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<p>This research aims to explore the mechanical and microstructural properties of AZ91 magnesium alloy, which is reinforced with ZrC nanoparticles and produced through stir casting enhanced by ultrasonic assistance. The material’s inherent limitations in overall mechanical performance and toughness under harsh conditions are meant to be solved by the addition of ZrC nanoparticles. Tensile strength, hardness, and varied ZrC concentrations (1.5%, 3%, 4.5%, and 6%) were examined experimentally. The results reveal a remarkable 32% increase in hardness and a 67% improvement in tensile strength, confirming the efficiency of nanoparticle reinforcement. Furthermore, it was revealed that yield strength was strongly influenced by a number of strengthening mechanisms, such as the Grain refinement strengthening, Orowan mechanism, and dislocation strengthening. A maximum variance of 12.3% between the yield strength predicted and the experimental of the AZ91-ZrCnp composite verifies the accuracy of the applied prediction models. Overall, the results suggest that ZrC nanoparticles improve AZ91 composites’ mechanical characteristics for cutting-edge technical uses. The AZ91/ZrC nanocomposite that has been developed holds promise for use in lightweight structural parts in the automotive and aerospace sectors, where there is a demand for enhanced strength-to-weight ratio, wear resistance, and mechanical performance.</p>

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Mechanical enhancement and strengthening mechanisms of ultrasonically processed AZ91/ZrC nanoparticle composites

  • 期刊论文

  • 发表日期：

    2026年5月2日

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  • Sagayaraj P,
  • Ganesh Kumar D,
  • J. Elanchezhian,
  • K. Balamanikandasuthan,
  • S. Krishnakumar,
  • Thulasi Sankar

摘要

This research aims to explore the mechanical and microstructural properties of AZ91 magnesium alloy, which is reinforced with ZrC nanoparticles and produced through stir casting enhanced by ultrasonic assistance. The material’s inherent limitations in overall mechanical performance and toughness under harsh conditions are meant to be solved by the addition of ZrC nanoparticles. Tensile strength, hardness, and varied ZrC concentrations (1.5%, 3%, 4.5%, and 6%) were examined experimentally. The results reveal a remarkable 32% increase in hardness and a 67% improvement in tensile strength, confirming the efficiency of nanoparticle reinforcement. Furthermore, it was revealed that yield strength was strongly influenced by a number of strengthening mechanisms, such as the Grain refinement strengthening, Orowan mechanism, and dislocation strengthening. A maximum variance of 12.3% between the yield strength predicted and the experimental of the AZ91-ZrCnp composite verifies the accuracy of the applied prediction models. Overall, the results suggest that ZrC nanoparticles improve AZ91 composites’ mechanical characteristics for cutting-edge technical uses. The AZ91/ZrC nanocomposite that has been developed holds promise for use in lightweight structural parts in the automotive and aerospace sectors, where there is a demand for enhanced strength-to-weight ratio, wear resistance, and mechanical performance.