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<p>​ Aluminum hybrid composites are gaining prominence over monolithic-material options due to their enhanced properties, notably improved corrosion resistance for marine environments.​ The current study employed the CRITIC-MABAC method to optimize key attributes such as density, porosity, hardness, thermal conductivity, effusivity, polarization resistance, and corrosion rate in Al-Si1MgMn-TiB<sub>2</sub>/GNP hybrid composites. The composite’s hardness increased from 73.5 HV in sample S0 to a peak of 96.4 HV in sample S3, before slightly declining to 91.3 HV in sample S4, which was attributed to increased agglomeration and porosity. There was a significant improvement in thermal conductivity, increasing from 46.24&#xa0;W/mK in S0 to 98.56&#xa0;W/mK in S4, which indicates a better heat transfer capability. Similarly, thermal effusivity showed a steady rise from 12,600.02 Ws<sup>1/2</sup>/m<sup>2</sup>K in S0 to 17,711.82 Ws<sup>1/2</sup>/m<sup>2</sup>K in S4, demonstrating enhanced heat absorption and dissipation, a result of incorporating graphene nanoplatelets (GNPs) and TiB<sub>2</sub>. Tafel extrapolation analysis revealed that sample S3 exhibited the lowest corrosion rate at 0.1100&#xa0;mm/yr, while sample S0 showed the highest at 0.8917&#xa0;mm/yr. These findings were supported by FESEM analysis, which confirmed that S3 had superior corrosion resistance, S0 was more prone to corrosion, and S1, S2, and S4 displayed intermediate levels of resistance. Based on CRITIC-MABAC results, sample S2 was identified as the optimal sample, achieving an assessment score (<InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(\:\varnothing_i\)</EquationSource> </InlineEquation>) of 0.1860, which indicates enhanced overall performance across the evaluated criteria.</p>

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Optimal selection of TiB2/GNP augmented Al-Si1MgMn-based hybrid composites using CRITIC-MABAC technique

  • 期刊论文

  • 发表日期：

    2025年10月6日

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  • Maheswara Rao Ch,
  • VenkataSubbaiah K,
  • Suresh Ch

摘要

​ Aluminum hybrid composites are gaining prominence over monolithic-material options due to their enhanced properties, notably improved corrosion resistance for marine environments.​ The current study employed the CRITIC-MABAC method to optimize key attributes such as density, porosity, hardness, thermal conductivity, effusivity, polarization resistance, and corrosion rate in Al-Si1MgMn-TiB2/GNP hybrid composites. The composite’s hardness increased from 73.5 HV in sample S0 to a peak of 96.4 HV in sample S3, before slightly declining to 91.3 HV in sample S4, which was attributed to increased agglomeration and porosity. There was a significant improvement in thermal conductivity, increasing from 46.24 W/mK in S0 to 98.56 W/mK in S4, which indicates a better heat transfer capability. Similarly, thermal effusivity showed a steady rise from 12,600.02 Ws1/2/m2K in S0 to 17,711.82 Ws1/2/m2K in S4, demonstrating enhanced heat absorption and dissipation, a result of incorporating graphene nanoplatelets (GNPs) and TiB2. Tafel extrapolation analysis revealed that sample S3 exhibited the lowest corrosion rate at 0.1100 mm/yr, while sample S0 showed the highest at 0.8917 mm/yr. These findings were supported by FESEM analysis, which confirmed that S3 had superior corrosion resistance, S0 was more prone to corrosion, and S1, S2, and S4 displayed intermediate levels of resistance. Based on CRITIC-MABAC results, sample S2 was identified as the optimal sample, achieving an assessment score ( \(\:\varnothing_i\) ) of 0.1860, which indicates enhanced overall performance across the evaluated criteria.