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    Rights statement: This is the author’s version of a work that was accepted for publication in Journal of Alloys and Compounds. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Alloys and Compounds, 884, 2021 DOI: 10.1016/j.jallcom.2021.161070

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    Embargo ends: 6/07/22

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Microstructure and properties of FeCoCrNiMoSix high-entropy alloys fabricated by spark plasma sintering

Research output: Contribution to journalJournal articlepeer-review

E-pub ahead of print
  • Y. Yang
  • Y. Ren
  • Y. Tian
  • K. Li
  • W. Zhang
  • Q. Shan
  • Q. Huang
  • H. Wu
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Article number161070
<mark>Journal publication date</mark>5/12/2021
<mark>Journal</mark>Journal of Alloys and Compounds
Volume884
Number of pages9
Publication StatusE-pub ahead of print
Early online date6/07/21
<mark>Original language</mark>English

Abstract

FeCoCrNiMoSix (x = 0.5, 1.0, 1.5) high-entropy alloys (HEAs) were successfully fabricated by spark plasma sintering (SPS). The microstructure, tribological properties, oxidation behaviors and corrosion resistance of the HEAs were systematically investigated. The experimental results showed that the microstructure mainly consisted of Fe-rich face-centered-cubic (FCC) phase, Mo-rich FCC phase solid solution and various Si-rich intermetallics, where the elevated Si content coarsened the primary Mo-rich phase into dendritic eventually. These Mo-rich dendrites possessed strong covalent-dominant atomic bonds that enhanced the microhardness (from 725 to 1186 HV) and wear resistance. The FeCoCrNiMoSi0.5 HEA exhibited an outstanding combination of relatively high wear resistance and the strongest oxidation resistance under 800 °C among the three alloy compositions. The corrosion resistance of HEAs showed an increasing trend with the elevated Si content, and FeCoCrNiMoSi1.5 presented the best performance.

Bibliographic note

This is the author’s version of a work that was accepted for publication in Journal of Alloys and Compounds. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Alloys and Compounds, 884, 2021 DOI: 10.1016/j.jallcom.2021.161070