University of Oulu

Liu, P., Si, W., Zhang, D., Dai, S., Jiang, B., Shu, D., Wu, L., Zhang, C., & Zhang, M. (2022). Microstructure and friction properties of cocrfemnnitix high-entropy alloy coating by laser cladding. Materials, 15(13), 4669.

Microstructure and friction properties of CoCrFeMnNiTix high-entropy alloy coating by laser cladding

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Author: Liu, Pengfei1; Si, Wudong2; Zhang, Dabin1;
Organizations: 1School of Mechanical Engineering, Guizhou University, Guiyang 550025, China
2School of Mechanical Engineering, Anhui Polytechnic University, Wuhu 241000, China
3Nano and Molecular Systems Research Unit, Faculty of Science, University of Oulu, FIN-90014 Oulu, Finland
4School of Materials Science and Engineering, Nanjing Institute of Technology, Nanjing 211167, China
5Anhui Honggu Laser Co., Ltd., Wuhu 241299, China
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 5.4 MB)
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Language: English
Published: Multidisciplinary Digital Publishing Institute, 2022
Publish Date: 2023-02-21


To enhance the friction and wear properties of 40Cr steel’s surface, CoCrFeMnNi high-entropy alloy (HEA) coatings with various Ti contents were prepared using laser cladding. X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive spectroscopy (EDS) were used to characterize the phase composition, microstructure, and chemical composition of the samples. The findings demonstrated that the CoCrFeMnNiTix HEA coatings formed a single FCC phase. Fe2Ti, Ni3Ti, and Co2Ti intermetallic compounds were discovered in the coatings when the molar ratio of Ti content was greater than 0.5. The EDS findings indicated that Cr and Co/Ni/Ti were primarily enriched in the dendrite and interdendrite, respectively. Ti addition can effectively enhance the coating’s mechanical properties. The hardness test findings showed that when the molar ratio of Ti was 0.75, the coating’s microhardness was 511 HV0.5, which was 1.9 times the hardness of the 40Cr (256 HV0.5) substrate and 1.46 times the hardness of the CrCrFeMnNi HEA coating (348 HV0.5). The friction and wear findings demonstrated that the addition of Ti can substantially reduce the coating’s friction coefficient and wear rate. The coating’s wear resistance was the best when the molar ratio of Ti was 0.75, the friction coefficient was 0.296, and the wear amount was 0.001 g. SEM and 3D morphology test results demonstrated that the coating’s wear mechanism changed from adhesive wear and abrasive wear to fatigue wear and abrasive wear with the increase in Ti content.

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Series: Materials
ISSN: 1996-1944
ISSN-E: 1996-1944
ISSN-L: 1996-1944
Volume: 15
Issue: 13
Article number: 4669
DOI: 10.3390/ma15134669
Type of Publication: A1 Journal article – refereed
Field of Science: 114 Physical sciences
216 Materials engineering
Funding: This work was financially supported by the Science and Technology Support Project of Guizhou Science and Technology Department (No. [2020]2Y041), the Collaborative Innovation Fund project of Anhui Polytechnic University & Fanchang District (No. 2021fccyxtb6), the Fund Project of Industrial Collaborative Innovation of Anhui Polytechnic University & Fanchang District (2021cyxtb6), Guizhou Provincial Science and Technology Projects (GCC[2022]007-1).
Copyright information: © 2022 by the authors. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (