Improving oxidation resistance of wire arc additive manufactured Inconel 625 Ni-based superalloy by pack aluminizing

Bölükbaşı, Ömer Saltuk; Serindağ, Tarık; Gürol, Uğur; Günen, Ali; Çam, Gürel

doi:10.1016/j.cirpj.2023.07.011

Cited by 41 publications

(2 citation statements)

References 51 publications

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“…In view of this aspect, the aluminide coating 3 has been regarded as one of the most efficient and widely utilised protective layering techniques because of its low cost, simple manufacture, and superior oxidation resistance. Omer et al 4 introduced a dense aluminide coating with a thickness of approximately 35 μm and obtain approximately 2.65 times better oxidation resistance than the non-aluminised IN625 alloys. Injection laser cladding was used by Bita et al 5 to aluminise IN738 alloy and attain a high resistance against the hot corrosion.…”

Section: Introductionmentioning

confidence: 99%

Effects of aluminised-coating on microstructure and properties of Ni–Co-base superalloys

Hong,

Li,

Liu

et al. 2024

Surface Engineering

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A Ni–Co-base superalloy was subjected to three different pack aluminising procedures (1000 °C for 3.5 h, 890 °C for 8 h and 620 °C for 10 h) to produce the Al-rich coating with simultaneously improved oxidation and wear resistance. All samples showed a multi-layer coating made up of (Ni, Fe, Co)Al phase, (Ni, Fe, Co)3Al phase and transition layer. The AT620 sample possessed the lowest oxidation rate but the highest double-edge-notched (DEN) strain during high-temperature stress rupture. The high oxidation resistance might be associated with the creation of Al2O3 layer (∼5.6 μm), contributing to an inhibition of oxygen permeation. However, a premature failure was caused by the strong deformation incompatibility between the substrate and alumina layer. The AT890 samples had higher oxidation and creep-induced-crack resistance than those of the AT1000 samples, which was the result of the effective Al inter-diffusions in the transition layer suppressing the undesirable Cr-rich σ phase.

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Section: Introductionmentioning

confidence: 99%

Effects of aluminised-coating on microstructure and properties of Ni–Co-base superalloys

Hong,

Li,

Liu

et al. 2024

Surface Engineering

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“…In recent years, laser-based processes, such as laser welding, laser additive manufacturing, laser surface melting, laser heat treatment and laser shock have been extensively applied because of their unique features (Cavaliere, 2021). Metal additive manufacturing methods including laser additive manufacturing offer several advantages over conventional production methods, such as less material loss and high production times, and are thus increasingly becoming popular for the production of thin-walled structures from various structural alloys including Ni-based superalloys and steels (Cam, 2022;Bolukbasi et al, 2023;Gunen et al, 2023;Gurol et al, 2023;Kayali et al, 2022;Ceritbinmez et al, 2023). One of the new methods of additive manufacturing that has been developed in recent years is the direct metal deposition (DMD) process.…”

Section: Introductionmentioning

confidence: 99%

Sintering parameter optimization by inverse analysis in direct metal deposition of Inconel 718

Afshari,

Khandaei,

Shoja Razavi

et al. 2024

RPJ

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Purpose The net power delivered to the surface of parts (i.e. the actual heat flux) is a key parameter in the laser melting process and its exact control has a great impact on the numerical solutions. In this paper, the impact of laser additive manufacturing parameters including laser power, scanning speed and powder injection rate on thermal efficiency, net power delivered to the part and power loss due to powder flow has been investigated. Design/methodology/approach The response surface method was applied to measure the net laser power in laser deposited Inconel 718 using k-type thermocouples. The temperature history obtained by thermocouples was used to calculate the net power delivered by inverse analysis method. The applied model is Rosenthal's optimized model, in which all the thermal properties of the material are considered to vary with temperature. Findings The results indicated that the thermal efficiency, power delivered to the part and power loss can be optimized simultaneously at laser power of 400 W, scanning speed of 2 mm/s and powder injection rate of 200 mg/s. The microstructure analysis indicated that a high-quality sample without microstructural defects was formed under optimal condition of parameters. Moreover, the primary dendrite arm spacing for the optimal sample was higher than that obtained for other samples. Originality/value The novelty of this research summarized as follows: Prediction of the thermal efficiency and power loss during the laser metal deposition of Inconel 718 superalloy using the inverse analysis. Finding the optimal values of thermal efficiency, power delivered to the surface and power loss in the laser metal deposition of Inconel 718 superalloy. Investigating the effect of laser power, powder injection rate and scanning speed on the thermal efficiency and power loss of Inconel 718 superalloy during the laser metal deposition.

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High‐Temperature Oxidation Behavior of Hastelloy N Alloy for Molten Salt Reactor at 650–980 °C

Wang,

Li,

et al. 2024

Adv Eng Mater

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Isothermal oxidation of Hastelloy N, a nickel‐based superalloy with low Cr content, is conducted at 650–980 °C in air. The oxide film exhibits a complex structure with outer and inner oxide layers. The outer oxide layer consists of NiO, Fe2O3, NiFe2O4, and MoO2, while NiCr2O4, MnCr2O4, and Cr2O3 are the main phases in the inner oxide layer. At temperatures above 700 °C, the formation of gaseous MoO3 produces cracks and spallation of the outer oxide layer. Moreover, Al2O3 and SiO2 are identified along the grain boundary under the inner oxide layer owing to internal oxidation. The oxidation behavior of Hastelloy N alloy at 650–980 °C is jointly controlled by the chemical reactions at the oxide/alloy interface and the diffusion of Cr3+ and O2− in the bulk alloy. The formation mechanism of each oxide layer is discussed.

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Improving oxidation resistance of wire arc additive manufactured Inconel 625 Ni-based superalloy by pack aluminizing

Cited by 41 publications

References 51 publications

Effects of aluminised-coating on microstructure and properties of Ni–Co-base superalloys

Effects of aluminised-coating on microstructure and properties of Ni–Co-base superalloys

Sintering parameter optimization by inverse analysis in direct metal deposition of Inconel 718

High‐Temperature Oxidation Behavior of Hastelloy N Alloy for Molten Salt Reactor at 650–980 °C

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