Microstructure and wear-resistance of the CoCrFeNiMo high entropy alloy coatings by modulated arc currents using plasma transferred arc weld technique

Liu, Ziheng; Liu, Gang; Miao, Xinlei; Sun, Liyang; Han, Zhenhua; Zhang, Guojun

doi:10.1016/j.intermet.2024.108506

Intermetallics

2024

DOI: 10.1016/j.intermet.2024.108506

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Microstructure and wear-resistance of the CoCrFeNiMo high entropy alloy coatings by modulated arc currents using plasma transferred arc weld technique

Ziheng Liu,

Gang Liu,

Xinlei Miao

et al.

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2024

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Effect of Si Addition on Structure and Corrosion Resistance of FeCoNiCr High-Entropy Alloy Coating

Li,

Lian,

Wang

et al. 2024

Materials

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In this study, Fe60Co10−xNi15Cr15Six (x = 0, 4, and 8) powders were successfully prepared using the aerosol method and employed to produce high-entropy coatings on Q235 steel via laser cladding. The microstructure and phase composition of the coatings were analyzed using scanning electron microscopy, energy-dispersive X-ray spectroscopy, and X-ray diffraction. Corrosion resistance and potential were evaluated through electrochemical analysis and Kelvin probe force microscopy. The results show that the Fe60Co10−xNi15Cr15Six coatings exhibit excellent metallurgical bonding with no visible porosity or cracks. The coating primarily consists of an FCC structure; however, as the Si content increases, the structure transitions to a mixed FCC + BCC phase. The addition of Si also refines the grain size in the alloy system. Electrochemical analysis reveals that the Si0 and Si4 coatings exhibit similar corrosion behavior, while the Si8 coating shows a significant drop in corrosion potential, reducing its corrosion resistance. As the Si content increases, grain refinement leads to more grain boundaries, but the corrosion resistance decreases due to the lower corrosion performance of Si compared to Co. Considering both cost and corrosion resistance, the Si4 coating offers a balance of low cost and excellent corrosion resistance.

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Effect of Si Addition on Structure and Corrosion Resistance of FeCoNiCr High-Entropy Alloy Coating

Li,

Lian,

Wang

et al. 2024

Materials

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show abstract

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Microstructure and wear-resistance of the CoCrFeNiMo high entropy alloy coatings by modulated arc currents using plasma transferred arc weld technique

Cited by 1 publication

References 29 publications

Effect of Si Addition on Structure and Corrosion Resistance of FeCoNiCr High-Entropy Alloy Coating

Effect of Si Addition on Structure and Corrosion Resistance of FeCoNiCr High-Entropy Alloy Coating

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