Effect of W Content on Microstructure and Properties of Laser Cladding CoCrFeNi HEA Coating

The 316L SS surfaces were prepared with CoCrFeNi HEA/W-composite coatings using the laser cladding technique with various mass fractions of W. The mass fractions of W were 10, 20, 30, and 40%. The microstructure of the HEA/W-composite coatings was investigated using a variety of characterization met...

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Bibliographic Details
Published in:Coatings (Basel) 2023-08, Vol.13 (8), p.1301
Main Authors: Luo, Fangyan, Yang, Tuchuan, Zhao, Yang, Xiong, Zhengye, Huang, Jiang
Format: Article
Language:English
Subjects:
Alloys
Analysis
Bonding
Coatings
Cobalt alloys
Composition
Corrosion and anti-corrosives
Corrosion resistance
Corrosion tests
Crystal structure
Electrochemical corrosion
Grains
Hardness
Intermetallic compounds
Laser beam cladding
Lasers
Lattice parameters
Manufacturers
Metal bonding
Metallurgy
Microstructure
Morphology
Properties
Protective coatings
Solid solutions
Structure
Substrates
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Summary:The 316L SS surfaces were prepared with CoCrFeNi HEA/W-composite coatings using the laser cladding technique with various mass fractions of W. The mass fractions of W were 10, 20, 30, and 40%. The microstructure of the HEA/W-composite coatings was investigated using a variety of characterization methods. According to the results, the samples were in the BBC phase. In the SEM images, a solid–liquid bonding layer was observed, which indicates the samples had good metallurgical bonding. The W particles prevented the orderly growth of the HEA grains, and a significant refinement of the grains around the W particles occurred. The lattice constants measured by XRD mapping indicate that adding W particles to CoCrFeNi HEA leads to lattice distortion. The hardness of the HEA/W coatings was substantially higher than the substrate and the pure CoCrFeNi coating by hardness measurements and was greatest at a W content of 40%. The hardness of the HEA/W coatings was significantly increased compared to the substrate and the pure CoCrFeNi coating by hardness measurements and was greatest at a W content of 40%. The HEA/W coating was tested for electrochemical corrosion, and a 10% mass fraction of W achieved the highest level of corrosion resistance.
ISSN:2079-6412
2079-6412
DOI:10.3390/coatings13081301