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In the recent years it has been a tremendous interest in the complex concentrated alloys (CCAs), due to their novelty introduced by the multiple principal elements concept. As a new generation of structural materials, CCAs have the potential for a promising range of properties. CCAs consist of a mixture of four or more elements in high proportion, provided by a wide compositional space. The high mixing entropy of CCAs generates structures containing complex solid solution and well dispersed intermetallic phases. Many CCA systems cover a wide range of mechanical and physical properties, like strength, toughness, stiffness and oxidation resistance. The present work analyses the AlCuSiZnMg alloy system, which presents a significant potential in applications with intensively corrosive work conditions. Thermodynamic and kinetic criteria were calculated for the multicomponent alloy system, to obtain the most appropriate proportion for each element. In addition, MatCalc simulating program was used to model the growth of the precipitated phases during solidification processes. This optimisation of the rapid solidification process was accomplished to obtain the best structural particularities needed for the required properties. The selected alloy was prepared by induction melting process and rapid solidified by melt spinning technique. The resulted samples were analysed by physical-chemical and microstructural techniques and the empirical results were compared to the modelling findings to correlate the obtained properties and to estimate the final performances of the alloy.
Keywords: Complex concentrated alloys, ribbons, modelling, melt-spinning© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.