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Research Article

Influence of SiO2 and nano graphene particles on the microstructure and mechanical behavior of A356 alloy metal composites

Samuel Dayanand1, S Manjunath Yadav1, Madeva Nagaral2, Satish Babu Boppana3, Manjunatha T H4, V Auradi5

1Dept. of Mechanical Engineering, Government Engineering College, Karnataka, India
2Aircraft Research and Design Centre, Hindustan Aeronautics Limited, Karnataka, India
3Dept. of Mechanical Eng., School of Eng. College, Presidency University, Karnataka, India
4Dept. of Mechanical Eng., Ballari Institute of Technology and Management, Karnataka, India
5Department of Mechanical Engineering, Siddaganga Institute of Technology, Karnataka, India

Keywords

Abstract


A356 alloy;    

Metal matrix composite; 

 Stir casting; 

Tensile properties;

 Silicon oxide;

 Graphene




The current research focuses on investigating the microstructural and mechanical properties of aluminum (Al) metal matrix composites (MMCs) reinforced with both silicon dioxide (SiO2) and nano-graphene particles. The composite material was produced using a novel two stage stir cast metallurgy approach. In this study, a constant reinforcement of 1 wt. % nanographene was maintained, while the SiO2 content was independently varied at levels of 2.5, 5, and 7.5 wt. %. Employing scanning electron microscopy (SEM) tool, microstructural analyses were conducted, revealing a uniform dispersion of ceramic silicon dioxide (SiO2) and graphene particles within the as-cast A356 MMCs. Mechanical testing, following the ASTM standards, was carried out on the composites, specifically assessing tensile strength, yield strength, and percentage elongation to evaluate the properties of the Al-based MMCs. The findings of this study indicate a significant enhancement in both tensile and yield strength values for the fabricated composites by 60.64% and 82.78% respectively. However, it is important to note that the percentage elongation decreases as the reinforcement content in the composite increases.

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LATEST AWARDS


2023 Reviewer Awards:

Please, visit Reviewer Awards section for the winners of the 2022 RESM reviewer awards.



2023 Best Paper Award:

The paper authored by Ferzan Fidan, Naim Aslan, Mümin Mehmet Koç entitled as “Morpho-structural and compressive mechanical properties of graphene oxide reinforced hydroxyapatite scaffolds for bone tissue applications” is awarded.



2023 Most Cited Paper Award:

The paper authored by Ercan Işık, Ehsan Harirchian, Hüseyin Bilgin, Kirti Jadhav entitled as “The effect of material strength and discontinuity in RC structures according to different site-specific design spectra" is awarded.


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