Development And Characterization of Al6061/Sic/Bagasse Fly Ash/Aloe Vera Ash Hybrid Composite as An Alternative Material for Drum Break Application
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Date
2023-07
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Addis Ababa University
Abstract
Composite materials, which have low densities, are used for automotive body parts and structural functions, leading to high strength-to-weight ratios and high stiffness-to-weight ratios compared to other conventional materials. Most engineering applications nowadays in industry, such as, aerospace, automotive body parts, propellers, and manufacturing turbine blades, require better mechanical properties of material. To meet these requirements, metal matrix composite offers certain top mechanical properties such as higher transverse strength and stiffness, superior shear strength, wear resistance and compressive strength, and superior high temperature performance than other polymer and ceramic composites characteristics. This work aims to develop and evaluate Al matrix composites with better performance using low-cost reinforcements from industrial wastes and agricultural products. Fabrication and experimental study of mechanical properties of aluminum matrix (Al6061/SiC) composites the weight % of reinforcement was evaluated and compared. Al6061 matrix hybrid composites were prepared by stir casting at 700 °C and at 600 rpm of stir rotation.
The parameters were used to develop the Al6061/SiC bagasse fly-ash and aloe-vera ash hybrid composite are chemical composition of reinforcements, weighted requirements for matrix and reinforcements, powder mixing, and stirring the slurry at 600 rpm for 10 minutes. Compression strength testing (ASTM Standard E9), wear resistance of samples using (ASTM G99 standards, and impact strength testing (ASTM E-23) had been conducted to characterize the developed composite.
The results showed that the compression strength slightly increased with bagasse ash and aloe vera ash content. The maximum compression strength achieved in sample 6 (Al6061-10% SiC, 9% bagasse ash, and 11% Aloe vera ash) is 376.3 MP, and the average value is 376.3 MP. A low average value of wear (in microns) has been found in sample 6 (Al6061-10 %SiC-9% bagasse ash - 11 % Aloe vera ash), and the value is gained at 64.8 microns, this shows more wear resistance in the composite sample as compared to other samples. The impact test result shows that samples gives better energy absorbed which is 4.79J.
Therefore, industrial waste, bagasse ash and agricultural product like alovera can enhance mechanical properties which mean hybrid composites had better properties than single-reinforced composites. Therefore, Al 6061/SiC with bagasse and alovera ash composite is suitable for applications where less density with high yield strength and hardness are predominantly required for drum brake application.
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Aluminum matrix, metal matrix composite, bagasse ash, alovera ash, mechanical characterization, microstructure