PRODUCTION OF MULTI COMPONENT AND HIGH ENTROPY ALLOYS AND THEIR PHYSICAL PROPERTIES

Multi-component and high-entropy alloys (HEAs) have attracted significant attention as a new class of advanced materials due to their unique composition-driven properties and simple phase structures. Unlike conventional alloys, which are based on one principal element, HEAs consist of multiple principal elements in near-equiatomic proportions, resulting in high configurational entropy and unusual physical behavior. In this study, multi-component and high-entropy alloys were synthesized using vacuum arc melting and mechanical alloying followed by spark plasma sintering. The effects of fabrication routes on phase formation, microstructure, and physical properties were systematically investigated. X-ray diffraction analysis revealed predominantly FCC and BCC solid-solution phases, indicating effective entropy-driven phase stabilization. Microstructural observations showed that mechanically alloyed samples exhibited ultrafine-grained structures, while arc-melted alloys displayed coarser but chemically homogeneous microstructures. The investigated alloys demonstrated high hardness, stable elastic modulus, moderate electrical conductivity, low thermal expansion coefficients, and tunable magnetic behavior. The results confirm that both chemical composition and processing route play critical roles in tailoring the physical properties of high-entropy alloys. This study provides valuable insights into structure–property relationships in multi-component alloy systems and supports the potential of high-entropy alloys for next-generation structural and functional applications.