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<p>This study focuses on the synthesis and tribo-mechanical characterization of an aluminum matrix composite (AMC) reinforced with 5 wt.% magnesium, 1 wt.% graphite, and 4 wt.% soda-lime silica glass, fabricated via the powder metallurgy (PM) route. The novelty of this investigation lies in introducing hot extrusion to the AMC fabricated through the PM route and correlating the microstructural refinement with tribo-mechanical characteristics. The influence of a secondary thermomechanical treatment on the mechanical and wear behavior of the composite is systematically investigated. Comparative dry sliding wear tests were conducted on both as-sintered and hot-extruded specimens. Microstructural densification and refined particle distribution caused by hot extrusion result in a significant enhancement of the composite’s mechanical properties, including hardness by approximately 35.76%, compressive strength, and transverse rupture strength by approximately 81.8%. Furthermore, during tribological testing, the shearing of uniformly dispersed graphite particles at the wear interface acts as a solid lubricant, effectively reducing the average wear rate by 23.6%. Overall, the hot-extruded AMCs exhibit superior wear resistance under all test conditions, primarily due to improved interfacial bonding and mechanical integrity induced by the extrusion process.</p>

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Enhancement of Mechanical and Tribological Properties of Al–Mg–Gr-Soda-Lime Silica Glass Composite through Hot Extrusion

  • 期刊论文

  • 发表日期：

    2026年6月29日

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  • Sambit Kumar Mohapatra,
  • Ashutosh Pattanaik,
  • Mantra Prasad Satpathy,
  • Kalipada Maity

摘要

This study focuses on the synthesis and tribo-mechanical characterization of an aluminum matrix composite (AMC) reinforced with 5 wt.% magnesium, 1 wt.% graphite, and 4 wt.% soda-lime silica glass, fabricated via the powder metallurgy (PM) route. The novelty of this investigation lies in introducing hot extrusion to the AMC fabricated through the PM route and correlating the microstructural refinement with tribo-mechanical characteristics. The influence of a secondary thermomechanical treatment on the mechanical and wear behavior of the composite is systematically investigated. Comparative dry sliding wear tests were conducted on both as-sintered and hot-extruded specimens. Microstructural densification and refined particle distribution caused by hot extrusion result in a significant enhancement of the composite’s mechanical properties, including hardness by approximately 35.76%, compressive strength, and transverse rupture strength by approximately 81.8%. Furthermore, during tribological testing, the shearing of uniformly dispersed graphite particles at the wear interface acts as a solid lubricant, effectively reducing the average wear rate by 23.6%. Overall, the hot-extruded AMCs exhibit superior wear resistance under all test conditions, primarily due to improved interfacial bonding and mechanical integrity induced by the extrusion process.