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<p>This research examines the influence of varying reinforcement particle and weight fractions on the microstructure, mechanical properties, and tribological response of aluminium hybrid composites produced via stir casting. Reinforcement materials, TiB<sub>2</sub> and Al<sub>2</sub>O<sub>3</sub>, were incorporated in weight fractions ranging from 1 to 3%. After fabrication, the composites underwent an optimised T-6 heat treatment process. Scanning electron- microscopy (SEM) and X-ray diffraction (XRD) were utilised for metallographic characterisation. The Mechanical properties such as tensile strength, hardness, and impact resistance were examined to evaluate the load-bearing performance of the composites. Heat-treated samples exhibited a 25–40% enhancement in properties compared to as-cast samples. Dry sliding wear tests, conducted using a pin-on-disc apparatus at a constant load of 20 N and a sliding speed of 300&#xa0;rpm, revealed the significant role of reinforcement particles in improving wear resistance. SEM analysis of the worn surfaces provided detailed insights into the wear mechanisms. Among the samples, the composite with 1.5% TiB<sub>2</sub> and 1.5% Al<sub>2</sub>O<sub>3</sub> showed superior mechanical and wear performance. These results emphasise the synergistic effects of reinforcement combinations and weight fractions, offering practical insights for optimising hybrid composites for engineering applications.</p>

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Effect of Ceramic Contents and Heat Treatment on Metallurgical and Mechanical Behaviour of Al-6082/TiB2/Al2O3 Hybrid Composites

  • 期刊论文

  • 发表日期：

    2025年9月25日

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  • Pushpraj Singh,
  • Anil Kumar Das,
  • Raj Kumar Singh

摘要

This research examines the influence of varying reinforcement particle and weight fractions on the microstructure, mechanical properties, and tribological response of aluminium hybrid composites produced via stir casting. Reinforcement materials, TiB2 and Al2O3, were incorporated in weight fractions ranging from 1 to 3%. After fabrication, the composites underwent an optimised T-6 heat treatment process. Scanning electron- microscopy (SEM) and X-ray diffraction (XRD) were utilised for metallographic characterisation. The Mechanical properties such as tensile strength, hardness, and impact resistance were examined to evaluate the load-bearing performance of the composites. Heat-treated samples exhibited a 25–40% enhancement in properties compared to as-cast samples. Dry sliding wear tests, conducted using a pin-on-disc apparatus at a constant load of 20 N and a sliding speed of 300 rpm, revealed the significant role of reinforcement particles in improving wear resistance. SEM analysis of the worn surfaces provided detailed insights into the wear mechanisms. Among the samples, the composite with 1.5% TiB2 and 1.5% Al2O3 showed superior mechanical and wear performance. These results emphasise the synergistic effects of reinforcement combinations and weight fractions, offering practical insights for optimising hybrid composites for engineering applications.