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<p>In comparison to other metal matrix composites, aluminium reinforced composites have a number of advantages that have led to its widespread use. These advantages include improved mechanical qualities, lower densities, favourable thermal behaviour, and ease of manufacture. This work investigates the microstructure and mechanical properties of Al2024-Boron Carbide (B<sub>4</sub>C) composites having B<sub>4</sub>C contents ranging between 5 to 15%. Manufacturing of the composites was accomplished by the use of the stir cast method. The produced composite’s were exposed to 2&#xa0;h of furnace heat-treatment at 530&#xa0;°C followed by quenching in air and finally subjected to artificial aging for 6&#xa0;h at a temperature of 175&#xa0;°C. SEM was used to examine the microscopic structure of the synthesized composites. The UTS, compressive strength, percentage elongation, hardness and impact tests are carried out for mechanical characterization of the composites. SEM micrographs indicated even distribution of reinforcing particles in aluminium alloy matrix. The incorporation of reinforcing particles resulted in a significant increase in the UTS, compressive strength, BHN and impact energy of the Al2024 matrix. The Al2024-15%B<sub>4</sub>C composite exhibited maximum increase in mechanical properties, with UTS of 281&#xa0;N/mm<sup>2</sup>, compressive strength of 676&#xa0;N/mm<sup>2</sup>, hardness of 115 BHN and impact energy of 14&#xa0;J. Compared to the Al2024 matrix, this composite demonstrated an increase of 32.55% in UTS, 24.04% in compressive strength, 17.35% in hardness and 75% in impact energy. However, with a percentage elongation of 7.8&#xa0;mm, the composite shows 42.22% decrease in ductility compared to the Al2024 matrix. The casted composites finds in application in automotive sectors.</p>

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Production, Microstructure Study and Mechanical Characterization of Stir Casted Aluminium Alloy-Boron Carbide Composites for Automotive Sectors

  • 期刊论文

  • 发表日期：

    2026年3月31日

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  • R. Vijaya Kumar,
  • G. Padmavathi,
  • Md. Abdul Raheem Junaidi,
  • B. N. Deepak Kumar,
  • S. Sreenivas,
  • M. Thanuj Kumar,
  • S. Udayashankar,
  • Subash Acharya,
  • M. M. Venugopal,
  • T. A. Sudarshan

摘要

In comparison to other metal matrix composites, aluminium reinforced composites have a number of advantages that have led to its widespread use. These advantages include improved mechanical qualities, lower densities, favourable thermal behaviour, and ease of manufacture. This work investigates the microstructure and mechanical properties of Al2024-Boron Carbide (B4C) composites having B4C contents ranging between 5 to 15%. Manufacturing of the composites was accomplished by the use of the stir cast method. The produced composite’s were exposed to 2 h of furnace heat-treatment at 530 °C followed by quenching in air and finally subjected to artificial aging for 6 h at a temperature of 175 °C. SEM was used to examine the microscopic structure of the synthesized composites. The UTS, compressive strength, percentage elongation, hardness and impact tests are carried out for mechanical characterization of the composites. SEM micrographs indicated even distribution of reinforcing particles in aluminium alloy matrix. The incorporation of reinforcing particles resulted in a significant increase in the UTS, compressive strength, BHN and impact energy of the Al2024 matrix. The Al2024-15%B4C composite exhibited maximum increase in mechanical properties, with UTS of 281 N/mm2, compressive strength of 676 N/mm2, hardness of 115 BHN and impact energy of 14 J. Compared to the Al2024 matrix, this composite demonstrated an increase of 32.55% in UTS, 24.04% in compressive strength, 17.35% in hardness and 75% in impact energy. However, with a percentage elongation of 7.8 mm, the composite shows 42.22% decrease in ductility compared to the Al2024 matrix. The casted composites finds in application in automotive sectors.