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Microstructure and Mechanical Properties of High-Entropy Alloy Co20Cr26Fe20Mn20Ni14 Processed by High-Pressure Torsion at 77 K and 300 K

Scientific reports, 2018-07, Vol.8 (1), p.1-12, Article 11074 [Peer Reviewed Journal]

2018. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. ;The Author(s) 2018 ;ISSN: 2045-2322 ;EISSN: 2045-2322 ;DOI: 10.1038/s41598-018-29446-y ;PMID: 30038305

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  • Title:
    Microstructure and Mechanical Properties of High-Entropy Alloy Co20Cr26Fe20Mn20Ni14 Processed by High-Pressure Torsion at 77 K and 300 K
  • Author: Moon, Jongun ; Qi, Yuanshen ; Tabachnikova, Elena ; Estrin, Yuri ; Choi, Won-Mi ; Joo, Soo-Hyun ; Lee, Byeong-Joo ; Podolskiy, Aleksey ; Tikhonovsky, Mikhail ; Kim, Hyoung Seop
  • Subjects: Data processing ; Dislocation ; Mechanical properties ; Microstructure ; Pressure ; Scanning electron microscopy ; Transformation ; Transmission electron microscopy ; X-ray diffraction
  • Is Part Of: Scientific reports, 2018-07, Vol.8 (1), p.1-12, Article 11074
  • Description: In this work, the mechanical characteristics of high-entropy alloy Co20Cr26Fe20Mn20Ni14 with low-stacking fault energy processed by cryogenic and room temperature high-pressure torsion (HPT) were studied. X-ray diffraction, scanning electron microscopy (SEM), and transmission electron microscopy (TEM) analyses were performed to identify the phase and microstructure variation and the mechanical properties characterized by Vickers hardness measurements and tensile testing. Cryogenic HPT was found to result in a lower mechanical strength of alloy Co20Cr26Fe20Mn20Ni14 than room temperature HPT. Microstructure analysis by SEM and TEM was conducted to shed light on the microstructural changes in the alloy Co20Cr26Fe20Mn20Ni14 caused by HPT processing. Electron microscopy data provided evidence of a deformation-induced phase transformation in the alloy processed by cryogenic HPT. Unusual softening phenomena induced by cryogenic HPT were characterized by analyzing the dislocation density as determined from X-Ray diffraction peak broadening.
  • Publisher: London: Nature Publishing Group
  • Language: English
  • Identifier: ISSN: 2045-2322
    EISSN: 2045-2322
    DOI: 10.1038/s41598-018-29446-y
    PMID: 30038305
  • Source: PubMed Central
    ProQuest Central
    DOAJ Directory of Open Access Journals
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