Electrical resistivity and short-range order in rapid-quenched CrMnFeCoNi high-entropy alloy

Interplay between disorder and electronic correlations in compositionally complex alloys

“…This supports our linear response results. However, the substantial deviation from the experimental value of 105 µΩcm could be influenced by potential short-range ordering [54][55][56] , which has been experimentally shown increase resistivity 57 . Such mechanisms are not included within the CPA framework and need to be captured with more sophisticated methodologies like non-local CPA 58,59 .…”

Microstructure refinement and enhanced mechanical properties in rapid-quenched MnCrFeCoNi high-entropy alloy

“…The microstructures become finer with decreasing size of high-entropy droplets, due to undercooling levels [ 23 ]. Nanocrystallization in amorphous alloys were observed for rapid-quenched CrMnFeCoNi via study of electrical resistivity after electropulsing [ 24 ]. Superior soft magnetic properties have also been reported in Fe 25 Co 25 Ni 25 (B, Si) 25 with a fully glassy phase [ 25 ].…”

Conductivity of Multicomponent Alloy under Solid Solution Short-Range Order Cluster Model

“…However, in the actual situation, the positive ions in the metal will deviate from the original lattice point due to thermal vibration at a certain temperature and trigger the deformation of the original lattice and the dissolving other elements in metal, which both cause the changes in the periodic potential field of the original crystal under ideal conditions, thus the occurrence of scattering during the passing of the above external current will form resistivity, and then Ma Xisen, a famous British mathematician, put forward the empirical model of resistivity calculation (Matthiessen Rule) for low-concentration solid solution alloys; however, in recent years, the wide application and appearance of high-concentration solid solution alloys such as superalloys, high-entropy alloys, etc., as well as the large linear deviation between the resistivity predicted by Matthiessen Rule and the actual measured results in some low-concentration solid solution alloys, have all pushed scholars to further conduct researches on electronic spectrum of dilute solid solutions. − Thereby it is found that when other elements are added into alloy matrix element, they will show the short-range order of the solid solution after their rearrangement in the solid solution stage through the interactions between atoms, thus forming a short-range order model, while at the same time, the increasing contents of solid solution elements (from dilute solid solution to high solid solution) will make this short-range order structure gradually evolve into a long-range order structure or even a complete order structure in the whole solid solution structure. Based on this, an important thought to use chemical short-range order structure of solid solution for the characterization of alloy resistivity − was first proposed by Professor Tian Shan (1985) of the University of Aeronautics and Astronautics, thus associating the microscopic cluster model of alloy solid solution with the macroscopic resistivity. At the same time, a large number of experimental studies also show that, , the resistivity of alloy is mainly composed of the superposition of two-part scattering rate (as shown in formula (1), that is, the first part is the inherent resistivity formed by electron scattering that is caused by thermal vibration of the matrix lattice, while the other part is the additional resistivity formed by extra electron scattering that is caused by lattice deformation when other elements are dissolved in the matrix).…”