Effect of graphene addition on microstructure and mechanical properties of cast aluminium alloy composite

Salleh, Mohd Shukor and Abd Rahim, Mohammad Na’aim and Yahaya, Saifudin Hafiz and Subramonian, Sivarao and Liew, Pay Jun and Abdul Rashid, Azrin Hani and Syed Ahmad, Syarifah Nur Aqida and Al-Zubaidi, Salah Salman (2024) Effect of graphene addition on microstructure and mechanical properties of cast aluminium alloy composite. Journal of Advanced Research in Micro and Nano Engineering, 25 (1). pp. 66-75. ISSN 2756-8210

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Abstract

Aluminium-reinforced metal matrix composites (Al-MMCs) are highly desirable because of their low density, excellent corrosion resistance, high thermal and electrical conductivity, high strength, and stiffness. This research intends to improve the mechanical properties of Al-MMCs for lightweight automotive and aerospace applications. A Taguchi method with two parameters and four levels was used to determine the optimum amounts of graphene nanoplatelets (GNPs) (0.1, 0.25, 0.5, and 0.6 wt%) and stirring duration (1, 2, 4, and 8 minutes). GNPs were added to the molten aluminium alloys through the stir-casting process to enhance the mechanical properties of the Al-MMCs. The results revealed that the Al-MMCs with 0.25 wt% GNPs and 8 minutes of stirring time produced the highest value of hardness and tensile properties. Under these parameters, the microstructure changed from dendritic to rosette, which had a tremendous effect on the improvement of the mechanical properties. The Ultimate Tensile Strength (UTS) and Yield Strength (YS) of the samples were improved after T6 heat treatment with a value of 210.26 MPa and 145.31 MPa, respectively, and the hardness was 116 HV while the elongation to fracture was 4.89%.The results showed that the high GNP concentration improved the mechanical properties of the Al-MMCs.

Item Type: Article
Uncontrolled Keywords: Graphene nanoplatelets, Semi-solid processing, Nano filler, Aluminiummatrix composite
Divisions: Faculty Of Industrial And Manufacturing Technology And Engineering
Depositing User: Norfaradilla Idayu Ab. Ghafar
Date Deposited: 05 Jun 2025 14:14
Last Modified: 05 Jun 2025 14:14
URI: http://eprints.utem.edu.my/id/eprint/28715
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