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<p>In the present study, A356 matrix composite materials (A356MCMs) and hybrid composite materials (A356HCMs) reinforced with B<sub>4</sub>C and SiC have been produced by the Mechanical Milling (MM) method. The study aims to determine the effect of B<sub>4</sub>C and SiC reinforcement phases on these materials' microstructure and wear resistance. Also, to investigate the effect of reinforcement phases on AlSi (Fe/Mn) intermetallics formed in the microstructure. As a result, it has been observed that the fracture rate increased depending on the amount of reinforcement phase increase. It has been determined that the ductile A356 alloy powders have a flake shape, and the size of the brittle reinforcement phases decreased due to repeat plastic deformation during MM. It was observed that the fracture rate increased due to the increase in the amount of reinforcement phase. Significantly, the addition of B<sub>4</sub>C and SiC reinforcement phases in A356 alloy are motivated the formation of AlSi (Fe/Mn) intermetallic with different compositions and morphology in the microstructure. The B<sub>4</sub>C reinforcement phase added to the A356 matrix caused the AlSi (Fe/Mn) phases to form in a rosette form, whereas the SiC reinforcement phase resulted in the formation of plates. In particular, the B<sub>4</sub>C reinforcement phase plays a more active role in the fracture rate and intermetallic formation than the SiC reinforcement phase.</p>

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The Effect of Reinforcement Phases on the Evolution of Microstructure and Wear Behaviour in A356 Matrix B4C/SiC Reinforced Composite and Hybrid Composite Materials

  • 期刊论文

  • 发表日期：

    2026年7月8日

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  • Tansel Tunçay,
  • Aslı Bahadir,
  • Badegül Tunçay

摘要

In the present study, A356 matrix composite materials (A356MCMs) and hybrid composite materials (A356HCMs) reinforced with B4C and SiC have been produced by the Mechanical Milling (MM) method. The study aims to determine the effect of B4C and SiC reinforcement phases on these materials' microstructure and wear resistance. Also, to investigate the effect of reinforcement phases on AlSi (Fe/Mn) intermetallics formed in the microstructure. As a result, it has been observed that the fracture rate increased depending on the amount of reinforcement phase increase. It has been determined that the ductile A356 alloy powders have a flake shape, and the size of the brittle reinforcement phases decreased due to repeat plastic deformation during MM. It was observed that the fracture rate increased due to the increase in the amount of reinforcement phase. Significantly, the addition of B4C and SiC reinforcement phases in A356 alloy are motivated the formation of AlSi (Fe/Mn) intermetallic with different compositions and morphology in the microstructure. The B4C reinforcement phase added to the A356 matrix caused the AlSi (Fe/Mn) phases to form in a rosette form, whereas the SiC reinforcement phase resulted in the formation of plates. In particular, the B4C reinforcement phase plays a more active role in the fracture rate and intermetallic formation than the SiC reinforcement phase.