Investigation on crack behavior of Ni60A alloy coating produced by coaxial laser cladding

Shi, Baohui; Tao, Li; Wang, Dong; Zhang, Xiaorui; Zhang, Hongchao

doi:10.1007/s10853-021-06108-5

Cited by 19 publications

(4 citation statements)

References 30 publications

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“…where H i,T and S i,T represent molar enthalpy and molar entropy, respectively. The change in Gibbs free energy for Equation (1) can be shown by Equation (3):…”

Section: Phase Composition Analysismentioning

confidence: 99%

“…The produced NiCrBSi coating shows good wear resistance, high-temperature oxidation resistance, and optimum substrate wettability. These coatings are widely used to coat the surfaces of various mechanical parts for better mechanical properties and corrosion resistance [3][4][5]. Nowadays, the composite coatings prepared by adding different reinforcements like titanium carbide (TiC) [6], alumina (Al 2 O 3 ) [7], silicon carbide (SiC) [8], etc., are widely used in aerospace, automotive, and other industries because of their several advantages like higher hardness and better wear and corrosion resistance.…”

Section: Introductionmentioning

confidence: 99%

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Microstructure and corrosion behaviour of WC/NiCrBSi coatings by vacuum cladding

Zhang

Wang

et al. 2022

Materials Science and Technology

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In this work, the WC-NiCrBSi and in-situ synthesised WC (IWC)-NiCrBSi coatings were successfully fabricated on SS 316 L using vacuum cladding process to investigate the WC-reinforced NiCrBSi alloy by the two methods. XRD, SEM and EDS were performed to characterise the phase constituents, microstructure and chemical composition, respectively. Subsequently, electrochemical corrosion and cavitation tests of the coatings were carried out in 3.5 wt-% NaCl solution. The results showed that the WC-NiCrBSi cladding coating was mainly composed of γ-Ni, FeNi3, WC, Cr23C6 and CrB phases, while the IWC-NiCrBSi cladding coating was composed of γ-Ni, WC, FeNi3, Cr23C6, Cr7C3, CrB phases. The corrosion current density of the WC-NiCrBSi and IWC-NiCrBSi coatings were 5.01 × 10−7 and 3.57 × 10−7 A/cm2, respectively. The combined analysis of cumulative weight loss curve and cavitation morphology revealed a better cavitation resistance by the IWC-NiCrBSi coating than the WC-NiCrBSi coating in 3.5 wt-% NaCl solution.

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“…where H i,T and S i,T represent molar enthalpy and molar entropy, respectively. The change in Gibbs free energy for Equation (1) can be shown by Equation (3):…”

Section: Phase Composition Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Microstructure and corrosion behaviour of WC/NiCrBSi coatings by vacuum cladding

Zhang

Wang

et al. 2022

Materials Science and Technology

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“…The cracks in the layer were caused by the difference in thermal expansion coefficient between the WC particles and the matrix of the layer; the residual thermal stress of rapid solidification had not been effectively released, which cracked the WC particles and formed cracks in the layer [26]. As shown in Mark 4, a shadow appeared on the edge of the WC particles in the friction's direction.…”

Section: Wear Testmentioning

confidence: 99%

Microstructure and Wear Properties of Laser Cladding WC/Ni-Based Composite Layer on Al–Si Alloy

Zhang

2021

Materials

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The microstructural and wear properties of laser-cladding WC/Ni-based layer on Al–Si alloy were investigated by scanning electron microscope (SEM), X-ray diffraction (XRD), energy dispersive spectrometer (EDS) and wear-testing. The results show that, compared with the original specimen, the microhardness and wear resistance of the cladding layer on an Al–Si alloy were remarkably improved, wherein the microhardness of the layer achieved 1100 HV and the average friction coefficient of the layer was barely 0.14. The mainly contributor to such significant improvement was the generation of a WC/Ni-composite layer of Al–Si alloy during laser cladding. Two types of carbides, identified as M7C3 and M23C6, were found in the layer. The wear rate of the layer first increased and then decreased with the increase in load; when the load was 20 N, 60 N and 80 N, the wear rate of layer was1.89 × 10−3 mm3·m−1, 3.73 × 10−3 mm3·m−1 and 2.63 × 10−3 mm3·m−1, respectively, and the average friction coefficient (0.14) was the smallest when the load was 60 N.

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“…NiCrBSi покрытия, сформированные лазерной наплавкой, могут быть применены для предотвращения износа, коррозии, эрозии и окисления поверхности деталей при высоких температурах [3][4][5]. В литературе отмечается положительное влияние бора в составе NiCrBSi покрытий в связи с формированием боридов в структуре покрытий, в результате чего повышается твердость покрытий, а также их стойкость к окислению и коррозии при повышенных температурах [6; 7].…”

Section: Introductionunclassified

The Influence of Boron Carbide Additive on the Structure and Hardness of a Nickel-Based Coating

Starikova¹,

Соболева²,

Makarov³

et al. 2021

FMT

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Laser cladding is increasingly frequently used in various branches of mechanical engineering since it has such advantages over traditional methods of depositing coatings as high heating and cooling rates and minimal mixing of base and melting materials. Laser-clad coatings are usually characterized by a fine-grained structure and a minimal heat-affected zone. Coatings formed from the Ni–Cr–B–Si powders are also very common in industrial applications, as they have good resistance to wear, corrosion, erosion, etc. Various strengthening particles can be added to this group of powders to improve the properties of the deposited coating. Boron carbides can act as such particles since they have high hardness, thermodynamic stability, and wear resistance. In this regard, the paper investigated the influence of the 7 wt. % of boron carbide B4C addition on the structure and hardness of the NiCrBSi coating formed by laser cladding of PG-SR2 powder on the surface of 30HRA steel. Using the scanning electron microscope, the authors carried out microscopic studies of the structure of NiCrBSi and NiCrBSi–B4C coatings and presented the results of X-ray spectral microanalysis. The study shows that the structures of both coatings in the deposited state are characterized by uniformity and fine-grain structure. The investigation revealed that the samples with NiCrBSi and NiCrBSi–B4C coatings have a narrow transition zone from the deposit to the base metal. The paper presents the results of measuring the microhardness of coatings indicating a decrease in the microhardness of laser-clad nickel-based coatings with the boron carbide addition.

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Investigation on crack behavior of Ni60A alloy coating produced by coaxial laser cladding

Cited by 19 publications

References 30 publications

Microstructure and corrosion behaviour of WC/NiCrBSi coatings by vacuum cladding

Microstructure and corrosion behaviour of WC/NiCrBSi coatings by vacuum cladding

Microstructure and Wear Properties of Laser Cladding WC/Ni-Based Composite Layer on Al–Si Alloy

The Influence of Boron Carbide Additive on the Structure and Hardness of a Nickel-Based Coating

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