INVESTIGATION OF HARDNESS AND MICROSTRUCTURE IN Al+Sn POWDER ALLOY COMPOSITES REINFORCED WITH RESIN
Keywords:
Resin Reinforcement, Hardness Testing, MicrostructureAbstract
Composite materials represent a prominent class of engineering alternatives developed to substitute conventional materials, which are increasingly constrained in terms of both availability and performance. Among the conventional materials addressed in this context are aluminum (Al) and tin (Sn), which are traditionally recognized for their low density, ductile behavior, and notable resistance to corrosion. The present study aims to evaluate the hardness characteristics and microstructural features of Al+Sn metal powder composite alloys reinforced with a resin binder. Microstructural examination revealed the presence of three distinct constituent phases: an Al+Sn combined phase exhibiting a yellowish coloration, an elemental Sn phase with a bright metallic appearance, and visible porosity defects distributed throughout the matrix. Corresponding Brinell hardness values for the various specimen compositions are as follows: Al 50%–Sn 50% recorded 51.67 N/mm²; Al 60%–Sn 40% recorded 55.86 N/mm²; Al 70%–Sn 30% recorded 64.69 N/mm²; Al 80%–Sn 20% recorded 68.01 N/mm²; and Al 90%–Sn 10% recorded 64.77 N/mm². These findings collectively indicate that an increase in the proportion of aluminum within the Al–Sn alloy system produces a progressive improvement in composite hardness.
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Copyright (c) 2026 Muhammad Halim Asiri, Bahdin Ahad Badia (Author)
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