Microstructure and Corrosion Properties of La2Zr2O7/NiCoAlY Thermal Barrier Coatings Deposited on Inconel 718 Superalloy by Laser Cladding

Huang, Kaimin; Li, Wei; Pan, Kai; Lin, Xin; Wang, Aihua

doi:10.3390/coatings11010101

Cited by 8 publications

(2 citation statements)

References 37 publications

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“…Ni-Co-based superalloys have been widely used in the discs of industrial gas turbines for their superior combination of service performance that includes excellent hightemperature strength, oxidation resistance, creep resistance, and fatigue properties [1]. In view of the unmatched mechanical properties of the present superalloys employed in gas turbines that demand a higher thrust-weight ratio and thermal efficiency, developing new superalloys with better service properties and designing advanced coatings with special protective effects are often seen as feasible approaches [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Refining Micron-Sized Grains to Nanoscale in Ni-Co Based Superalloy by Quasistatical Compressive Deformation at High Temperature

Xu,

Guo,

Wang

et al. 2023

Coatings

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Compressive deformation was carried out in an Ni-Co-based superalloy with relatively low stacking fault energy (SFE) at 725 °C and a strain rate of 10−2 s−1; the underlying micromechanisms were investigated under true compression strains varying from 0.1 to 1.0. It was found that dislocation slipping accompanied by stacking fault (SF) shearing dominated the compressive deformation under the strain of 0.1 and 0.2. As the strain increased to 0.3 and 0.4, microtwinning was activated and then interacted with dislocations, leading to the formation of dislocation tangles or blocky distorted region. When true strain was further increased to 0.6, abundant subgains (SGs) with polygonous shape appeared and then transformed into nanograins as true strain increased to 1.0. It is demonstrated that high strain and microtwinning are the prerequisites for the evolution of nanograins in the deformed Ni-Co-based superalloy. High strain can produce plentiful dislocations and distorted micro-sized SGs; then the microtwins sheared these distorted regions and refined the micro-sized SGs into nanoscale, which subsequently transformed into nanograins with further deformation.

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Section: Introductionmentioning

confidence: 99%

Refining Micron-Sized Grains to Nanoscale in Ni-Co Based Superalloy by Quasistatical Compressive Deformation at High Temperature

Xu,

Guo,

Wang

et al. 2023

Coatings

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“…Inconel 718 (IN718) is a high-strength precipitation-hardening nickel-base alloy that has exceptional characteristics, including excellent mechanical properties in severe conditions, low creep at high temperatures, high oxidation resistance and hot corrosion resistance up to 650°C, as well as good welding behavior [16,24,25] Therefore, it is extensively used in various industries, such as petrochemical industries aerospace and marine.…”

Section: Introductionmentioning

confidence: 99%

Tribology and corrosion behavior of gray cast iron brake discs coated with Inconel 718 by direct energy deposition

Chioibasu

Mihai

Cotruț

et al. 2022

Int J Adv Manuf Technol

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There has been an increased concern related to environmental pollution, caused by the emission of particles released during the braking process. In the future, environmental safety laws will be increasingly restrictive and the development of new viable alternative technologies will be inherent. Because gray cast iron (GCI) has a low cost and mechanical properties compatible with this type of application, it will be difficult to identify a similar material to replace it. In the case of vehicles that serve passenger transport, the most convenient solution is to cover the brake discs made of GCI with materials that reduce wear and corrosion, but which at the same time maintain or improve their functional performance. This research aims to improve the mechanical properties of the brake discs by laser cladding using Inconel 718 (IN718) metallic powder by Direct Energy Deposition (DED) method. The interface between substrate and the deposited material was uniform, forming a compact bonding of the two materials. The average hardness of the IN718 deposited material was twice higher than the one of the GCI substrates. The friction coefficient (CoF) of the IN718 coatings was higher by 0.12 compared with the substrate material. The depth of the wear track for the layers deposited with IN718 was -50 µm, while the depth of the wear track of the exposed substrate GCI was 3 times higher (-150 µm). The corrosion resistance of the coating was superior by four orders of magnitude to that of GCI substrate in 3.5 wt.% NaCl aqueous solution.

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Investigation on bi-layer coating with La2(Ti0.2Zr0.2Sn0.2Ce0.2Hf0.2)2O7/YSZ prepared by laser cladding

Zhang

Feng

Song

et al. 2023

Ceramics International

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Microstructure and Corrosion Properties of La2Zr2O7/NiCoAlY Thermal Barrier Coatings Deposited on Inconel 718 Superalloy by Laser Cladding

Cited by 8 publications

References 37 publications

Refining Micron-Sized Grains to Nanoscale in Ni-Co Based Superalloy by Quasistatical Compressive Deformation at High Temperature

Refining Micron-Sized Grains to Nanoscale in Ni-Co Based Superalloy by Quasistatical Compressive Deformation at High Temperature

Tribology and corrosion behavior of gray cast iron brake discs coated with Inconel 718 by direct energy deposition

Investigation on bi-layer coating with La2(Ti0.2Zr0.2Sn0.2Ce0.2Hf0.2)2O7/YSZ prepared by laser cladding

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