Mechanism of Radiation Damage Reduction in Equiatomic Multicomponent Single Phase Alloys
Abstract
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.
- Authors:
- Publication Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Energy Frontier Research Centers (EFRC) (United States). Energy Dissipation to Defect Evolution (EDDE)
- Sponsoring Org.:
- 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)
- OSTI Identifier:
- 1245043
- Alternate Identifier(s):
- OSTI ID: 1261311
- Grant/Contract Number:
- DEAC02-05CH11231; AC05-00OR22725; 633053
- Resource Type:
- Published Article
- Journal Name:
- Physical Review Letters
- Additional Journal Information:
- Journal Name: Physical Review Letters Journal Volume: 116 Journal Issue: 13; Journal ID: ISSN 0031-9007
- Publisher:
- American Physical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Granberg, F., Nordlund, K., Ullah, Mohammad W., Jin, K., Lu, C., Bei, H., Wang, L. M., Djurabekova, F., Weber, W. J., and Zhang, Y. Mechanism of Radiation Damage Reduction in Equiatomic Multicomponent Single Phase Alloys. United States: N. p., 2016.
Web. doi:10.1103/PhysRevLett.116.135504.
Granberg, F., Nordlund, K., Ullah, Mohammad W., Jin, K., Lu, C., Bei, H., Wang, L. M., Djurabekova, F., Weber, W. J., & Zhang, Y. Mechanism of Radiation Damage Reduction in Equiatomic Multicomponent Single Phase Alloys. United States. https://doi.org/10.1103/PhysRevLett.116.135504
Granberg, F., Nordlund, K., Ullah, Mohammad W., Jin, K., Lu, C., Bei, H., Wang, L. M., Djurabekova, F., Weber, W. J., and Zhang, Y. Fri .
"Mechanism of Radiation Damage Reduction in Equiatomic Multicomponent Single Phase Alloys". United States. https://doi.org/10.1103/PhysRevLett.116.135504.
@article{osti_1245043,
title = {Mechanism of Radiation Damage Reduction in Equiatomic Multicomponent Single Phase Alloys},
author = {Granberg, F. and Nordlund, K. and Ullah, Mohammad W. and Jin, K. and Lu, C. and Bei, H. and Wang, L. M. and Djurabekova, F. and Weber, W. J. and Zhang, Y.},
abstractNote = {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.},
doi = {10.1103/PhysRevLett.116.135504},
journal = {Physical Review Letters},
number = 13,
volume = 116,
place = {United States},
year = {Fri Apr 01 00:00:00 EDT 2016},
month = {Fri Apr 01 00:00:00 EDT 2016}
}
https://doi.org/10.1103/PhysRevLett.116.135504
Web of Science
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