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- W3004456710 abstract "• The SP-CSAs have higher radiation tolerance than pure Ni, especially in NiFe alloy. • Migration behaviors of defect clusters lead to different recombination rate of defects. • Interstitial loops in binary SP-CSAs delay the nucleation and evolution of defects. As a great potential structural-material candidate for nuclear power applications, single-phase concentrated solid-solution alloys containing different elements have outstanding mechanical properties. In order to explore the effects of their elemental compositions on their radiation tolerance properties, in this work, radiation-induced defect production, as well as defect cluster and dislocation loop evolution, are investigated for equiatomic NiCo and NiFe alloys, and pure Ni, using molecular dynamics simulations. We find that the binary alloys are more radiation-resistant than pure Ni, while the NiFe binary alloy has the best radiation tolerance due to a higher recombination of defects and a lower number of surviving Frenkel pairs after cascade, compared to NiCo and pure Ni. Small defect clusters appearing in the three materials exhibit different migration behaviors, which migrate in a simple one-dimensional mode in pure Ni, but randomly change directions in the binary alloys; this behavior in the latter is thought to enhance the recombination of defects. Vacancy-type stacking fault tetrahedra and mixed interstitial dislocation loops with different types of dislocation segments are also observed. Interstitial dislocation loops generated in the NiCo and NiFe alloys show delayed and sluggish nucleation and evolution processes, which may lead to a higher probability of defect recombination during their evolution. Moreover, the formation of mixed dislocation loops is also discussed." @default.
- W3004456710 created "2020-02-14" @default.
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- W3004456710 date "2020-05-01" @default.
- W3004456710 modified "2023-10-18" @default.
- W3004456710 title "Molecular dynamics simulations of radiation damage generation and dislocation loop evolution in Ni and binary Ni-based alloys" @default.
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- W3004456710 doi "https://doi.org/10.1016/j.commatsci.2020.109555" @default.
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