THE COMPARISON OF NANO-AL2O3 VS GRAPHENE ADDITIVES FOR THE REINFORCEMENT OF ALUMINUM MATRIX COMPOSITE

Authors : Uğur AYBARÇ, Mozgur SEYDİBEYOGLU

Pages : 67-78

View : 111 | Download : 14

Publication Date : 2021-06-30

Article Type : Research Paper

Abstract :Composite materials have been used to replace many conventional materials because of high mechanical strength and lighter weight since several decades. In general, scientists are preparing metal matrix composites with 1 additive at different weight ratios. However, comparison of the effect of different reinforcements such as nano alumina insert ignore into journalissuearticles values(n-Al2O3); and graphene with metal casting is not studied before. In this paper, Al-7Si-0.3Mg aluminum alloy known as A356 was used as matrix material and different fractions of n-Al2O3 insert ignore into journalissuearticles values(0.5, 1 and 1.5 wt %); and graphene insert ignore into journalissuearticles values(0.075, 0.15 and 0.25 wt %); were used as reinforcements. Our novel hybrid stirring insert ignore into journalissuearticles values(mechanical and ultrasonic); was applied to produce samples with homogeneous distribution of additives and all the samples were subjected T6 heat treatment. Uniaxial tensile test was applied to determine the mechanical properties and quality index insert ignore into journalissuearticles values(QI); was calculated by using these results. The results showed that higher yield strength insert ignore into journalissuearticles values(YS); and ultimate tensile strength insert ignore into journalissuearticles values(UTS); values were obtained with 0.5 wt % Al2O3 addition and with 0.25 wt % graphene addition when compared to the reference sample. In comparison to the reference sample, UTS values increased 8.5% and 5.0% with adding n-Al2O3 and graphene, respectively. Likewise, QI values also increased as nearly 20.0% and 13.9% with adding n-Al2O3 and graphene, respectively.
Keywords : Aluminum metal matrix composites AMMC, metal matrix composite, nano alumina, graphene

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