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Title: Effects of chemical alternation on damage accumulation in concentrated solid-solution alloys

Single-phase concentrated solid-solution alloys (SP-CSAs) have recently gained unprecedented attention due to their promising properties. To understand effects of alloying elements on irradiation-induced defect production, recombination and evolution, an integrated study of ion irradiation, ion beam analysis and atomistic simulations are carried out on a unique set of model crystals with increasing chemical complexity, from pure Ni to Ni 80Fe 20, Ni 50Fe 50, and Ni 80Cr 20 binaries, and to a more complex Ni 40Fe 40Cr 20 alloy. Both experimental and simulation results suggest that the binary and ternary alloys exhibit higher radiation resistance than elemental Ni. The modeling work predicts that Ni 40Fe 40Cr 20 has the best radiation tolerance, with the number of surviving Frenkel pairs being factors of 2.0 and 1.4 lower than pure Ni and the 80:20 binary alloys, respectively. While the reduced defect mobility in SP-CSAs is identified as a general mechanism leading to slower growth of large defect clusters, the effect of specific alloying elements on suppression of damage accumulation is clearly demonstrated. This work suggests that concentrated solid-solution provides an effective way to enhance radiation tolerance by creating elemental alternation at the atomic level. The demonstrated chemical effects on defect dynamics maymore » inspire new design principles of radiation-tolerant structural alloys for advanced energy systems.« less
Authors:
ORCiD logo [1] ;  [2] ;  [1] ; ORCiD logo [1] ; ORCiD logo [1] ; ORCiD logo [3] ;  [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division
  2. Univ. of Tennessee, Knoxville, TN (United States). Department of Materials Science and Engineering
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division; Univ. of Tennessee, Knoxville, TN (United States). Department of Materials Science and Engineering
Publication Date:
Grant/Contract Number:
AC05-00OR22725; AC02-05CH11231
Type:
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 7; Journal Issue: 1; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
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)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE
OSTI Identifier:
1394553

Ullah, Mohammad W., Xue, Haizhou, Velisa, Gihan, Jin, Ke, Bei, Hongbin, Weber, William J., and Zhang, Yanwen. Effects of chemical alternation on damage accumulation in concentrated solid-solution alloys. United States: N. p., Web. doi:10.1038/s41598-017-04541-8.
Ullah, Mohammad W., Xue, Haizhou, Velisa, Gihan, Jin, Ke, Bei, Hongbin, Weber, William J., & Zhang, Yanwen. Effects of chemical alternation on damage accumulation in concentrated solid-solution alloys. United States. doi:10.1038/s41598-017-04541-8.
Ullah, Mohammad W., Xue, Haizhou, Velisa, Gihan, Jin, Ke, Bei, Hongbin, Weber, William J., and Zhang, Yanwen. 2017. "Effects of chemical alternation on damage accumulation in concentrated solid-solution alloys". United States. doi:10.1038/s41598-017-04541-8. https://www.osti.gov/servlets/purl/1394553.
@article{osti_1394553,
title = {Effects of chemical alternation on damage accumulation in concentrated solid-solution alloys},
author = {Ullah, Mohammad W. and Xue, Haizhou and Velisa, Gihan and Jin, Ke and Bei, Hongbin and Weber, William J. and Zhang, Yanwen},
abstractNote = {Single-phase concentrated solid-solution alloys (SP-CSAs) have recently gained unprecedented attention due to their promising properties. To understand effects of alloying elements on irradiation-induced defect production, recombination and evolution, an integrated study of ion irradiation, ion beam analysis and atomistic simulations are carried out on a unique set of model crystals with increasing chemical complexity, from pure Ni to Ni80Fe20, Ni50Fe50, and Ni80Cr20 binaries, and to a more complex Ni40Fe40Cr20 alloy. Both experimental and simulation results suggest that the binary and ternary alloys exhibit higher radiation resistance than elemental Ni. The modeling work predicts that Ni40Fe40Cr20 has the best radiation tolerance, with the number of surviving Frenkel pairs being factors of 2.0 and 1.4 lower than pure Ni and the 80:20 binary alloys, respectively. While the reduced defect mobility in SP-CSAs is identified as a general mechanism leading to slower growth of large defect clusters, the effect of specific alloying elements on suppression of damage accumulation is clearly demonstrated. This work suggests that concentrated solid-solution provides an effective way to enhance radiation tolerance by creating elemental alternation at the atomic level. The demonstrated chemical effects on defect dynamics may inspire new design principles of radiation-tolerant structural alloys for advanced energy systems.},
doi = {10.1038/s41598-017-04541-8},
journal = {Scientific Reports},
number = 1,
volume = 7,
place = {United States},
year = {2017},
month = {6}
}