Structural Evolution and Mechanical Properties of FeCoNiAlTi HEA Coatings Fabricated by Plasma Surfacing

WANG Yonghong, ZHANG Chunlin, ZHANG Shihan, YU Jianping, LIU Yingfu, JIE Zhiwen

doi:10.16577/j.issn.1001-1560.2025.0060

Materials Protection >

2025 , Vol. 58 >Issue 4: 56 - 69

DOI: https://doi.org/10.16577/j.issn.1001-1560.2025.0060

Structural Evolution and Mechanical Properties of FeCoNiAlTi HEA Coatings Fabricated by Plasma Surfacing

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(a.School of Mechanical Engineering and Automation， b.School of Materials and Metallurgy，University of Science and Technology Liaoning， Anshan 114051， China)

XIE Zhiwen (1979－)， Professor， Ph.D.， Research Focus: Surface Engineering， Tel.: 13065479625， E-mail:xzwustl＠126.com

Online published: 2025-05-23

Supported by

National Key Research and Development Program (2021YFB3702003)

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Abstract

In order to deeply study the influence of the surfacing current on the microstructure and mechanical properties of FeCoNiAlTi highentropy alloy coatings in the plasma surfacing process parameters， five different surfacing currents (140， 160， 180， 200， 220 A) were used for coating preparation， and the microstructure， hardness， wear resistance and tensile properties of the coatings were evaluated by XRD， OM，SEM， micro-Vickers hardness tester， profilometer， friction wear tester and universal testing machine， respectively.Results showed that the porosity and elemental segregation of the coating were significantly improved with the increase of the surfacing current，but there was no significant effect on the coating phase composition.The coating mainly consisted of the typical FCC solid solution phase and Co3 Ti precipitation phase.When the surfacing current was 180 A， the surface microhardness of the obtained T3 coating was up to 322.77 HV0.2， which was about twice that of the substrate.At the same time， the T3 coating showed the best wear resistance， with a maximum wear depth of only 2.144 μm， an average friction coefficient of 0.362 and the lowest wear rate of 3.83×10－6 mm3/(N·m).In addition， the tensile strength and elongation of the T3 coating were 948 MPa and 26.61%， respectively， showing excellent strength and toughness.

Key words： high-entropy alloys; plasma surfacing; surfacing current; frictional wear; tensile properties

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WANG Yonghong, ZHANG Chunlin, ZHANG Shihan, YU Jianping, LIU Yingfu, JIE Zhiwen . Structural Evolution and Mechanical Properties of FeCoNiAlTi HEA Coatings Fabricated by Plasma Surfacing[J]. Materials Protection, 2025 , 58(4) : 56 -69 . DOI: 10.16577/j.issn.1001-1560.2025.0060

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