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  Effects of nanosized precipitates on irradiation behavior of CoCrFeNi high entropy alloys

Cao, P., Wang, H., He, J., Xu, C., Jiang, S., Du, J., et al. (2021). Effects of nanosized precipitates on irradiation behavior of CoCrFeNi high entropy alloys. Journal of Alloys and Compounds, 859: 158291. doi:10.1016/j.jallcom.2020.158291.

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 Creators:
Cao, Peipei1, Author
Wang, Hui2, Author              
He, Junyang3, Author              
Xu, Chuan4, Author
Jiang, Suihe2, Author              
Du, Jinlong4, Author
Cao, Xingzhong5, Author
Fu, Engang4, Author
Lu, Zhaoping2, Author              
Affiliations:
1Beijing Advanced Innovation Center for Materials Genome Engineering, State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China, ou_persistent22              
2State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China, ou_persistent22              
3Atom Probe Tomography, Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863384              
4State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing, China, ou_persistent22              
5Key Laboratory of Nuclear Analysis Techniques, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China, ou_persistent22              

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Free keywords: Chromium alloys; Cobalt alloys; Defects; Dissolution; Entropy; Hardness; High-entropy alloys; Iron alloys; Radiation, Defect evolution; Dislocation loop; Dissolution process; Irradiation resistance; Nano-sized precipitates; Small variations, Irradiation
 Abstract: Evolution of nanosized precipitates in typical (CoCrFeNi)94Ti2Al4 high entropy alloys under irradiation and its effect on the irradiation resistance were investigated in detail. The as-solutionized samples and the aged samples with massive nanosized precipitates were irradiated at ambient temperatures with a dose ranging from 10 to 49 dpa of 4 MeV Au ions. It was found that the ordered precipitates became disordered quickly at the early stage under 10 dpa irradiation, accompanying with the dissolution process which became more and more severer at higher doses. After irradiation, the hardness slightly changed in the aged specimens containing massive precipitates, but increased bygt; 30 in the as-solutionized ones with no precipitates. The obvious hardness increment in the as-solutionized samples is due to the creation of defects while the small variations of the hardness in the aged specimens can be ascribed to the disordering and dissolution of precipitates. In addition, the size of dislocation loops induced by the irradiation in the aged specimens is much smaller than that in the as-solutionized samples. We confirmed that presence of the nanosized precipitates delayed defect evolution and reduced the sizes of dislocation loops. © 2020 Elsevier B.V.

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Language(s): eng - English
 Dates: 2021-04-05
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1016/j.jallcom.2020.158291
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Title: Journal of Alloys and Compounds
  Abbreviation : J. Alloy. Comp.
Source Genre: Journal
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Publ. Info: Lausanne, Switzerland : Elsevier B.V.
Pages: - Volume / Issue: 859 Sequence Number: 158291 Start / End Page: - Identifier: ISSN: 0925-8388
CoNE: https://pure.mpg.de/cone/journals/resource/954925567746