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Title: Mechanism of Radiation Damage Reduction in Equiatomic Multicomponent Single Phase Alloys

Journal Article · · Physical Review Letters

Recently a new class of metal alloys, of single-phase multicomponent composition at roughly equal atomic concentrations (“equiatomic”), have been shown to exhibit promising mechanical, magnetic, and corrosion resistance properties, in particular, at high temperatures. These features make them potential candidates for components of next-generation nuclear reactors and other high-radiation environments that will involve high temperatures combined with corrosive environments and extreme radiation exposure. In spite of a wide range of recent studies of many important properties of these alloys, their radiation tolerance at high doses remains unexplored. In this work, a combination of experimental and modeling efforts reveals a substantial reduction of damage accumulation under prolonged irradiation in single-phase NiFe and NiCoCr alloys compared to elemental Ni. This effect is explained by reduced dislocation mobility, which leads to slower growth of large dislocation structures. Finally and moreover, there is no observable phase separation, ordering, or amorphization, pointing to a high phase stability of this class of alloys.

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Energy Frontier Research Centers (EFRC) (United States). Energy Dissipation to Defect Evolution (EDDE)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); European Consortium for the Development of Fusion Energy (EUROfusion), Garching (Germany); Academy of Finland, Helsinki (Finland)
Grant/Contract Number:
DEAC02-05CH11231; AC05-00OR22725; 633053
OSTI ID:
1245043
Alternate ID(s):
OSTI ID: 1261311
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Vol. 116 Journal Issue: 13; ISSN 0031-9007
Publisher:
American Physical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 276 works
Citation information provided by
Web of Science

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