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<p>This investigation of nano alumina (5 wt%-Al<sub>2</sub>O<sub>3</sub>) is merging with aluminium alloy (AA7075) and titanium diboride (0–6 wt%-TiB<sub>2</sub>) through a semisolid die-cast. The AA7075 alloys hybrid nanocomposite characteristics like surface morphology and physical and mechanical properties are evaluated and summarize the contribution of Al<sub>2</sub>O<sub>3</sub>/TiB<sub>2</sub>. The surface morphology analysis proved their structures own Al<sub>2</sub>O<sub>3</sub>/TiB<sub>2</sub> fine grains with even particle dispersion. The composite density is progressively hiked, which is exploited to obey the rule of mixture. The percentage of porosity varied from 0.83 to 1.07 %, and the composite with 5 wt% TiB<sub>2</sub> and 6 wt% Al<sub>2</sub>O<sub>3</sub> composite’s ultimate tensile strength and impact toughness increased by 55.7 and 37 % related to the unreinforced composite sample. The effective processing leads to an increase the particle dispersion as opposed to the maximum resistance to indentation behaviour (102 HV). Besides, the contribution of ceramic particles influences lower elongation behaviour.</p>

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Semisolid stir casting and effect of hybrid fillers on functional properties of aluminium alloy composites

  • 期刊论文

  • 发表日期：

    2025年7月1日

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  • R. Venkatesh,
  • Aman Sharma,
  • Nagabhooshanam Nagarajan,
  • Mohanavel Vinayagam,
  • Manzoore Elahi M. Soudagar,
  • Sami Al Obaid,
  • Tahani Awad Alahmadi

摘要

This investigation of nano alumina (5 wt%-Al2O3) is merging with aluminium alloy (AA7075) and titanium diboride (0–6 wt%-TiB2) through a semisolid die-cast. The AA7075 alloys hybrid nanocomposite characteristics like surface morphology and physical and mechanical properties are evaluated and summarize the contribution of Al2O3/TiB2. The surface morphology analysis proved their structures own Al2O3/TiB2 fine grains with even particle dispersion. The composite density is progressively hiked, which is exploited to obey the rule of mixture. The percentage of porosity varied from 0.83 to 1.07 %, and the composite with 5 wt% TiB2 and 6 wt% Al2O3 composite’s ultimate tensile strength and impact toughness increased by 55.7 and 37 % related to the unreinforced composite sample. The effective processing leads to an increase the particle dispersion as opposed to the maximum resistance to indentation behaviour (102 HV). Besides, the contribution of ceramic particles influences lower elongation behaviour.