Component effect on microstructure of rapidly cooled FeCuNi alloys

A MD simulation of FeCuNi alloys was performed. The evolution of structural parameters (including CN, the common neighbor sub-cluster, the largest standard cluster, and the structural entropy (Sstr)) revealed that the alloys are transformed into glass and Tg increases with Ni-addition. The effect of Ni-addition on the liquid state is opposite to or the same as the solid state, depending on the structural parameters. Analysis of the opposite effect unveiled another critical temperature (where crystal structures stop growing). Sstr can effectively quantify the disordered degree of a system. These findings have profound significance for the characteristics of disordered systems.