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<p>Performance improvements are essential for automobiles, aerospace engineering, and in biomedical applications, as lightweight materials that need to meet the functional parameters have become vital. This work deals with lightweight functionally graded metal matrix composites (FGMMCs) using aluminium alloy AA6061 as matrix with 4 wt% of SiC, and varying wt% (3%, 6%, 9%, 12%, 15%) of rubber ash as reinforcement materials and the influence of rubber ash has been studied in detail. The FGMMCs are made using centrifugal casting with optimised parameters to achieve graded functionality of the composite properties. The results confirm that the 4wt% SiC/15wt% Rubber Ash/AA6061 composite possesses a 30% higher tensile strength than the 4wt%SiC/ 3wt%Rubber Ash/AA6061 composite, whereas the elongation dropped from 29% to 7%. The microstructural analysis at different zones from the core to the surface confirms that the reinforcements were distributed functionally towards the surface. The surface hardness has been gradually increased to 37% from the 4wt%SiC/ 3wt%Rubber Ash/AA6061 composite to 4wt%SiC/ 15wt%Rubber Ash/AA6061 composite.</p>

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Study on the effect of rubber ash in AA6061-SiC functionally graded metal matrix composites

  • 期刊论文

  • 发表日期：

    2025年11月15日

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  • Madhu B.,
  • Harish Babu L.,
  • Balaji V.,
  • Brucely Y.,
  • Abeens M.,
  • Jenix Rino J.

摘要

Performance improvements are essential for automobiles, aerospace engineering, and in biomedical applications, as lightweight materials that need to meet the functional parameters have become vital. This work deals with lightweight functionally graded metal matrix composites (FGMMCs) using aluminium alloy AA6061 as matrix with 4 wt% of SiC, and varying wt% (3%, 6%, 9%, 12%, 15%) of rubber ash as reinforcement materials and the influence of rubber ash has been studied in detail. The FGMMCs are made using centrifugal casting with optimised parameters to achieve graded functionality of the composite properties. The results confirm that the 4wt% SiC/15wt% Rubber Ash/AA6061 composite possesses a 30% higher tensile strength than the 4wt%SiC/ 3wt%Rubber Ash/AA6061 composite, whereas the elongation dropped from 29% to 7%. The microstructural analysis at different zones from the core to the surface confirms that the reinforcements were distributed functionally towards the surface. The surface hardness has been gradually increased to 37% from the 4wt%SiC/ 3wt%Rubber Ash/AA6061 composite to 4wt%SiC/ 15wt%Rubber Ash/AA6061 composite.