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<p>Aluminium due to its lightweight and high strength make it vital in aerospace and automotive sectors. AA8011 alloy, known for its formability and corrosion resistance, is further enhanced in this study by incorporating nano-sized boron carbide (B<sub>4</sub>C) and carbon nanotubes (CNT). Composites with varying wt% of nano B<sub>4</sub>C (0, 0.4, 0.8, 1.2) and CNT (0, 0.3, 0.6, 0.9) were fabricated using electromagnetic stir casting to ensure uniform dispersion. XRD confirmed the successful incorporation of reinforcements without interfacial reactions. Tensile tests were conducted using ASTM E8 standards on a Tinius Olsen UTM with real-time acoustic emission (AE) monitoring. Scanning electron microscopy (SEM) analysis revealed ductile-to-brittle transition with increasing B<sub>4</sub>C, while CNTs promoted crack bridging and toughness. Results highlights the synergistic effect of nano B<sub>4</sub>C and CNTs in improving the mechanical performance of AA8011, validated by AE-based real-time failure diagnostics.</p>

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Online acoustic emissions for realtime tensile strength evaluation of stir-cast AA8011-nano B4C - CNT hybrid composites

  • 期刊论文

  • 发表日期：

    2026年2月9日

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  • J. Arun,
  • T. G. Ansalam Raj,
  • K. E. Reby Roy,
  • S. Suresh

摘要

Aluminium due to its lightweight and high strength make it vital in aerospace and automotive sectors. AA8011 alloy, known for its formability and corrosion resistance, is further enhanced in this study by incorporating nano-sized boron carbide (B4C) and carbon nanotubes (CNT). Composites with varying wt% of nano B4C (0, 0.4, 0.8, 1.2) and CNT (0, 0.3, 0.6, 0.9) were fabricated using electromagnetic stir casting to ensure uniform dispersion. XRD confirmed the successful incorporation of reinforcements without interfacial reactions. Tensile tests were conducted using ASTM E8 standards on a Tinius Olsen UTM with real-time acoustic emission (AE) monitoring. Scanning electron microscopy (SEM) analysis revealed ductile-to-brittle transition with increasing B4C, while CNTs promoted crack bridging and toughness. Results highlights the synergistic effect of nano B4C and CNTs in improving the mechanical performance of AA8011, validated by AE-based real-time failure diagnostics.