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<p>The study investigates the effects of varying reinforcement content (2, 4, 6&#xa0;wt.% SiC and 3, 4, 5&#xa0;wt.% WC) and sintering temperature (500, 550, and 600&#xa0;°C) on the tribomechanical properties of Al-SiC-WC hybrid metal matrix composites, fabricated through the powder metallurgy route. The responses, such as hardness and wear resistance, were systematically investigated using an L9 Taguchi orthogonal array, and their relationships with processing parameters were analysed through ANOVA, main effect plot, interaction plot, heat maps, regression modelling, and microstructural examination. Results showed that SiC significantly enhanced hardness via Orowan strengthening, while WC improved wear resistance due to its higher toughness. SEM analysis confirmed uniform particle distribution at lower reinforcement levels, whereas clustering and porosity were evident at higher concentrations and sintering temperatures. The maximum hardness of 98 HRB was achieved with 6&#xa0;wt.% SiC and 4&#xa0;wt.% WC at 500&#xa0;°C, while the minimum wear of 0.0034&#xa0;g occurred at 2&#xa0;wt.% SiC and 3&#xa0;wt.% WC at 500&#xa0;°C. Multi-objective optimisation using CRITIC-enhanced WASPAS, validated by TOPSIS, identified 6&#xa0;wt.% SiC, 4&#xa0;wt.% WC, and a sintering temperature of 500 °C as the optimal parameters, yielding superior mechanical and tribological performance. The findings highlight the synergistic role of reinforcement ratios and sintering temperature in tailoring advanced Al-based hybrid composites for automotive and aerospace applications.</p>

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CRITIC-Enhanced WASPAS and TOPSIS Optimization of Tribo-Mechanical Properties in Aluminum-SiC-WC Hybrid Composites

  • 期刊论文

  • 发表日期：

    2026年7月21日

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  • Syed Abid Hasan,
  • Umair Arif,
  • Faisal Hasan,
  • Mohammad Umair Zaki

摘要

The study investigates the effects of varying reinforcement content (2, 4, 6 wt.% SiC and 3, 4, 5 wt.% WC) and sintering temperature (500, 550, and 600 °C) on the tribomechanical properties of Al-SiC-WC hybrid metal matrix composites, fabricated through the powder metallurgy route. The responses, such as hardness and wear resistance, were systematically investigated using an L9 Taguchi orthogonal array, and their relationships with processing parameters were analysed through ANOVA, main effect plot, interaction plot, heat maps, regression modelling, and microstructural examination. Results showed that SiC significantly enhanced hardness via Orowan strengthening, while WC improved wear resistance due to its higher toughness. SEM analysis confirmed uniform particle distribution at lower reinforcement levels, whereas clustering and porosity were evident at higher concentrations and sintering temperatures. The maximum hardness of 98 HRB was achieved with 6 wt.% SiC and 4 wt.% WC at 500 °C, while the minimum wear of 0.0034 g occurred at 2 wt.% SiC and 3 wt.% WC at 500 °C. Multi-objective optimisation using CRITIC-enhanced WASPAS, validated by TOPSIS, identified 6 wt.% SiC, 4 wt.% WC, and a sintering temperature of 500 °C as the optimal parameters, yielding superior mechanical and tribological performance. The findings highlight the synergistic role of reinforcement ratios and sintering temperature in tailoring advanced Al-based hybrid composites for automotive and aerospace applications.