High-temperature oxidation of advanced FeCrNi alloy in steam environments

Elbakhshwan, Mohamed; Gill, Simerjeet K.; Rumaiz, Abdul K.; Bai, Jianming; Ghose, Sanjit; Rebak, Raúl B.; Ecker, Lynne

doi:10.1016/j.apsusc.2017.06.318

Cited by 24 publications

(6 citation statements)

References 38 publications

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“…Ni-based alloy has been used in high temperature application such as heat-treating industries, power plant, nuclear reactor and chemical industries. The research on the high temperature oxidation on various type of Ni-based alloy has been extensively study by various researchers [1][2][3][4]. Isothermal oxidation test is an approach to investigate the oxide growth rate of the metals during exposure at high temperature.…”

Section: Introductionmentioning

confidence: 99%

Isothermal Oxidation Behaviour of 800H Nickel-Based Alloy

Parimin

Hamzah

Ahad

et al. 2022

J. Phys.: Conf. Ser.

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The behaviour of 800H nickel (Ni)-based alloy under isothermal oxidation condition was study in this paper. The isothermal oxidation behaviour was examined in terms of fine grained and coarse grained 800H Ni-based alloy obtained from heat treatment operation at 1000 °C and 1150 °C, respectively. The heat treated samples were undergo an isothermal oxidation attempt at 500 °C in laboratory air for 500 hours exposure duration. The effects on the oxidation kinetics was examined in terms of weight change measurement. In addition, the effects on the oxide scale growth was observed in terms of phase analysis using XRD technique and surface morphology analysis using FESEM outfitted with EDX spectrometer. As a results, both fine grained and coarse grained 800H Ni-based alloy were obey a parabolic rate law showing that the oxide growth rate was followed a diffusion controlled mechanism. Additionally, fine grained 800H Ni-based alloy sample exhibited a inferior oxidation rate compared to coarse grained sample. The XRD analysis exhibited that the oxides scale composed of Cr2O3, TiO2 and MnCr2O4. The observation on the oxide scale morphology indicate that uniform oxide scales were formed on the alloy surface of both samples. However, coarse grained 800H Ni-based alloy recorded an oxide exfoliation which indicate poor oxidation protection.

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Section: Introductionmentioning

confidence: 99%

Isothermal Oxidation Behaviour of 800H Nickel-Based Alloy

Parimin

Hamzah

Ahad

et al. 2022

J. Phys.: Conf. Ser.

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“…At a temperature of 800 °C, the oxidation rates of Ni-5Cr, Ni-10Cr, and Ni-15Cr alloys continued to increase, while those of alloys with 20 wt.% Cr and above reduced due to protective external chromia scale formation. The oxidation resistance in the conditions of steam environments was studied in [ 8 ] for FeCrNi alloy where it was observed that the temperature increase from 800 to 1000 °C led to an increase in the oxidized surface and increased nickel diffusion. To further increase the properties of layers based on Ni-Cr alloys, doping with various compounds and elements can be used.…”

Section: Introductionmentioning

confidence: 99%

Microstructure of Rhenium Doped Ni-Cr Deposits Produced by Laser Cladding

et al. 2021

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The addition of Rhenium up to 6% to Ni-Cr alloys can dramatically improve the corrosion and oxide resistance of deposited coatings at high operating temperatures. Ni-Cr+Re layers can be successfully produced using conventional powder metallurgy, high rate solidification (HRS), or magnetron sputtering methods. However, in industrial applications, high-performance deposition methods are needed, e.g., laser cladding. Laser cladding has several advantages, e.g., metallurgical bonding, narrow heat-affected zone (HAZ), low dilution, and slight thermal damage to the substrate. In this paper, a powder Ni-Cr composite with 1% (wt.) of Rhenium was produced, then deposited onto a steel substrate (16Mo3) by laser cladding to assess the micro and macrostructural properties of the obtained layers. Besides the macro and microscopic observations, scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) microanalysis of the deposit and HAZ as well as microhardness measurements have been conducted. The microstructure observations revealed four subareas of HAZ gradually changing from the fusion line towards the base material. Maximum hardness occurred in the HAZ, mainly in areas closer to the clad/substrate interface, reaching up to 350–400 HV. No sudden changes in the composition of the deposit and the area of fusion line were observed.

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“…Fe-Ni-Cr alloys are heat-resistant alloys, which are developed for high-temperature oxidizing environments. The Fe-Ni-Cr alloys form a protective surface film of Cr2O3, which have excellent oxidation resistance in many severe environments [1][2][3]. In heat-resistant related applications, the components are often subjected to the repeated thermal cyclic, which results a temperature gradient on heating and cooling.…”

Section: Introductionmentioning

confidence: 99%

Oxidation Kinetics of Fe-Ni-Cr Alloy at 900 °C

Parimin

Hamzah

2020

MSF

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The study of isothermal oxidation of Fe-Ni-Cr alloy was done at 900 °C for 500 hours. The effect of oxidation kinetics and oxide growth behavior on Fe-Ni-Cr alloy were investigated on heat-treated Fe-Ni-Cr alloy to understand the oxidation mechanism on different grain size of alloy. The grain size of Fe-Ni-Cr alloy was varying through heat treatment process at three different temperatures, namely 1000 °C, 1100 °C and 1200 °C for 3 hours soaking time followed by water quench. The heat-treated Fe-Ni-Cr alloy was experienced discontinuous isothermal oxidation test at 900 °C up to 500 hours exposure. The oxidation kinetics plot was calculated based on the weight change per surface area over time. The oxide surface morphology was characterized by using scanning electron microscope (SEM) equipped with energy dispersive x-ray (EDX) spectrometer. The heat treatment process recorded an increasing grain size alloy as the heat treatment temperature increase. 8H10 sample indicate the fine grain size, whereas 8H12 sample indicate the coarse grain size. The oxidation kinetics of all samples exhibit the weight gain pattern with fine grain 8H10 sample recorded the lowest weight gain compared to 8H11 and 8H12 samples. All samples were obeyed parabolic rate law indicating the oxide growth rate followed a diffusion-controlled mechanism. The oxide surface morphology of 8H10 sample displayed a continuous oxide scales with formation of grain boundary oxide along the grain boundary area. Similar oxide structure formed on 8H11 and 8H12 samples, except for the formation of crack on the grain boundary oxide on both samples. In addition, 8H12 sample also formed a porous oxide structure.

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High-temperature oxidation of advanced FeCrNi alloy in steam environments

Cited by 24 publications

References 38 publications

Isothermal Oxidation Behaviour of 800H Nickel-Based Alloy

Isothermal Oxidation Behaviour of 800H Nickel-Based Alloy

Microstructure of Rhenium Doped Ni-Cr Deposits Produced by Laser Cladding

Oxidation Kinetics of Fe-Ni-Cr Alloy at 900 °C

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