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<p>The main objectives of this research are to enhance the wettability, attain a homogenous particle distribution and enrich the mechanical properties of AZ61 alloy hybrid nanocomposite composed of the 2 wt% of titanium dioxide (TiO<sub>2</sub>) and 1–3 wt% of alumina (Al<sub>2</sub>O<sub>3</sub>) nanoparticles via stir casting with ultrasonic treatment. The effect of the wettability agent (1 % calcium) and ultrasonic treatment on the microstructural behaviour was analyzed using transmission electron microscopy. The hybrid fillers were found to be homogeneously distributed, leading to enhanced mechanical properties and reduced porosity. The AZ61/2 wt% TiO<sub>2</sub>/3 wt% Al<sub>2</sub>O<sub>3</sub> hybrid nanocomposite facilitated better impact toughness (13.2 J/mm<sup>2</sup>), optimum microhardness value (104 HV), superior yield and tensile strength (204 and 320 MPa), marginal reduction in elongation (5 %), and lowest porosity percentage (0.51 %), which is better than the monolithic AZ61 alloy and AZ61/2 wt% TiO<sub>2</sub> composites. This AZ61/2 wt% TiO<sub>2</sub>/3 wt% Al<sub>2</sub>O<sub>3</sub> hybrid nanocomposite is proposed for automotive structural applications.</p>

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Titanium dioxide/alumina nanoparticles on microstructural and mechanical properties of AZ61 alloy composites

  • 期刊论文

  • 发表日期：

    2026年2月9日

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  • M. Aruna,
  • N. Nagabhooshanam,
  • Prahalad Singh Parihar,
  • Navin Kedia,
  • Jemmy Christy H.,
  • G. Satya,
  • Ramya Maranan,
  • M. Murali,
  • S. Sathiyamurthy

摘要

The main objectives of this research are to enhance the wettability, attain a homogenous particle distribution and enrich the mechanical properties of AZ61 alloy hybrid nanocomposite composed of the 2 wt% of titanium dioxide (TiO2) and 1–3 wt% of alumina (Al2O3) nanoparticles via stir casting with ultrasonic treatment. The effect of the wettability agent (1 % calcium) and ultrasonic treatment on the microstructural behaviour was analyzed using transmission electron microscopy. The hybrid fillers were found to be homogeneously distributed, leading to enhanced mechanical properties and reduced porosity. The AZ61/2 wt% TiO2/3 wt% Al2O3 hybrid nanocomposite facilitated better impact toughness (13.2 J/mm2), optimum microhardness value (104 HV), superior yield and tensile strength (204 and 320 MPa), marginal reduction in elongation (5 %), and lowest porosity percentage (0.51 %), which is better than the monolithic AZ61 alloy and AZ61/2 wt% TiO2 composites. This AZ61/2 wt% TiO2/3 wt% Al2O3 hybrid nanocomposite is proposed for automotive structural applications.