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Title: 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:
 [1];  [1];  [2];  [3];  [4];  [3];  [4];  [5];  [6];  [3]
  1. Univ. of Helsinki (Finland). Dept. of Physics
  2. Univ. of Helsinki (Finland). Dept. of Physics; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Science and Technology Division
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division
  4. Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Nuclear Engineering and Radiological Sciences
  5. Univ. of Helsinki (Finland). Helsinki Inst. of Physics; Univ. of Helsinki (Finland). Dept. of Physics
  6. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division; Univ. of Tennessee, Knoxville, TN (United States). Dept. of Materials Science and Engineering
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) (SC-22); 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:  
AC05-00OR22725; 633053; DEAC02-05CH11231
Resource Type:
Published Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 116; Journal Issue: 13; Related Information: EDDE partners with Oak Ridge National Laboratory (lead); Lawrence Livermore National Laboratory; University of Michigan; University of Tennessee; University of Wisconsin; University of Wyoming; Virginia Tech; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
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. 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., and Zhang, Y. Fri . "Mechanism of Radiation Damage Reduction in Equiatomic Multicomponent Single Phase Alloys". United States. doi: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 = {2016},
month = {4}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1103/PhysRevLett.116.135504

Citation Metrics:
Cited by: 35 works
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Works referenced in this record:

Nanostructured High-Entropy Alloys with Multiple Principal Elements: Novel Alloy Design Concepts and Outcomes
journal, May 2004

  • Yeh, J.-W.; Chen, S.-K.; Lin, S.-J.
  • Advanced Engineering Materials, Vol. 6, Issue 5, p. 299-303
  • DOI: 10.1002/adem.200300567