Abstract:Metallic glasses (MG) possess many excellent physical and chemical properties due to their unique short-range ordered and long-range disordered structures. Among them, Fe-based amorphous alloys exhibit attractive application prospects and research value due to their excellent magnetic properties, mechanical properties, corrosion resistance, and the advantages of low raw material costs. In recent years, researchers have been committed to regulate the structure of Fe-based metallic glasses through composition design, aiming to change the deformation behaviors and performance characteristics of materials, and it is found that the addition of Cu can significantly affect the physical, chemical and mechanical properties of Fe-based MG (Fe-MG). The mechanism of the effect of Cu content addition on the relaxation behavior, crystallization behavior, melting and solidification behavior, glass transition behavior, glass formability, mechanical properties, magnetic properties, and other properties of amorphous alloys was discussed through an in-depth analysis of the effects of Cu on Fe-MG with different structures. In the end, it was clarified that adding Cu could promote the precipitation of α-Fe clusters from the matrix in Fe-MG, changing the deformation behavior and performance characteristics of materials. The research results could provide a theoretical guidance and an experimental reference for improving the deformation behaviors of metallic glasses and optimizing their properties through component fine tuning.