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<p>Composite specimens of A356 with 4 wt.% B<sub>4</sub>C, A356 with 4 wt.% Gr composites, A356 with 4 wt.% Gr with 4 wt. % B<sub>4</sub>C, A356-4 wt.% Gr with 8 wt. % B<sub>4</sub>C, and A356-4 wt.% Gr with 12 wt. % B<sub>4</sub>C hybrid composites were manufactured using an innovative two-step stir cast technique. SEM microscopy was used to examine the microstructure of the created test samples. Furthermore, the wear performance of the specimens was examined using pin-on-disc wear testing equipment made by DUCOM. Afterward, the worn surfaces were subjected to microstructural examination. The composites’ densities were determined using the rule of mixture and weight technique. The hardness of the produced composites was evaluated using the ASTM E10 standard. Sliding distance, variable loads of 1&#xa0;kg, 2&#xa0;kg, and 3&#xa0;kg, and sliding velocities of 100&#xa0;rpm, 200&#xa0;rpm, and 300&#xa0;rpm are the wear characteristics used in the testing method. Wear resistance was best for A356 mixed with 4 wt.% of Gr and 12 wt. % B<sub>4</sub>C hybrid composites, as compared to A356 and its composites. By incorporating graphite and B<sub>4</sub>C particles into the A356 alloy, its density was reduced while its hardness was enhanced.</p>

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Synergistic Effect of Graphite and B4C Particles on Enhancing the Hardness and Wear Characteristics of A356 Alloy Composites

  • 期刊论文

  • 发表日期：

    2025年9月8日

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  • Pankaj R. Jadhav,
  • Sunil Kumar Shetty,
  • B. K. Naveen Kumar,
  • Madeva Nagaral,
  • Udaya Devadiga,
  • V. Auradi,
  • S. Shashidhar

摘要

Composite specimens of A356 with 4 wt.% B4C, A356 with 4 wt.% Gr composites, A356 with 4 wt.% Gr with 4 wt. % B4C, A356-4 wt.% Gr with 8 wt. % B4C, and A356-4 wt.% Gr with 12 wt. % B4C hybrid composites were manufactured using an innovative two-step stir cast technique. SEM microscopy was used to examine the microstructure of the created test samples. Furthermore, the wear performance of the specimens was examined using pin-on-disc wear testing equipment made by DUCOM. Afterward, the worn surfaces were subjected to microstructural examination. The composites’ densities were determined using the rule of mixture and weight technique. The hardness of the produced composites was evaluated using the ASTM E10 standard. Sliding distance, variable loads of 1 kg, 2 kg, and 3 kg, and sliding velocities of 100 rpm, 200 rpm, and 300 rpm are the wear characteristics used in the testing method. Wear resistance was best for A356 mixed with 4 wt.% of Gr and 12 wt. % B4C hybrid composites, as compared to A356 and its composites. By incorporating graphite and B4C particles into the A356 alloy, its density was reduced while its hardness was enhanced.