Thermal effects in multicomponent equiatomic Ni-based alloys under high-energy irradiation with Kr ions
Today, the concept of single-phase concentrated solid solutions offers an another strategy for increasing the radiation resistance of materials, namely, multi-element composition with equiatomic or almost equiatomic concentrations. Understanding the relationship between the chemical complexity of alloys and the thermal effects associated with irradiation is highly desirable to increase the radiation resistance of such materials. The purpose of this work was to analyze radiation heating, thermoelastic stresses and the density of growth dislocations in the family of Ni-based alloys: NiCo - NiFe-NiCoFe-NiCoCr-NiCoFeCr-NiCoFeMnCr, exposed to high-energy irradiation with 145 MeV Kr ions by numerical modeling. The results show that the composition complexity of alloys, especially for NiCoFeMnCr, favors radiation annealing of defects, a decrease in the dangerous thermoelastic stress level relative to the ultimate strength, and a decrease in the growth dislocation density compared to Ni.