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Abstract <p>In this study, an Al7075 matrix composite reinforced with nano-sized fly ash (FA) and cenosphere (CS), a waste product from thermal power plants, was fabricated using an ultrasonic cavitation-assisted stir casting method. These nanoparticles were added at amounts of 0.6, 1.2, and 1.8 weight percent. Microstructural inspection using scanning electron microscopy (SEM) was conducted to verify the dispersion of particles in the composite. The tensile strength, compressive strength, and hardness of the composite were determined through mechanical characterization. Results depict that, for the Al7075/FA<sub>1.8</sub> composite, the ultimate tensile strength, ultimate compressive strength, and hardness values have improved by 47, 26, and 30%, respectively, compared to the AL7075 alloy. For Al7075/CS<sub>1.8</sub>, the composite ultimate tensile strength, ultimate compressive strength, and hardness value have been improved by 59, 34, and 37%, respectively, compared to the Al7075 alloy. A sliding wear test assesses the wear characteristics of the composite. In comparison to the Al7075 alloy, a maximum improvement of 63% in wear rate has been reported for the Al7075/FA<sub>1.8</sub> composite. Moreover, a maximum improvement of 72% has been observed for the Al7075/CS<sub>1.8</sub> composites compared to the Al7075 alloy.</p>

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Mechanical Properties and Sliding Wear Characterization of Al7075 Composites Reinforced with Industrial Waste Nanoparticles (Fly Ash and Cenosphere), Fabricated via an Ultrasonic-Assisted Stir Casting Process

  • 期刊论文

  • 发表日期：

    2025年8月1日

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  • Sunil Setia,
  • Sant Ram Chauhan

摘要

Abstract

In this study, an Al7075 matrix composite reinforced with nano-sized fly ash (FA) and cenosphere (CS), a waste product from thermal power plants, was fabricated using an ultrasonic cavitation-assisted stir casting method. These nanoparticles were added at amounts of 0.6, 1.2, and 1.8 weight percent. Microstructural inspection using scanning electron microscopy (SEM) was conducted to verify the dispersion of particles in the composite. The tensile strength, compressive strength, and hardness of the composite were determined through mechanical characterization. Results depict that, for the Al7075/FA1.8 composite, the ultimate tensile strength, ultimate compressive strength, and hardness values have improved by 47, 26, and 30%, respectively, compared to the AL7075 alloy. For Al7075/CS1.8, the composite ultimate tensile strength, ultimate compressive strength, and hardness value have been improved by 59, 34, and 37%, respectively, compared to the Al7075 alloy. A sliding wear test assesses the wear characteristics of the composite. In comparison to the Al7075 alloy, a maximum improvement of 63% in wear rate has been reported for the Al7075/FA1.8 composite. Moreover, a maximum improvement of 72% has been observed for the Al7075/CS1.8 composites compared to the Al7075 alloy.