Mechanisms of radiation-induced segregation in CrFeCoNi-based single-phase concentrated solid solution alloys
Abstract
Single-phase concentrated solid solution alloys have attracted wide interest due to their superior mechanical properties and enhanced radiation tolerance, which make them promising candidates for the structural applications in next-generation nuclear reactors. However, little has been understood about the intrinsic stability of their as-synthesized, high-entropy configurations against radiation damage. In this paper, we report the element segregation in CrFeCoNi, CrFeCoNiMn, and CrFeCoNiPd equiatomic alloys when subjected to 1250 kV electron irradiations at 400 °C up to a damage level of 1 displacement per atom. Cr/Fe/Mn/Pd can deplete and Co/Ni can accumulate at radiation-induced dislocation loops, while the actively segregating elements are alloy-specific. Moreover, electron-irradiated matrix of CrFeCoNiMn and CrFeCoNiPd shows L10 (NiMn)-type ordering decomposition and <001>-oriented spinodal decomposition between Co/Ni and Pd, respectively. Finally, these findings are rationalized based on the atomic size difference and enthalpy of mixing between the alloying elements, and identify a new important requirement to the design of radiation-tolerant alloys through modification of the composition.
- Authors:
-
- Univ. of Wisconsin, Madison, WI (United States). Dept. of Engineering Physics
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division
- Kyushu Univ., Fukuoka (Japan). Dept. of Applied Quantum Physics and Nuclear Engineering
- Kyushu Univ., Fukuoka (Japan). Dept. of Materials Science and Engineering
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Univ. of Wisconsin, Madison, WI (United States); Kyushu Univ., Fukuoka (Japan); Energy Frontier Research Centers (EFRC) (United States). Energy Dissipation to Defect Evolution (EDDE)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1340453
- Alternate Identifier(s):
- OSTI ID: 1419999
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Acta Materialia
- Additional Journal Information:
- Journal Volume: 126; Journal ID: ISSN 1359-6454
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; Electron microscopy; Irradiated metals; Phase transformation; Segregation; Single-phase concentrated solid solution alloys
Citation Formats
He, Mo-Rigen, Wang, Shuai, Shi, Shi, Jin, Ke, Bei, Hongbin, Yasuda, Kazuhiro, Matsumura, Syo, Higashida, Kenji, and Robertson, Ian M. Mechanisms of radiation-induced segregation in CrFeCoNi-based single-phase concentrated solid solution alloys. United States: N. p., 2016.
Web. doi:10.1016/j.actamat.2016.12.046.
He, Mo-Rigen, Wang, Shuai, Shi, Shi, Jin, Ke, Bei, Hongbin, Yasuda, Kazuhiro, Matsumura, Syo, Higashida, Kenji, & Robertson, Ian M. Mechanisms of radiation-induced segregation in CrFeCoNi-based single-phase concentrated solid solution alloys. United States. https://doi.org/10.1016/j.actamat.2016.12.046
He, Mo-Rigen, Wang, Shuai, Shi, Shi, Jin, Ke, Bei, Hongbin, Yasuda, Kazuhiro, Matsumura, Syo, Higashida, Kenji, and Robertson, Ian M. Sat .
"Mechanisms of radiation-induced segregation in CrFeCoNi-based single-phase concentrated solid solution alloys". United States. https://doi.org/10.1016/j.actamat.2016.12.046. https://www.osti.gov/servlets/purl/1340453.
@article{osti_1340453,
title = {Mechanisms of radiation-induced segregation in CrFeCoNi-based single-phase concentrated solid solution alloys},
author = {He, Mo-Rigen and Wang, Shuai and Shi, Shi and Jin, Ke and Bei, Hongbin and Yasuda, Kazuhiro and Matsumura, Syo and Higashida, Kenji and Robertson, Ian M.},
abstractNote = {Single-phase concentrated solid solution alloys have attracted wide interest due to their superior mechanical properties and enhanced radiation tolerance, which make them promising candidates for the structural applications in next-generation nuclear reactors. However, little has been understood about the intrinsic stability of their as-synthesized, high-entropy configurations against radiation damage. In this paper, we report the element segregation in CrFeCoNi, CrFeCoNiMn, and CrFeCoNiPd equiatomic alloys when subjected to 1250 kV electron irradiations at 400 °C up to a damage level of 1 displacement per atom. Cr/Fe/Mn/Pd can deplete and Co/Ni can accumulate at radiation-induced dislocation loops, while the actively segregating elements are alloy-specific. Moreover, electron-irradiated matrix of CrFeCoNiMn and CrFeCoNiPd shows L10 (NiMn)-type ordering decomposition and <001>-oriented spinodal decomposition between Co/Ni and Pd, respectively. Finally, these findings are rationalized based on the atomic size difference and enthalpy of mixing between the alloying elements, and identify a new important requirement to the design of radiation-tolerant alloys through modification of the composition.},
doi = {10.1016/j.actamat.2016.12.046},
journal = {Acta Materialia},
number = ,
volume = 126,
place = {United States},
year = {Sat Dec 31 00:00:00 EST 2016},
month = {Sat Dec 31 00:00:00 EST 2016}
}
Web of Science
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