Underlying the diverse material systems, there is a persistent scientific challenge that has not been well resolved, that is, how the muticomponent, complex alloy elements lead to the formation, stability and functionality in the solid and liquid phases and how electronic, atomic and micro-structures are linked to phase stability defined conventionally in thermodynamic and kinetics. As the functionality and application become more demanding, answering these questions and understanding the structure-property relationships, and exploring of new complex alloy systems become not only urgent but also necessary. Therefore, this symposium will focus on both application and basic understanding of the multicomponent alloy systems. This includes new synthesis methods, advanced structural and chemical characterization, novel measurement of properties, device development and applications, and penetrating theoretical and simulation understanding. Therefore, submissions are encouraged covering the wide range of materials science, fabrication, theory, simulation, and material/device characterization and applications in existing and emerging areas.