High temperature cyclic oxidation of Ni based superalloys at different temperatures in air

Сабер, Д.; Emam, Islam S.; Abdel-Karim, R.

doi:10.1016/j.jallcom.2017.05.130

Cited by 77 publications

(27 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The outward diffusion rate of the elements could not keep up with the spalling speed of the oxide scale, resulting in a decrease of the oxide scale thickness. Additionally, the inward diffusion of oxygen is increased by defects, and a large number of internal oxides are more and more serious under the outer scale [43,44]. The structure and composition of the outer layer of oxides scale changed significantly throughout the whole corrosion process.…”

Section: Discussionmentioning

confidence: 99%

Corrosion Behavior of GH4169 Alloy under Alternating Oxidation at 900 °C and Solution Immersion

Liu

et al. 2019

Materials

View full text Add to dashboard Cite

In this paper, the corrosion behavior of GH4169 superalloy under alternating oxidation (at 900 °C) and solution immersion (in 3.5% NaCl solution, 30 ± 1 °C) has been studied by SEM, XRD, XPS, and electron probe microanalysis (EPMA). The results show that the alternating environment increases the corrosion rate of GH4169. The reaction of NaCl and Cr2O3 generates various volatile and soluble corrosion products, such as Na2Cr2O7, CrCl3, Cl2, and Na2CrO4, at a high temperature. The destruction of the protective Cr2O3 film leads to the increase of defects in the oxide scale, promoting the formation of oxides, such as NiO and Fe2O3, and changes the composition and structure of the oxide film. After repeated iterations, the mixed oxides will result in the spalling of the oxide film because they can reduce the fracture toughness of the corrosion scale. Therefore, the corrosion is comprehensively intensified.

show abstract

Section: Discussionmentioning

confidence: 99%

Corrosion Behavior of GH4169 Alloy under Alternating Oxidation at 900 °C and Solution Immersion

Liu

et al. 2019

Materials

View full text Add to dashboard Cite

show abstract

“…Hal ini menandakan penurunan permukaan yang bersifat resisten terhadap oksidasi. Sehingga mengakibatkan berkurangnya difusi oksigen kedalam sampel yang dipengaruhi oleh lamanya waktu oksidasi serta temperatur yang berfungsi mempercepat difusi oksigen logam (Saber dkk., 2017) [7].…”

Section: Hasil Dan Pembahasanunclassified

Pengaruh Penambahan (MoO3-SiO2) pada Coating AlNiCrCu yang difabrikasikan dengan Metode Paduan Mekanik

hariyati¹

2020

J. Fis. Indones.

View full text Add to dashboard Cite

Telah dilakukan penelitian tentang sintesa lapisan komposit AlN iCrCu-(M oO 3 −SiO 2 ) pada pelat baja karbon rendah. Material coating AlN iCrCu-(M oO 3 − SiO 2 ) dicampur dan dimiling untuk menjadi serbuk halus dengan menggunakan metode paduan mechanical alloying (MA). Hasil penampang lintang (cross-section) dapat memperlihatkan bahwa coating AlN iCrCu-(M oO 3 −SiO 2 ) telah berhasil terdeposisi dengan baik pada substrat baja karbon rendah dengan menggunakan metode paduan mechanical alloying (MA) dan memiliki nilai rata-rata ketebalan lapisan permukaan sebesar 38, 162µm−52, 662µm. Hasil analisa surface morfology permukaan dengan penambahan (M oO 3 − SiO 2 ) pada penambahan konsentrasi (M oO 3 − SiO 2 ) sebesar 42% memiliki paduan morfologi yang paling baik daripada sampel yang lain karena memiliki poros yang lebih sedikit. Hasil uji oksidasi cyclic pada suhu 800 o C selama 10 siklus selama 200 jam (perhari 20 jam) dengan menggunakan muffle furnace menunjukkan bahwa semakin meningkat pertambahan massa maka difusi oksigen yang masuk pada permukaan semakin cepat. Kata Kunci : baja karbon rendah, pelapis, mechanicalalloying (MA), oksidasi siklik. AbstractResearch on the synthesis of AlN iCrCu-(M oO 3 − SiO 2 ) composite layers on low carbon steel plates has been carried out. AlN iCrCu-(M oO 3 −SiO 2 ) coating material is mixed and milled to become a fine powder using the mechanical alloying (MA) alloy method. Cross-section results can show that the AlN iCrCu-(M oO 3 − SiO 2 ) coating has successfully deposited well on low carbon steel substrates using the mechanical alloying (MA) alloying method and has an average surface layer thickness of 38.162µm − 52, 662µm. The results of surface morphology analysis with the addition (M oO 3 − SiO 2 ) at the addition of concentration (M oO 3 − SiO 2 ) of 42% have the best morphological alloys than the other samples because they have fewer shafts. The results of the cyclic oxidation test at 800 o C for 10 cycles for 200 hours (20 hours per day) using muffle furnace showed that the more mass increases the oxygen diffusion that enters the surface is faster.

show abstract

“…The lower k p value leads to the higher oxidation resistance and vice versa. The K p values are compared with K p for Inconel 617 [12,13] which clearly show that Hastelloy X shows oxidation resistance with lower kp value than that of Inconel 617.…”

Section: Thermogravimetric Analysismentioning

confidence: 99%

Effect of Thermal Cycling on Oxidation of Nickel Based Superalloys in Presence of Aggressive Ions

El-Awadi

Abdel‐Samad

Elshazly³

2020

Arab Journal of Nuclear Sciences and Applications

View full text Add to dashboard Cite

Superalloys are considered potential candidates to be used in high temperature applications. In the present study, experimental measurements of high temperature oxidation in presence of aggressive ions of Nickel base superalloy (Hastelloy-X) have been carried out at 700°C, 800°C and 900°C for exposure time durations of 1, 3, 5, 10, 20, 50 and 100 hours. The oxidation behavior of superalloy Hastelloy X in the presence of aggressive media, normally, NaCl and Na 2 SO 4 is to identify the surface scales that have been formed. After oxidation experiments, the samples were characterized using Scanning Electron Microscope (SEM) and X-ray diffraction (XRD) to find out the formed phases. The results showed that the major corrosion products formed are Nickel Chromites NiCr 2 O 4 with some Chromium Cobalt Oxide CoCr 2 O 4 spinels in additions to chromium oxide Cr 2 O 3. The obtained results of Hastelloy X were compared with the results achieved previously for Inconel 617. In this study, the activation energy of Hastelloy X was estimated and found to be Ea = 57.84 KJ/mole.

show abstract

High temperature cyclic oxidation of Ni based superalloys at different temperatures in air

Cited by 77 publications

References 29 publications

Corrosion Behavior of GH4169 Alloy under Alternating Oxidation at 900 °C and Solution Immersion

Corrosion Behavior of GH4169 Alloy under Alternating Oxidation at 900 °C and Solution Immersion

Pengaruh Penambahan (MoO3-SiO2) pada Coating AlNiCrCu yang difabrikasikan dengan Metode Paduan Mekanik

Effect of Thermal Cycling on Oxidation of Nickel Based Superalloys in Presence of Aggressive Ions

Contact Info

Product

Resources

About