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Microstructural evolution, phase selection and properties of CoCrCuFeMnxNi high-entropy alloys

  • Wendong Du , Ning Liu , Pengjie Zhou , Xiaojing Wang , Bin Wang and Zhen Peng
Published/Copyright: August 30, 2018
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 109 Issue 9

Abstract

Manganese was added to face-centered-cubic (fcc) high-entropy CoCrCuFeNi alloy to investigate the effects of Mn content on the microstructures, phase selection, and properties of CoCrCuFeMnxNi. CoCrCuFeMnxNi showed typical dendrite and interdendritic structures, and nanoprecipitates including Cu-rich cubic and Cr-rich acicular ones, were obtained in the interdendritic region. Calculated phase-selection-related parameters indicated that the formation of fcc phase was favored. Although two fcc structures were detected by X-ray diffraction, the interdendritic region showed body-centered-cubic, Cr-rich nanoprecipitates when x < 0.5. It is worth noting that the CoCrCuFeMn2.0Ni interdendrites showed an amorphous phase. CoCrCuFeMnxNi showed considerable ductility and increasing compressive strengths with increasing Mn content.

Keywords: High-entropy alloy; Phase selection; Microstructure; Precipitates; Properties
*Correspondence address, Dr. Ning Liu, School of Materials Science and Engineering, Jiangsu University of Science and Technology, No. 2 Mengxi Road, Zhenjiang, Jiangsu, 212003, P. R. China, Tel.: +86-511-84407569, Fax: +86-511-84407381, E-mail:

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Received: 2017-12-25
Accepted: 2018-05-17
Published Online: 2018-08-30
Published in Print: 2018-09-14

© 2018, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.111679
Keywords for this article
High-entropy alloy; Phase selection; Microstructure; Precipitates; Properties

Articles in the same Issue

  1. Contents
  2. Contents
  3. Original Contributions
  4. Effect of lubricant additives on the tribological behavior of aluminum alloy against steel
  5. First evidence of grain boundary serration in a specifically heat treated wrought Alloy 625 Ni-based superalloy
  6. Precipitation characteristics of a nickel-based single-crystal superalloy after long-term thermal exposure
  7. Dynamic evolution of the metastable structure and nano-precipitation of 7055 aluminum alloy under thermal deformation
  8. Microstructural evolution and high-temperature compressive properties of an extruded Mg–Dy–Zn alloy sheet
  9. Microstructural characterization and residual stress distribution in a nanostructured austenitic stainless steel
  10. Microstructural evolution, phase selection and properties of CoCrCuFeMnxNi high-entropy alloys
  11. Thermodynamic modelling of the Hf–Pt system
  12. Mechanical, tribological and oxidation resistance properties of Ni-based self-lubricating composite coatings at elevated temperature by APS
  13. Pore formation mechanism of porous Ni–Cr–Al alloys prepared by elemental powder reactive synthesis
  14. Co3O4/carbon nano-onions composite as supercapacitor electrode and its excellent electrochemical performance
  15. Short Communications
  16. Reduced graphene oxide–SnO nanocomposites with good visible-light photoactivity
  17. DGM News
  18. DGM News
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