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Title: Enhanced diffusion of Cr in 20Cr-25Ni type alloys under proton irradiation at 670 °C

Abstract

Alloy 709 (Fe-20Cr-25Ni-1.5Mo-0.26Nb in weight percentages) and its model alloy (Fe-20Cr-25Ni) were subjected to 2 MeV proton irradiation up to 1.5 displacements per atom at ~670 °C for 90 h. Significant compositional changes were observed in the irradiated zone of both alloys, which was correlated with the radiation-enhanced diffusion. The radiation-enhanced diffusion coefficient of Cr was experimentally determined by fitting the Cr depletion profiles and theoretically analyzed considering vacancy-assisted lattice diffusion, dislocation pipeline diffusion, etc. The estimation of the radiation-enhanced diffusion in the 20Cr-25Ni type alloy in this study is useful in predicting its performance in radiation damage environment. In conclusion, the methodology of investigating radiation-enhanced diffusion adds to the nuclear-material screening capability of ion-irradiation technologies.

Authors:
ORCiD logo [1]; ORCiD logo [2];  [3];  [3];  [3];  [4]; ORCiD logo [2]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Oregon State Univ., Corvallis, OR (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Univ. of Wisconsin, Madison, WI (United States)
  4. Univ. of Tennessee, Knoxville, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1478543
Alternate Identifier(s):
OSTI ID: 1479797
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Journal Article: Published Article
Journal Name:
Nuclear Materials and Energy
Additional Journal Information:
Journal Volume: 17; Journal Issue: C; Journal ID: ISSN 2352-1791
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Radiation damage; Ion irradiation; Radiation-enhanced diffusion; Cr depletion; Oxidation

Citation Formats

Chen, Tianyi, Yang, Ying, He, Li, Tyburska-Püschel, Beata, Sridharan, Kumar, Xu, Haixuan, and Tan, Lizhen. Enhanced diffusion of Cr in 20Cr-25Ni type alloys under proton irradiation at 670 °C. United States: N. p., 2018. Web. doi:10.1016/j.nme.2018.10.001.
Chen, Tianyi, Yang, Ying, He, Li, Tyburska-Püschel, Beata, Sridharan, Kumar, Xu, Haixuan, & Tan, Lizhen. Enhanced diffusion of Cr in 20Cr-25Ni type alloys under proton irradiation at 670 °C. United States. doi:10.1016/j.nme.2018.10.001.
Chen, Tianyi, Yang, Ying, He, Li, Tyburska-Püschel, Beata, Sridharan, Kumar, Xu, Haixuan, and Tan, Lizhen. Tue . "Enhanced diffusion of Cr in 20Cr-25Ni type alloys under proton irradiation at 670 °C". United States. doi:10.1016/j.nme.2018.10.001.
@article{osti_1478543,
title = {Enhanced diffusion of Cr in 20Cr-25Ni type alloys under proton irradiation at 670 °C},
author = {Chen, Tianyi and Yang, Ying and He, Li and Tyburska-Püschel, Beata and Sridharan, Kumar and Xu, Haixuan and Tan, Lizhen},
abstractNote = {Alloy 709 (Fe-20Cr-25Ni-1.5Mo-0.26Nb in weight percentages) and its model alloy (Fe-20Cr-25Ni) were subjected to 2 MeV proton irradiation up to 1.5 displacements per atom at ~670 °C for 90 h. Significant compositional changes were observed in the irradiated zone of both alloys, which was correlated with the radiation-enhanced diffusion. The radiation-enhanced diffusion coefficient of Cr was experimentally determined by fitting the Cr depletion profiles and theoretically analyzed considering vacancy-assisted lattice diffusion, dislocation pipeline diffusion, etc. The estimation of the radiation-enhanced diffusion in the 20Cr-25Ni type alloy in this study is useful in predicting its performance in radiation damage environment. In conclusion, the methodology of investigating radiation-enhanced diffusion adds to the nuclear-material screening capability of ion-irradiation technologies.},
doi = {10.1016/j.nme.2018.10.001},
journal = {Nuclear Materials and Energy},
issn = {2352-1791},
number = C,
volume = 17,
place = {United States},
year = {2018},
month = {10}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1016/j.nme.2018.10.001

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