Study on high-temperature oxidation kinetics of Haynes 282 and Inconel 718 nickel-based superalloys

Nnaji, Ruth Nkiruka; Bodude, M. A.; Osoba, L.O.; Fayomi, O.S.I.; Ochulor, F. E.

doi:10.1007/s00170-019-04290-0

Cited by 13 publications

(2 citation statements)

References 23 publications

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“…Ultra-Supercritical (A-USC) plants, such as Haynes 282 and Inconel 740H and alloys [1][2][3][4][5]. The former is a γ′ (Ni3(Al,Ti), L12) strengthened wrought superalloy, which achieves an outstanding balance of properties, including oxidation and corrosion resistance along with mechanical properties at elevated temperatures (650 -760 C) [6,7].…”

Section: Considerable Progress Has Been Made In Development Of New Ni...mentioning

confidence: 99%

Microstructural studies of Stellite 6 hardfacing deposited on nickel-based superalloys subjected to long-time aging

Zhang,

Liu,

et al. 2024

Preprint

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Stellite 6 hardfacing is deposited on Haynes 282 and Inconel 740H via plasma transferred arc (PTA) welding. The fabricated hardfacing specimens are subjected to different post-welding heat treatments, then aged at 760 °C, 815 °C and 871 °C for a time length ranging from 1000 to 30000 h. The microstructures of the hardfacings before and after long-time aging are investigated with SEM/EDS/XRD. It is shown that the PTA welding process causes the hardfacing microstructure deviating from Stellite 6 alloy due to dilution. With participation of other elements from the substrate material, the compositions of both solid solution and carbide/intermetallic of the Stellite 6 hardfacing are modified. In the meanwhile, Ti-rich or Ti/Nb-rich new phases are generated. Long-time aging has an impact on the microstructures of the hardfacings, but at 760 ℃, in particular, for an exposure time less than 20000 h, the microstructures of the hardfacings do not show obvious change. However, when the hardfacing specimens are aged at 815 ℃ and 871 ℃ even for an exposure time of 1000 h only, Al-rich precipitates can occur and the amount of the precipitates increase with aging time. These brittle precipitates generally have a detrimental effect on the performance of the hardfacings, because they can deteriorate the ductility of the hardfacings. With the presence of Al-rich precipitates the hardness of the hardfacings decreases.

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Section: Considerable Progress Has Been Made In Development Of New Ni...mentioning

confidence: 99%

Microstructural studies of Stellite 6 hardfacing deposited on nickel-based superalloys subjected to long-time aging

Zhang,

Liu,

et al. 2024

Preprint

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“…For these reasons, superalloys are often used in hot parts of jet turbine engines, such as blades and combustion chambers, rocket engines, power plant turbines, heat treatment equipment, and chemical and petrochemical units. The metallurgical properties and microstructure, and chemical composition of these alloys affect their creep behavior [1,2]. The grinding of this material is always tricky due to its high strength and thermal resistance.…”

Section: Introductionmentioning

confidence: 99%

An Experimental Investigation of the Effects of Dressing and Grinding Parameters on Sustainable Grinding of Inconel 738 Used for Automated Manufacturing

Hadad,

Attarsharghi,

Makarian

et al. 2023

Processes

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The significant effect of the dressing process on the surface of the grinding wheel (GW) and the need to provide an optimal dressing condition are the requirements of reduction machining time and energy consumption in the sustainable grinding process. In this study, for the first time, the results of changes in the parameters of the dressing process and changes in the topography of the grinding surface on the surface roughness of the Inconel 738 have been presented using single-edge and four-edge diamond dressers. The use of minimum quantity lubrication (MQL) and wet condition are other variables in this study to reduce the consumption of cutting fluid and prevent its destructive effects on the environment. The results indicate that the MQL technique increases the grinding performance of Inconel 738 by reducing ground workpiece surface roughness and decreasing the coolant–lubricant consumption comparing to the conventional wet grinding process. Additionally, it has been found from the experimental results that applying a single-edge dresser generates finer topography on the grinding wheel and, consequently, has a better surface finish in the grinding process compared to the multipoint diamond dressing tool with the same dressing and grinding parameters. In other words, increasing the dressing feed rate during dressing of the grinding wheel using a multipoint dresser makes a finer wheel surface topography and as a result decreases the surface roughness of the ground workpiece compared to a single-edge dresser. With multipoint diamond tools, the grinding performance during the life of the dressing tool also tends to remain more consistent, which is a definite advantage in automated production. Therefore, application of a multipoint dresser leads to a reduction in dressing time and increased production capability.

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Corrosion Behavior of Alloys in Supercritical Water Oxidation Processes

Xu¹,

Guo²

2021

Corrosion Characteristics, Mechanisms and Control Methods of Candidate Alloys in Sub- And Supercritical Water

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Study on high-temperature oxidation kinetics of Haynes 282 and Inconel 718 nickel-based superalloys

Cited by 13 publications

References 23 publications

Microstructural studies of Stellite 6 hardfacing deposited on nickel-based superalloys subjected to long-time aging

Microstructural studies of Stellite 6 hardfacing deposited on nickel-based superalloys subjected to long-time aging

An Experimental Investigation of the Effects of Dressing and Grinding Parameters on Sustainable Grinding of Inconel 738 Used for Automated Manufacturing

Corrosion Behavior of Alloys in Supercritical Water Oxidation Processes

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