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<p>The study investigates how the TiC reinforcement affects the microstructural, mechanical, and electrochemical properties of the ZA-27 alloy. The ZA-27 alloy was fabricated using the stir-casting technique, while the composites were produced through the in-situ technique. Scanning electron microscopy (SEM) was utilized to analyze the microstructure and fracture surfaces in detail. The microstructure of the ZA-27 alloy reveals a complex assembly of α (Al) and η (Zn) phases, with ε (CuZn<sub>4</sub> intermetallic) phases precipitating within the interdendritic channels. Adding 5&#xa0;wt.% and 10&#xa0;wt.% TiC particles to the ZA-27 alloy leads to density reductions of 4.23% and 4.73%, respectively. The tensile results showed a notable strength increase from 189 MPa for the ZA-27 alloy to 253 MPa for the ZA-27/10% TiC. Compressive and flexural strength in ZA-27 alloy slightly decreases after incorporating TiC particles. The electrochemical corrosion results suggest that the ZA-27/10% TiC composite shows superior corrosion resistance. Fractographic analysis revealed that the matrix alloy predominantly exhibited a ductile fracture mode, while the composites primarily displayed a brittle fracture mode. A thorough analysis of this study provides valuable insights that enhance material design for automotive applications, particularly in the development of bearings.</p>

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Microstructural Evolution and Mechanical and Electrochemical Properties of TiC-Reinforced ZA-27 Alloy: A Comprehensive Analysis

  • 期刊论文

  • 发表日期：

    2025年5月8日

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  • Khursheed Ahmad Sheikh,
  • Mohammad Mohsin Khan,
  • Mohammad Irfan Hajam,
  • Sheikh Shahid Ul Islam

摘要

The study investigates how the TiC reinforcement affects the microstructural, mechanical, and electrochemical properties of the ZA-27 alloy. The ZA-27 alloy was fabricated using the stir-casting technique, while the composites were produced through the in-situ technique. Scanning electron microscopy (SEM) was utilized to analyze the microstructure and fracture surfaces in detail. The microstructure of the ZA-27 alloy reveals a complex assembly of α (Al) and η (Zn) phases, with ε (CuZn4 intermetallic) phases precipitating within the interdendritic channels. Adding 5 wt.% and 10 wt.% TiC particles to the ZA-27 alloy leads to density reductions of 4.23% and 4.73%, respectively. The tensile results showed a notable strength increase from 189 MPa for the ZA-27 alloy to 253 MPa for the ZA-27/10% TiC. Compressive and flexural strength in ZA-27 alloy slightly decreases after incorporating TiC particles. The electrochemical corrosion results suggest that the ZA-27/10% TiC composite shows superior corrosion resistance. Fractographic analysis revealed that the matrix alloy predominantly exhibited a ductile fracture mode, while the composites primarily displayed a brittle fracture mode. A thorough analysis of this study provides valuable insights that enhance material design for automotive applications, particularly in the development of bearings.