Multi-Objective Optimization of Process Parameters in Laser Cladding CoCrCuFeNi High-Entropy Alloy Coating

Huang, Yubin; Hu, Yongle; Zhang, Mingjun; Mao, Cong; Wang, Kaiming; Tong, Yonggang; Zhang, Jian; Li, Kangwei

doi:10.1007/s11666-022-01408-x

Cited by 24 publications

(7 citation statements)

References 53 publications

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“…The aspect ratio refers to the ratio between the width and depth of the cladding area obtained through laser cladding, which can affect the cladding quality and efficiency. If the aspect ratio is too large or too small, it may lead to uneven or incomplete melting during the cladding process, thereby affecting the processing quality and efficiency [31]. Figure 2 shows the geometric characteristics of the cross section of the laser-cladded layer, and the calculations of the geometric dilution rate and aspect ratio are given by Equations ( 1) and (2).…”

Section: Microstructurementioning

confidence: 99%

Effect of WC Content on the Wear and Corrosion Properties of Oscillating Laser-Cladding-Produced Nickel-Based Coating

Li,

Zhang,

Liu

et al. 2023

Coatings

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Pneumatic conveying pipe is an important part of the coal industry. Its working environment is harsh, and it is mainly affected by serious wear and corrosion, which affects its operating life. Studying a method of strengthening the pipe wall of pneumatic conveying pipe is of great significance. In this paper, nickel-based alloy coatings with different WC (tungsten carbide) contents were prepared using an oscillating laser-cladding process, and the micro-characterization characteristics, wear resistance and corrosion resistance of the laser-cladded layer were discussed. The main conclusions are as follows: The microstructure of the laser-cladded layer gradually grows from the plane crystals and cellular crystals at the bottom to the relatively coarse columnar crystals in the middle, and finally to a large number of equiaxed crystals in the upper part. Moreover, with an increase in WC content, more fine equiaxed crystals are formed, mainly due to the decrease in temperature gradient with the increase in distance from the fusion line. Also, with an increase in WC content, the hardness and wear resistance of the nickel-based alloy are improved. When 20% WC is added, the laser-cladded layer shows the best corrosion resistance in 3.5 wt.% NaCl solution, and its polarization resistance is 16% lower than that when 10% WC is added. This study provides a technical reference for improving the operating life of pneumatic conveying pipelines.

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Section: Microstructurementioning

confidence: 99%

Effect of WC Content on the Wear and Corrosion Properties of Oscillating Laser-Cladding-Produced Nickel-Based Coating

Li,

Zhang,

Liu

et al. 2023

Coatings

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“…The microstructures of the regions above the fusion zone gradually changed from planar crystal to columnar crystal and cellular crystal, while the middle and upper parts of the coating mainly consisted of equiaxed crystals. The microstructures inside the coating are mainly associated with temperature gradient (G) and solidification rate (R), analyzed in G/R [32]. At the initial stage of solidification, the temperature gradient of the fusion zone was relatively large, but the solidification rate was relatively low [33].…”

Section: Microstructurementioning

confidence: 99%

Effect of WC on Microstructure and Wear Resistance of Fe-Based Coating Fabricated by Laser Cladding

Wei

Tang²,

Tong

et al. 2022

Coatings

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As the core component of the wind turbine transmission chain, the wind power gear plays a vital role in the safe and efficient operation of the whole machine. Wind power gears are subjected to varying degrees of wear on their contact surfaces due to alternating load impacts. For wind power gear repair and remanufacturing, laser cladding technology is proposed on the wind power gearbospline shaft. The effect of tungsten carbide (WC) addition on the laser-clad Fe-based coatings was investigated in this study. The morphology and composition of the composite coatings formed with different proportions of WC were studied using scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDS). The microhardness and wear resistance were measured with a digital microhardness tester and a wear testing machine, respectively. The coatings were compact with no apparent cracks or pores and the microstructures of the regions above the fusion zone gradually changed from planar crystal to columnar crystal and cellular crystal, while the middle and upper parts of the coating mainly consisted of equiaxed crystals. The microhardness of the coatings gradually increased with the increase of WC content. The coating with 16% WC addition reached a maximum microhardness of 826.2 HV. The increase of WC content improved the wear resistance of the laser-clad Fe-based composite coatings. The wear mechanism of the coatings was mainly abrasive wear, along with slight adhesion wear and oxidative wear.

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“…However, different coating preparation methods led to some variations in phase structures and microstructures of HEAs. 14,15 Presently, the main methods for preparing HEACs included thermal spray, 16 electrochemical deposition, 17 magnetron sputtering, 18 laser cladding, 19 and plasma spraying. 20 Dang et al 21 prepared CoCrFeNiMn HEAC films by high vacuum radio frequency (RF) magnetron sputtering technique.…”

Section: Introductionmentioning

confidence: 99%

Effect of Cu on microstructure and properties of Co₂CrFeNiMnCu_x high-entropy alloy coatings prepared by laser cladding

Hu,

Zhu,

Peng

et al. 2024

Surface Engineering

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High-entropy alloy coatings (HEACs) of Co2CrFeNiMnCu x ( x = 0, 0.25, 0.5, 0.75, 1.0, 1.25) were fabricated on Q235 steel surfaces by laser cladding. A portion of the HEACs ( x = 0, 0.5 and 1.25) displayed a dual-phase FCC structure, while the remaining portion ( x = 0.25, 0.75 and 1.0) exhibited a single-phase FCC structure. Furthermore, as the Cu content increased, the grain size of the coatings became finer and elongated. Due to the unique processing technology of laser cladding, the HEACs exhibited a hardness gradient from the top to the substrates. Cu segregated within the crystal and accumulated near the grain boundaries. The primary mechanism for protecting the steel substrate through coatings was passive films protection. Remarkably, the coatings demonstrated better anti-corrosion properties when the Cu content was 0.25, with a charge transfer resistance of 9.528 × 104 Ω cm2, corrosion potential of −0.387 V and corrosion current density of 3.125 × 10−7 A/cm2.

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Multi-Objective Optimization of Process Parameters in Laser Cladding CoCrCuFeNi High-Entropy Alloy Coating

Cited by 24 publications

References 53 publications

Effect of WC Content on the Wear and Corrosion Properties of Oscillating Laser-Cladding-Produced Nickel-Based Coating

Effect of WC Content on the Wear and Corrosion Properties of Oscillating Laser-Cladding-Produced Nickel-Based Coating

Effect of WC on Microstructure and Wear Resistance of Fe-Based Coating Fabricated by Laser Cladding

Effect of Cu on microstructure and properties of Co₂CrFeNiMnCu_x high-entropy alloy coatings prepared by laser cladding

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Multi-Objective Optimization of Process Parameters in Laser Cladding CoCrCuFeNi High-Entropy Alloy Coating

Cited by 24 publications

References 53 publications

Effect of WC Content on the Wear and Corrosion Properties of Oscillating Laser-Cladding-Produced Nickel-Based Coating

Effect of WC Content on the Wear and Corrosion Properties of Oscillating Laser-Cladding-Produced Nickel-Based Coating

Effect of WC on Microstructure and Wear Resistance of Fe-Based Coating Fabricated by Laser Cladding

Effect of Cu on microstructure and properties of Co2CrFeNiMnCux high-entropy alloy coatings prepared by laser cladding

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Effect of Cu on microstructure and properties of Co₂CrFeNiMnCu_x high-entropy alloy coatings prepared by laser cladding