Experimental Studies on Mechanical Properties of Al 7075/HEAp (Al-Cu-Co-Cr-Fe) Metal Matrix Composites and its Dry Sliding Wear Behaviour

1.The results clearly indicate that incorporating HEA particles into Al7075 improves its overall properties. The experimental density values are very close to the theoretical ones, which suggests that the composites were produced with good quality and strong bonding between the matrix and reinforcement. 2.As the percentage of reinforcement increases, the hardness of the material also increases, showing better resistance to indentation and wear. In the same way, tensile strength improves with higher reinforcement content, meaning the composites can handle greater applied loads than the base alloy.  3.The impact strength does not follow a clear trend, which means the addition of reinforcement does not significantly enhance the material’s ability to absorb sudden loads. 4.The wear test results highlight that higher reinforcement leads to lower wear. Among all the samples, the 9% HEA composite shows the least wear, indicating the best wear resistance.  5. As the reinforcement percentage increases from 3% to 9%, the weight loss gradually decreases, demonstrating enhanced resistance to material degradation. Among all the specimens, the 9% HEA composite exhibits the lowest weight loss across all time intervals, indicating superior corrosion performance. The study confirms that increasing HEA reinforcement is an effective way to enhance the corrosion resistance of Al7075, making it more suitable for applications in aggressive environments. In summary, increasing the reinforcement percentage has the strongest effect on improving mechanical and wear properties, with 9% reinforcement giving the most effective results.

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