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High Entropy Alloy AlCoFeNiMoTi Particles as Reinforcement in an Al 2024 Matrix Synthesized by Powder Metallurgy

Aluminium is one of the most lightweight structural metals. Its alloys offer the greatest potential for energy efficiency improvements in a variety of industrial sectors. This is because of its attractive qualities such as low density and high strength-weight ratio. It is also the most abundant metallic element of the Earth's crust, which makes it one of the most precious and useful materials. However, aluminium is far from being an ideal material, since, under special working conditions, its disadvantages stand out, such as moderate mechanical strength, limited wear resistance and low hardness. The manufacture of aluminium matrix composites (AMC) is an increasingly popular alternative to improve the properties of aluminium and its alloys. In this way, the benefits of aluminium as a matrix are taken advantage of and improved with the incorporation of reinforcements, which add specific strength and hardness. A novel reinforcement option in aluminium matrices, which has gained greater interest in recent years, is high entropy alloys (HEA). Due to the physical and chemical nature of the matrix and reinforcement, they will not have the disadvantages of low wettability and weak adhesion that are present when using conventional ceramic reinforcements such as oxides, nitrides, or carbides. There are different methods, processes, and modifications with which it is possible to synthesize AMC, where it is sought to take advantage of the benefits of the constituents that make it up and, as far as possible, to optimise manufacturing time and costs. Therefore, the present work studies the microstructure and microhardness of aluminium 2024 composite materials reinforced with high entropy AlCoFeNiMoTi alloy particles, using a powder metallurgy synthesis method that includes hot pressing by electromagnetic induction to help reduce sintering times and temperatures.