Mechanism of Radiation Damage Reduction in Equiatomic Multicomponent Single Phase Alloys

“…We find that vacancy concentration saturates well below the dose of 1 dpa, see Fig. 4 a, in agreement with independent simulations 13 , 14 , 16 and experimental observations 32 , 33 . This can be rationalised by recognising that the number of molten atoms per cascade is much higher than the number of ballistically displaced atoms, as suggested by their respective characteristic energy scales .…”

“…The results indicate similar defect evolution between Ni 0.5 Fe 0.5 and Ni 0.8 Cr 0.2 , which is consistent with experimental results [25]. In addition, the lowest defect number in Ni 0.4 Fe 0.4 Cr 0.2 and Ni 0.333 Co 0.333 Cr 0.333 is also in accordance with the available experiments [8,26] 333 , yet the defect evolution in these three alloys is similar. These results suggest that structural properties, such as lattice misfit and enthalpy of mixing, are not correlated with specific defect evolution in CSAs, and we need to look into the defect properties.…”

“…We observe that the vacancy fraction reaches a concentration close to 0.3 at.%. This is in line with previous experiments on tungsten [25] and other metals [66], as well as similar simulations on other metals [21,55,56].…”

“…We find that vacancy concentration saturates well below the dose of 1 dpa, see Fig. 4 a, in agreement with independent simulations 13 , 14 , 16 and experimental observations 32 , 33 . This can be rationalised by recognising that the number of molten atoms per cascade is much higher than the number of ballistically displaced atoms, as suggested by their respective characteristic energy scales .…”

“…The results indicate similar defect evolution between Ni 0.5 Fe 0.5 and Ni 0.8 Cr 0.2 , which is consistent with experimental results [25]. In addition, the lowest defect number in Ni 0.4 Fe 0.4 Cr 0.2 and Ni 0.333 Co 0.333 Cr 0.333 is also in accordance with the available experiments [8,26] 333 , yet the defect evolution in these three alloys is similar. These results suggest that structural properties, such as lattice misfit and enthalpy of mixing, are not correlated with specific defect evolution in CSAs, and we need to look into the defect properties.…”

“…We observe that the vacancy fraction reaches a concentration close to 0.3 at.%. This is in line with previous experiments on tungsten [25] and other metals [66], as well as similar simulations on other metals [21,55,56].…”

“…We find that vacancy concentration saturates well below the dose of 1 dpa, see Fig. 4 a, in agreement with independent simulations 13 , 14 , 16 and experimental observations 32 , 33 . This can be rationalised by recognising that the number of molten atoms per cascade is much higher than the number of ballistically displaced atoms, as suggested by their respective characteristic energy scales .…”

“…The results indicate similar defect evolution between Ni 0.5 Fe 0.5 and Ni 0.8 Cr 0.2 , which is consistent with experimental results [25]. In addition, the lowest defect number in Ni 0.4 Fe 0.4 Cr 0.2 and Ni 0.333 Co 0.333 Cr 0.333 is also in accordance with the available experiments [8,26] 333 , yet the defect evolution in these three alloys is similar. These results suggest that structural properties, such as lattice misfit and enthalpy of mixing, are not correlated with specific defect evolution in CSAs, and we need to look into the defect properties.…”

“…We observe that the vacancy fraction reaches a concentration close to 0.3 at.%. This is in line with previous experiments on tungsten [25] and other metals [66], as well as similar simulations on other metals [21,55,56].…”