Effect of refractory elements and Al on the high temperature oxidation of Ni-base superalloys and modelling of their oxidation resistance

Yun, Dae Won; Seo, Seong Moon; Jeong, Hwan Jeong; Yoo, Yong Shim

doi:10.1016/j.jallcom.2017.03.179

Cited by 34 publications

(4 citation statements)

References 33 publications

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“…Mo-alloy has a high potential for the oxidation at 700 K and consequently enhanced the oxidation resistance. Similar observations have been reported about the positive effect of Cr and Al content in Ni-Co -Cr -Al -W -Mo -Ta -Re -Ru during the oxidation at 1100 • C and to the formation of a protective layer as NiAl2O4 [9]. In other researches, it has been shown that W and Mo cause volatile species as oxide phase to form and prevent the formation of fresh protective Cr2O3 layer after the spallation of oxide scale, and consequently there is not any linear relation between the amount of alloying elements and the oxidation behavior in the multicomponent system [1].…”

Section: Introductionsupporting

confidence: 88%

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Modified Particle Swarm Optimization-Artificial Neural Network and Gene Expression Programing for Predicting High Temperature Oxidation Behavior of Ni–Cr–W-Mo Alloys

Hasibi

Mahmoudian

Khayati

2020

IJE

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This paper is an attempt to model the oxidation behavior of Ni-base alloys by considering the alloying elements, i.e., Cr, W, Mo, as variables. Modified particle swarm optimization-artificial neural network (MPSO-ANN) and gene expression programming (GEP) techniques were employed for modeling. Data set for construction of (MPSO-ANN) and GEP models selected from 66 cyclic oxidation performed in the temperature range of 400-1150 ᵒC for 27 different Ni-based alloy samples at various amounts of Cr, W, and Mo. The weight percent of alloying elements selected as input variables and the changes of weight during the oxidation cycle considered as output. To analyze the performance of proposed models, various statistical indices, viz. root mean squared error (RMSE) and the correlation coefficient between two data sets (R 2) were utilized. The collected data of GEP randomly divided into 21 training sets and 6 testing sets. The results confirmed that the possibility of oxidation behavior modeling using GEP by R 2 = 0.981, RMSE =0.0822. By consideration of oxidation resistance as criteria, Cr, Mo, and W enhanced the oxidation resistance of Ni-based alloys. The results showed that in the presence of Cr as alloying element, especially at Cr contents higher than 22 wt.%, the effect of W and Mo were negligible. However, the same trend was reversed at the sample with Cr content lower than 20 wt.%. In these cases, the effect of W and Mo on oxidation resistance were significantly enhanced.

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Section: Introductionsupporting

confidence: 88%

“…While the oxidation resistance of Fe and Ni-base alloys are affected by W and Mo in various mechanisms. Typically, the presence of a higher contents of refractory metals, e.g., Mo, W, Ta, Re, is necessary for higher creep strength of Ni-based alloys [5,9].…”

Section: Introductionmentioning

confidence: 99%

Modified Particle Swarm Optimization-Artificial Neural Network and Gene Expression Programing for Predicting High Temperature Oxidation Behavior of Ni–Cr–W-Mo Alloys

Hasibi

Mahmoudian

Khayati

2020

IJE

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“…Cobalt oxide (Co 3 O 4 ) is susceptible to spall during isothermal high-temperature exposure due to its high defect concentration and porous structure [28]. MoO 3 is a volatile oxide, which melts at 795 °C and break down beyond 1100 °C [11,12,29]. The presence of these spinels, especially with the addition of Ta and Mo, may be responsible for initial rapid mass gain.…”

Section: Xrd Analysis Of the Oxidized Nickel-based Alloysmentioning

confidence: 99%

Effect of Nanocrystalline Nickel Powder and Co, Mo, Ta, and Al Additions on Isothermal Oxidation Behavior of Ni–17Cr Alloy

Babalola

Shongwe

Maledi

et al. 2020

Metallogr. Microstruct. Anal.

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In this paper, the effect of nanocrystalline nickel powder developed via high-energy ball milling process and the addition of Co, Mo, Ta, and Al on the isothermal oxidation behavior of Ni-17Cr binary alloy developed by spark plasma sintering system was investigated. The oxidation behavior of the sintered alloys was studied in air at 1100 °C for exposure period up to 312 h. The oxidation rate and kinetics show that the addition of Al and nanocrystalline nickel enhances the oxidation resistance of the binary alloy followed by Mo, Co, and Ta in their reducing order. The formation of the chromia scale was common to all the sintered alloys investigated as confirmed by X-ray diffraction, scanning electron microscopy, and energydispersive X-ray spectroscopy analysis.

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“…Currently, the major determinant of oxidation behavior is the composition of various elements, including Al, Ta, Si, Hf, and Re [ 15 , 16 ]. Numerous studies have investigated the oxidation behavior of Ni-based superalloys [ 17 ], including their oxidation kinetics and the oxide layer microstructure [ 18 , 19 ]. Owing to the feasibility of the experiment, the oxidation kinetics are widely described in terms of changes in mass [ 20 ].…”

Section: Introductionmentioning

confidence: 99%

Investigations on Oxidation Behavior of Free-Standing CoNiCrAlYHf Coating with Different Surface Roughness at 1050 °C

et al. 2023

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MCrAlYHf bond coats are employed in jet and aircraft engines, stationary gas turbines, and power plants, which require strong resistance to oxidation at high temperatures. This study investigated the oxidation behavior of a free-standing CoNiCrAlYHf coating with varying surface roughness. The surface roughness was analyzed using a contact profilometer and SEM. Oxidation tests were conducted in an air furnace at 1050 °C to examine the oxidation kinetics. X-ray diffraction, focused ion beam, scanning electron microscopy, and scanning transmission electron microscopy were employed to characterize the surface oxides. The results show that the sample with Ra = 0.130 µm demonstrates better oxidation resistance compared to Ra = 7.572 µm and other surfaces with higher roughness in this study. Reducing surface roughness led to a decrease in the thickness of oxide scales, while the smoothest surface exhibited increased growth of internal HfO2. The β-phase on the surface with Ra = 130 µm demonstrated faster growth of Al2O3 compared to the γ-phase. An empirical model was suggested to explain the impact of surface roughness on oxidation behavior based on the correlation between the surface roughness level and oxidation rates.

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Effect of refractory elements and Al on the high temperature oxidation of Ni-base superalloys and modelling of their oxidation resistance

Cited by 34 publications

References 33 publications

Modified Particle Swarm Optimization-Artificial Neural Network and Gene Expression Programing for Predicting High Temperature Oxidation Behavior of Ni–Cr–W-Mo Alloys

Modified Particle Swarm Optimization-Artificial Neural Network and Gene Expression Programing for Predicting High Temperature Oxidation Behavior of Ni–Cr–W-Mo Alloys

Effect of Nanocrystalline Nickel Powder and Co, Mo, Ta, and Al Additions on Isothermal Oxidation Behavior of Ni–17Cr Alloy

Investigations on Oxidation Behavior of Free-Standing CoNiCrAlYHf Coating with Different Surface Roughness at 1050 °C

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