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<p>A novel Al-5&#xa0;wt.% TiB<sub>2</sub> composite with 21&#xa0;wt.% AlCuFeMn multicomponent alloy as secondary reinforcement is fabricated using the powder metallurgy route. Subsequently, the microstructure, indentation, and corrosion properties of the composite are investigated. The prepared composite sintered at 550&#xa0;°C in air, retains the principal phases besides a minor phase analogous to AlFeO<sub>3</sub>. The as-sintered composite’s hardness is ~ 106&#xa0;HV, which is ~ 20-30 % higher as compared to aluminum reinforced with 10&#xa0;wt.% TiB<sub>2</sub> or SiC and ~ 18% higher than AA5083 alloy. The hybrid composite undergoes uniform corrosion with a comparable or improved corrosion resistance when compared with commercially available AA5083 alloy, Al-5&#xa0;wt.% TiB<sub>2</sub>, and SiC composites. Further, the composite does not undergo pitting corrosion due to the protective oxide film formed and the non-conductive nature of TiB<sub>2</sub> particles. Moreover, the addition of the AlCuFeMn alloy particles does not hinder the passive layer on the surface of the composite.</p>

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Investigation on Corrosion and Indentation Behavior of a Novel Al-TiB2 -AlCuFeMn Composite

  • 期刊论文

  • 发表日期：

    2025年6月18日

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  • Ritukesh Sharma,
  • Dhiman Kumar Mahata,
  • Amritendu Roy,
  • Partha Sarathi De,
  • Avanish Kumar

摘要

A novel Al-5 wt.% TiB2 composite with 21 wt.% AlCuFeMn multicomponent alloy as secondary reinforcement is fabricated using the powder metallurgy route. Subsequently, the microstructure, indentation, and corrosion properties of the composite are investigated. The prepared composite sintered at 550 °C in air, retains the principal phases besides a minor phase analogous to AlFeO3. The as-sintered composite’s hardness is ~ 106 HV, which is ~ 20-30 % higher as compared to aluminum reinforced with 10 wt.% TiB2 or SiC and ~ 18% higher than AA5083 alloy. The hybrid composite undergoes uniform corrosion with a comparable or improved corrosion resistance when compared with commercially available AA5083 alloy, Al-5 wt.% TiB2, and SiC composites. Further, the composite does not undergo pitting corrosion due to the protective oxide film formed and the non-conductive nature of TiB2 particles. Moreover, the addition of the AlCuFeMn alloy particles does not hinder the passive layer on the surface of the composite.