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

Yang, Y. and Ren, Y. and Tian, Y. and Li, K. and Zhang, W. and Shan, Q. and Huang, Q. and Wu, H. (2021) Microstructure and properties of FeCoCrNiMoSix high-entropy alloys fabricated by spark plasma sintering. Journal of Alloys and Compounds, 884: 161070. ISSN 0925-8388

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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.

Item Type:
Journal Article
Journal or Publication Title:
Journal of Alloys and Compounds
Additional Information:
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
Uncontrolled Keywords:
?? corrosion resistancefecocrnihigh-entropy alloysispark plasma sinteringtribological behaviormaterials chemistrymechanics of materialsmetals and alloysmechanical engineering ??
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16 Aug 2021 09:05
Last Modified:
26 Apr 2024 02:46