Fabrication and characterization of GNPs and CNTs reinforced Al7075 matrix composites through the stir casting process

Siavash Imanian Ghazanlou; Beitallah Eghbali

doi:10.1007/s12613-020-2101-5

Volume 28 Issue 7

Jul. 2021

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2021 > 28(7): 1204-1214

Siavash Imanian Ghazanlou and Beitallah Eghbali, Fabrication and characterization of GNPs and CNTs reinforced Al7075 matrix composites through the stir casting process, Int. J. Miner. Metall. Mater., 28(2021), No. 7, pp. 1204-1214. https://doi.org/10.1007/s12613-020-2101-5

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Siavash Imanian Ghazanlou and Beitallah Eghbali, Fabrication and characterization of GNPs and CNTs reinforced Al7075 matrix composites through the stir casting process, Int. J. Miner. Metall. Mater., 28(2021), No. 7, pp. 1204-1214. https://doi.org/10.1007/s12613-020-2101-5

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Research Article

Fabrication and characterization of GNPs and CNTs reinforced Al7075 matrix composites through the stir casting process

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Corresponding author:
Beitallah Eghbali E-mail: eghbali@sut.ac.ir
Received: 30 December 2019; Revised: 12 May 2020; Accepted: 14 May 2020; Available online: 17 May 2020

Abstract

Abstract

This study investigated the effects of adding graphene nanoplates (GNPs) and carbon nanotubes (CNTs) into the Al7075 matrix via the stir casting method on the microstructure and mechanical properties of the fabricated composites. By increasing the volume fraction of reinforcements, the fraction of porosity increased. The X-ray diffraction results showed that the addition of reinforcements into the Al7075 changed the dominant crystal orientation from (002) to (111). Field emission scanning electron microscopy images also showed the distribution of clustered reinforcements in the matrix. Between the two reinforcements, the addition of CNTs generated a lower fraction of porosities. Through the addition of 0.52vol% GNPs into the matrix, the hardness, ultimate tensile strength and uniform elongation increased by 44%, 32%, and 180%, respectively. Meanwhile, the presence of 0.71vol% CNTs in the matrix increased the hardness, tensile strength and uniform elongation by 108%, 129%, and 260%, respectively.
- Al7075;
- GNPs;
- CNTs;
- stir casting;
- composite

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