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<p>This work examines the impact of nanoparticle reinforcement on the friction stir welding of the AA7075 aluminum alloy. Aluminium oxide and graphite nanoparticles were integrated at the faying surfaces of the sheets before welding. The welding was performed with a tool rotational speed of 1400&#xa0;rpm, a tool traverse speed of 50&#xa0;mm/min, and a tilt angle of 2 degrees to produce defect-free joints. The samples were assessed for mechanical, microstructural, and tribological characteristics. The hybrid-reinforced joint had a maximum tensile strength of 160.36&#xa0;MPa, while the graphite reinforcement had the lowest strength at 62.75&#xa0;MPa. Microstructural analysis revealed uniform distribution of reinforcement particles with finer grain structure in the stir zone compared to the non-reinforced FSW joint. The combination of Al<sub>2</sub>O<sub>3</sub> and graphite nanoparticles enhanced the overall wear resistance of the material. The study demonstrates the potential for novel composite joints with improved microstructural, mechanical, and tribological properties in aerospace applications.</p>

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Experimental investigations on friction stir welded AA7075 aluminium alloys reinforced with Al2O3 and graphite nanoparticles

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年1月10日

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  • MD Sameer,
  • Anil Kumar Birru

摘要

This work examines the impact of nanoparticle reinforcement on the friction stir welding of the AA7075 aluminum alloy. Aluminium oxide and graphite nanoparticles were integrated at the faying surfaces of the sheets before welding. The welding was performed with a tool rotational speed of 1400 rpm, a tool traverse speed of 50 mm/min, and a tilt angle of 2 degrees to produce defect-free joints. The samples were assessed for mechanical, microstructural, and tribological characteristics. The hybrid-reinforced joint had a maximum tensile strength of 160.36 MPa, while the graphite reinforcement had the lowest strength at 62.75 MPa. Microstructural analysis revealed uniform distribution of reinforcement particles with finer grain structure in the stir zone compared to the non-reinforced FSW joint. The combination of Al2O3 and graphite nanoparticles enhanced the overall wear resistance of the material. The study demonstrates the potential for novel composite joints with improved microstructural, mechanical, and tribological properties in aerospace applications.