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<p>The escalating demand for high-performance and lightweight materials in the aerospace and automotive industries has intensified interest in aluminium–lithium (Al–Li) alloys due to their low density and exceptional strength-to-weight ratio. However, to meet the stringent demands of harsh service environments, substantial improvements in their mechanical strength, wear resistance, and corrosion protection are essential. This study investigates the fabrication and evaluation of a hybrid metal matrix composite based on 2099 Al–Li alloy, reinforced with zirconium diboride and titanium carbide particles, using a stir-squeeze casting technique in three different reinforcement configurations. Microstructural analysis of 2099 Al–Li composites confirmed the uniform dispersion of inclusions throughout the core matrix. Nano-indentation tests proved that ZT3 composite, 2099 Al–Li-6 wt.%ZrB<sub>2</sub>/3 wt.%TiC, had improved hardness and Young modulus compared to other composites due to the synergistic effect of the two reinforcements. The wear and corrosion performance of the composites was modelled using response surface methodology, and the ability of the models to predict the responses was confirmed, using ANOVA, which showed the statistical significance of the models. Artificial neural network modelling was also employed, and the results obtained are well correlated to experimental data.</p>

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Microstructural, wear, and corrosion performance of ZrB2–TiC reinforced 2099 Al–Li composites via RSM and ANN approaches

  • 期刊论文

  • 发表日期：

    2025年8月9日

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  • Farheen Kulsum,
  • Jeevan Vemula

摘要

The escalating demand for high-performance and lightweight materials in the aerospace and automotive industries has intensified interest in aluminium–lithium (Al–Li) alloys due to their low density and exceptional strength-to-weight ratio. However, to meet the stringent demands of harsh service environments, substantial improvements in their mechanical strength, wear resistance, and corrosion protection are essential. This study investigates the fabrication and evaluation of a hybrid metal matrix composite based on 2099 Al–Li alloy, reinforced with zirconium diboride and titanium carbide particles, using a stir-squeeze casting technique in three different reinforcement configurations. Microstructural analysis of 2099 Al–Li composites confirmed the uniform dispersion of inclusions throughout the core matrix. Nano-indentation tests proved that ZT3 composite, 2099 Al–Li-6 wt.%ZrB2/3 wt.%TiC, had improved hardness and Young modulus compared to other composites due to the synergistic effect of the two reinforcements. The wear and corrosion performance of the composites was modelled using response surface methodology, and the ability of the models to predict the responses was confirmed, using ANOVA, which showed the statistical significance of the models. Artificial neural network modelling was also employed, and the results obtained are well correlated to experimental data.