability, and particle agglomeration, which ultimately degrade the overall behaviour of the composite. This research aims to overcome the limitations above by enhancing the functional properties of Al6061 alloy composites through the addition of 1 wt% magnesium fluoride (MgF<sub>2</sub>) and varying weight percentages of nanographene, processed via a vacuum-assisted stir casting technique. The influences of composite processing on the microstructural, grain size, physical, mechanical, and wear behaviour of Al6061 alloy and its composite made with nanographene particles are investigated. Transmission Electron Microscopy (TEM) revealed an agglomeration-free structure with an even distribution of nanographene particles and fine grain boundaries, characterized by a reduced grain size of 15 µm and a porosity percentage of 0.5%. The addition of 5 wt% nanographene and 1% magnesium fluoride to Al6061 resulted in the highest tensile strength (358 MPa), high resistance to indentation (hardness) behaviour of 112 HV, and high-impact strength (14.2 J/mm<sup>2</sup>). The wear studies revealed that the composite made with 5 wt% graphene nanoparticles facilitated a low wear rate (3.1&#xa0;×&#xa0;10<sup>−3</sup> mm<sup>3</sup>/Nm) and increased COF (0.52). This composite sample (Al6061/5 wt% nanographene) is the scope for automotive actuator gears and structural components applications.</p>

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Magnesium Fluoride Processing and Effect of Nanographene on Functional Characteristics of Aluminium Alloy Nanocomposites

  • 期刊论文

  • 发表日期：

    2025年7月8日

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  • M. Subashree,
  • Pradeep Kumar Singh,
  • T. Sudhakar,
  • Vinayagam Mohanavel,
  • K. Mrudula Devi,
  • R. Srinivasan,
  • S. Sathiyamurthy,
  • Manzoore Elahi M. Soudagar,
  • A. H. Seikh

摘要

Aluminium alloy (Al6061) is widely used in automotive applications. Its performance can be enhanced by incorporating nano-ceramic particles through the stir casting process. However, this technique often leads to challenges such as porosity, poor wettability, and particle agglomeration, which ultimately degrade the overall behaviour of the composite. This research aims to overcome the limitations above by enhancing the functional properties of Al6061 alloy composites through the addition of 1 wt% magnesium fluoride (MgF2) and varying weight percentages of nanographene, processed via a vacuum-assisted stir casting technique. The influences of composite processing on the microstructural, grain size, physical, mechanical, and wear behaviour of Al6061 alloy and its composite made with nanographene particles are investigated. Transmission Electron Microscopy (TEM) revealed an agglomeration-free structure with an even distribution of nanographene particles and fine grain boundaries, characterized by a reduced grain size of 15 µm and a porosity percentage of 0.5%. The addition of 5 wt% nanographene and 1% magnesium fluoride to Al6061 resulted in the highest tensile strength (358 MPa), high resistance to indentation (hardness) behaviour of 112 HV, and high-impact strength (14.2 J/mm2). The wear studies revealed that the composite made with 5 wt% graphene nanoparticles facilitated a low wear rate (3.1 × 10−3 mm3/Nm) and increased COF (0.52). This composite sample (Al6061/5 wt% nanographene) is the scope for automotive actuator gears and structural components applications.