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<p>This study investigates the influence of mono- and hybrid reinforcements on the microstructure, hardness, wear, and corrosion resistance of AA5083 Al-metal matrix composites fabricated via friction-stir surface processing (FSP). MAX-phase (Ti<sub>3</sub>SiC<sub>2</sub>), graphite (G), carbon nanotubes (CNTs), boron, and silicon nitride (BN, SiN) nanoparticles were incorporated individually and in hybrid combinations. Microstructural analysis revealed refinement of grains in the stirred zone, with further refinement observed in reinforced composites, refined by 45 times, attributed to particle presence hindering grain growth. Vickers microhardness tests revealed increased hardness in all reinforced composites. SiN showed the highest hardness among mono-reinforced composites (103 ± 4 VH), while Ti<sub>3</sub>SiC<sub>2</sub> + G yielded the highest overall hardness (109 ± 3 VH). The hardness, wear rate, and corrosion rate of the unreinforced alloy were 88 ± 2 VH, 0.00649 g/min, and 1.4 × 10<sup>-5</sup>&#xa0;mm/y, respectively. Wear testing demonstrated improved wear resistance in all reinforced composites, with graphite exhibiting the lowest wear rate (0.0019 g/min) and Ti<sub>3</sub>SiC<sub>2</sub> + G performing best among hybrid composites (0.00218 g/min). Corrosion behavior was assessed using potentiodynamic polarization, with results indicating variations in corrosion resistance across the different reinforcement strategies. This research highlights the potential of FSP combined with hybrid MAX-phase reinforcements to tailor the properties of AA5083 composites for demanding applications.</p>

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Investigating the Microstructure, Mechanical Properties, Wear, and Corrosion Behavior of Hybrid MAX-Phase-Reinforced AA 5083 Composites Fabricated By Friction Stir Surface Processing

  • 期刊论文

  • 发表日期：

    2025年8月11日

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  • Sahw S. Almutairi,
  • Essam B. Moustafa,
  • S. S. Mohamed,
  • T. S. Mahmoud,
  • Ahmed O. Mosleh

摘要

This study investigates the influence of mono- and hybrid reinforcements on the microstructure, hardness, wear, and corrosion resistance of AA5083 Al-metal matrix composites fabricated via friction-stir surface processing (FSP). MAX-phase (Ti3SiC2), graphite (G), carbon nanotubes (CNTs), boron, and silicon nitride (BN, SiN) nanoparticles were incorporated individually and in hybrid combinations. Microstructural analysis revealed refinement of grains in the stirred zone, with further refinement observed in reinforced composites, refined by 45 times, attributed to particle presence hindering grain growth. Vickers microhardness tests revealed increased hardness in all reinforced composites. SiN showed the highest hardness among mono-reinforced composites (103 ± 4 VH), while Ti3SiC2 + G yielded the highest overall hardness (109 ± 3 VH). The hardness, wear rate, and corrosion rate of the unreinforced alloy were 88 ± 2 VH, 0.00649 g/min, and 1.4 × 10-5 mm/y, respectively. Wear testing demonstrated improved wear resistance in all reinforced composites, with graphite exhibiting the lowest wear rate (0.0019 g/min) and Ti3SiC2 + G performing best among hybrid composites (0.00218 g/min). Corrosion behavior was assessed using potentiodynamic polarization, with results indicating variations in corrosion resistance across the different reinforcement strategies. This research highlights the potential of FSP combined with hybrid MAX-phase reinforcements to tailor the properties of AA5083 composites for demanding applications.