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Title: Radiation damage buildup by athermal defect reactions in nickel and concentrated nickel alloys

Abstract

We develop a new method using binary collision approximation simulating the Rutherford backscattering spectrometry in channeling conditions (RBS/C) from molecular dynamics atom coordinates of irradiated cells. The approach allows comparing experimental and simulated RBS/C signals as a function of depth without fitting parameters. The simulated RBS/C spectra of irradiated Ni and concentrated solid solution alloys (CSAs, NiFe and NiCoCr) show a good agreement with the experimental results. The good agreement indicates the damage evolution under damage overlap conditions in Ni and CSAs at room temperature is dominated by defect recombination and migration induced by irradiation rather than activated thermally.

Authors:
 [1];  [2];  [2];  [3]; ORCiD logo [4];  [5]
  1. Lanzhou University (China). School of Nuclear Science and Technology; Univ. of Helsinki (Finland). Department of Physics and Helsinki Institute of Physics
  2. Univ. of Helsinki (Finland). Department of Physics and Helsinki Institute of Physics; National Research Nuclear University MEPhI, Moscow (Russia)
  3. Univ. of Helsinki (Finland). Department of Physics and Helsinki Institute of Physics
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division
  5. Lanzhou University (China). School of Nuclear Science and Technology
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1399546
Grant/Contract Number:
AC05-00OR22725
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Materials Research Letters
Additional Journal Information:
Journal Volume: 5; Journal Issue: 6; Journal ID: ISSN 2166-3831
Publisher:
Taylor and Francis
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY; Radiation damage; damage buildup; concentrated solid solution alloys; Rutherford backscattering spectrometry; molecular dynamics; binary collision approximation

Citation Formats

Zhang, S., Nordlund, K., Djurabekova, F., Granberg, F., Zhang, Y., and Wang, T. S. Radiation damage buildup by athermal defect reactions in nickel and concentrated nickel alloys. United States: N. p., 2017. Web. doi:10.1080/21663831.2017.1311284.
Zhang, S., Nordlund, K., Djurabekova, F., Granberg, F., Zhang, Y., & Wang, T. S. Radiation damage buildup by athermal defect reactions in nickel and concentrated nickel alloys. United States. doi:10.1080/21663831.2017.1311284.
Zhang, S., Nordlund, K., Djurabekova, F., Granberg, F., Zhang, Y., and Wang, T. S. Wed . "Radiation damage buildup by athermal defect reactions in nickel and concentrated nickel alloys". United States. doi:10.1080/21663831.2017.1311284. https://www.osti.gov/servlets/purl/1399546.
@article{osti_1399546,
title = {Radiation damage buildup by athermal defect reactions in nickel and concentrated nickel alloys},
author = {Zhang, S. and Nordlund, K. and Djurabekova, F. and Granberg, F. and Zhang, Y. and Wang, T. S.},
abstractNote = {We develop a new method using binary collision approximation simulating the Rutherford backscattering spectrometry in channeling conditions (RBS/C) from molecular dynamics atom coordinates of irradiated cells. The approach allows comparing experimental and simulated RBS/C signals as a function of depth without fitting parameters. The simulated RBS/C spectra of irradiated Ni and concentrated solid solution alloys (CSAs, NiFe and NiCoCr) show a good agreement with the experimental results. The good agreement indicates the damage evolution under damage overlap conditions in Ni and CSAs at room temperature is dominated by defect recombination and migration induced by irradiation rather than activated thermally.},
doi = {10.1080/21663831.2017.1311284},
journal = {Materials Research Letters},
number = 6,
volume = 5,
place = {United States},
year = {Wed Apr 12 00:00:00 EDT 2017},
month = {Wed Apr 12 00:00:00 EDT 2017}
}

Journal Article:
Free Publicly Available Full Text
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Cited by: 2works
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  • A combined experimental and computational evaluation of damage accumulation in ion-irradiated Ni, NiFe, and NiFeCoCr is presented. Furthermore, a suppressed damage accumulation, at early stages (low-fluence irradiation), is revealed in NiFeCoCr, with a linear dependence as a function of ion fluence, in sharp contrast with Ni and NiFe. This effect, observed at 16 K, is attributed to the complex energy landscape in these alloys that limits defect mobility and therefore enhances defect interaction and recombination. Our results, together with previous room-temperature and high-temperature investigations, suggest "self-healing" as an intrinsic property of complex alloys that is not a thermally activated process.
  • A group of single-phase concentrated solid-solution alloys (SP-CSAs), including NiFe, NiCoFe, NiCoFeCr, as well as a high entropy alloy NiCoFeCrMn, was irradiated with 3 MeV Ni 2+ ions at 773 K to a fluence of 5 10 16 ions/cm 2 for the study of radiation response with increasing compositional complexity. Advanced transmission electron microscopy (TEM) with electron energy loss spectroscopy (EELS) was used to characterize the dislocation loop distribution and radiation-induced segregation (RIS) on defect clusters in the SP-CSAs. The results show that a higher fraction of faulted loops exists in the more compositionally complex alloys, which indicate that increasingmore » compositional complexity can extend the incubation period and delay loop growth. The RIS behaviors of each element in the SP-CSAs were observed as follows: Ni and Co tend to enrich, but Cr, Fe and Mn prefer to deplete near the defect clusters. RIS level can be significantly suppressed by increasing compositional complexity due to the sluggish atom diffusion. According to molecular static (MS) simulations, disk like segregations may form near the faulted dislocation loops in the SP-CSAs. Segregated elements tend to distribute around the whole faulted loop as a disk rather than only around the edge of the loop.« less
  • A group of single-phase concentrated solid-solution alloys (SP-CSAs), including NiFe, NiCoFe, NiCoFeCr, as well as a high entropy alloy NiCoFeCrMn, was irradiated with 3 MeV Ni 2+ ions at 773 K to a fluence of 5 10 16 ions/cm 2 for the study of radiation response with increasing compositional complexity. Advanced transmission electron microscopy (TEM) with electron energy loss spectroscopy (EELS) was used to characterize the dislocation loop distribution and radiation-induced segregation (RIS) on defect clusters in the SP-CSAs. The results show that a higher fraction of faulted loops exists in the more compositionally complex alloys, which indicate that increasingmore » compositional complexity can extend the incubation period and delay loop growth. The RIS behaviors of each element in the SP-CSAs were observed as follows: Ni and Co tend to enrich, but Cr, Fe and Mn prefer to deplete near the defect clusters. RIS level can be significantly suppressed by increasing compositional complexity due to the sluggish atom diffusion. According to molecular static (MS) simulations, disk like segregations may form near the faulted dislocation loops in the SP-CSAs. Segregated elements tend to distribute around the whole faulted loop as a disk rather than only around the edge of the loop.« less