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<p>This study investigates the tribological behavior of Aluminium Alloy (AA) 7075 composites reinforced with Al<sub>2</sub>O<sub>3</sub> (AO) and Ca<sub>2</sub>SiO<sub>4</sub> (CS) under dry sliding conditions. The AA7075 composites and hybrid composites were fabricated by stir-casting, and the surface morphology was analyzed. The effect of the applied load on the specific wear rate and wear mechanisms of the AA7075 composites was systematically analyzed. Based on the analysis, the wear maps were developed to evaluate the factor interactions and wear behavior. Results show that the AA7075 hybrid composite exhibited dominant adhesive wear with a specific wear rate below 1.7&#xa0;µg/Nm at optimal conditions—60&#xa0;N applied load with 8&#xa0;wt.% CS and 10&#xa0;wt.% AO reinforcements. Worn-surface analyses revealed wear transitions from delamination to fatigue wear in CS-reinforced composites and abrasive to third-body wear in AO-reinforced composites. These findings offer valuable insights into the design of high-performance hybrid composites for advanced tribological applications.</p>

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Development of Wear Maps for AA7075/Al2O3/Ca2SiO4 Hybrid Composites

  • 期刊论文

  • 发表日期：

    2026年3月26日

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  • K Gnanasekaran,
  • D Ananthapadmanaban,
  • R Franklin Issac

摘要

This study investigates the tribological behavior of Aluminium Alloy (AA) 7075 composites reinforced with Al2O3 (AO) and Ca2SiO4 (CS) under dry sliding conditions. The AA7075 composites and hybrid composites were fabricated by stir-casting, and the surface morphology was analyzed. The effect of the applied load on the specific wear rate and wear mechanisms of the AA7075 composites was systematically analyzed. Based on the analysis, the wear maps were developed to evaluate the factor interactions and wear behavior. Results show that the AA7075 hybrid composite exhibited dominant adhesive wear with a specific wear rate below 1.7 µg/Nm at optimal conditions—60 N applied load with 8 wt.% CS and 10 wt.% AO reinforcements. Worn-surface analyses revealed wear transitions from delamination to fatigue wear in CS-reinforced composites and abrasive to third-body wear in AO-reinforced composites. These findings offer valuable insights into the design of high-performance hybrid composites for advanced tribological applications.