Study of the scale formed on super 304H boiler tube steels after long-term steam oxidation at high temperatures

Yoo, Keun Bong; He, Yinsheng; Lee, Han-sang; Bae, So Young; Kim, Doo-Soo; Shin, Keesam

doi:10.1016/j.matchar.2018.09.045

Cited by 14 publications

(4 citation statements)

References 24 publications

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“…Presence of glassy SiO 2 in oxide scale of austenitic steel was found by Rutkowski et al [24] and later confirmed on other steel grades by Yoo et al [25]. These oxide scales grown under fireside corrosion conditions were more complex, with glassy SiO 2 phase in coexistence with few sublayers of other oxides.…”

Section: After Oxidationmentioning

confidence: 65%

Microstructural Characterisation of Austenitic Heat Resistant Sanicro 25 Steel after Steam Oxidation

Rutkowski

2020

Materials

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Microstructural and morphological observations of the surface scale on a high Cr and Ni austenitic heat resistant steel oxidised in water vapour at 700 °C are reported. Analysis of microstructure was carried out by analytical techniques of transmission- and scanning electron microscopy. Investigation of M23C6 nucleated at the interface between matrix and the Z-phase precipitates after exposing to high temperature showed semicoherency between M23C6 and the matrix and no coherency with the Z-phase. Plates developed on the oxide scale surface consist of Cr2O3 crystals separated by amorphous SiO2.

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Section: After Oxidationmentioning

confidence: 65%

Microstructural Characterisation of Austenitic Heat Resistant Sanicro 25 Steel after Steam Oxidation

Rutkowski

2020

Materials

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“…For USC boiler tubes, the selection of materials must ensure two critical properties: creep rupture strength and resistance to steam oxidation [1][2][3]. For instance, it has been reported that low-alloy steels, previously used in the water-cooled wall tubes of SC coalfired power plants, lack the necessary creep strength for USC applications [4,5]. Hence, significant research efforts have been dedicated to understanding creep and oxidation mechanisms and developing suitable materials [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Energy-Based Unified Models for Predicting the Fatigue Life Behaviors of Austenitic Steels and Welded Joints in Ultra-Supercritical Power Plants

Hwang,

Kim,

Lim

et al. 2024

Materials

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The development of a cost-effective and accurate model for predicting the fatigue life of materials is essential for designing thermal power plants and assessing their structural reliability under operational conditions. This paper reports a novel energy-based approach for developing unified models that predict the fatigue life of boiler tube materials in ultra-supercritical (USC) power plants. The proposed method combines the Masing behavior with a cyclic stress–strain relationship and existing stress-based or strain-based fatigue life prediction models. Notably, the developed models conform to the structure of the modified Morrow model, which incorporates material toughness (a temperature compensation parameter) into the Morrow model to account for the effects of temperature. A significant advantage of this approach is that it eliminates the need for tensile tests, which are otherwise essential for assessing material toughness in the modified Morrow model. Instead, all material constants in our models are derived solely from fatigue test results. We validate our models using fatigue data from three promising USC boiler tube materials—Super304H, TP310HCbN, and TP347H—and their welded joints at operating temperatures of 500, 600, and 700 °C. The results demonstrate that approximately 91% of the fatigue data for all six materials fall within a 2.5× scatter band of the model’s predictions, indicating a high level of accuracy and broad applicability across various USC boiler tube materials and their welded joints, which is equivalent to the performance of the modified Morrow model.

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“…[18][19][20] Therefore, understanding the mechanism of oxide scale effects on the water wall membrane is of great significance to eliminate the adverse influences and improve the efficiency of power plant. 21 Abundant achievements of boiler water wall were attained on the field about heat transfer and statics performance currently. Zima et al 22 and Dong et al 23 proposed a mathematical model respectively for investigating temperature distribution of supercritical boiler water wall.…”

Section: Introductionmentioning

confidence: 99%

“…Besides, because of high thermal resistance, the hardness deposition of the scale on the inner surface of the water wall not only decreases the heat transfer performance between flame and channel but also intensifies the damage under the influence of statics variation 18–20 . Therefore, understanding the mechanism of oxide scale effects on the water wall membrane is of great significance to eliminate the adverse influences and improve the efficiency of power plant 21 …”

Section: Introductionmentioning

confidence: 99%

A thermal stress analysis of fluid–structure interaction applied to boiler water wall

Zhang

Yang

Nie³

et al. 2020

Asia-Pacific J Chem Eng

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Fluid-structure interaction (FSI), the combination of computational fluid dynamics and computational solid mechanics, is considered as a procedure to determine the stress or strain of the solid under the influence of flow movement. Common parameters such as pressure and temperature that existed in the fluid solver and solid solver are the core factors of date communication in FSI. This work investigated the thermal stress and deformation distribution of the vapor segment of the water wall by numerical simulation under two typical conditions of the 660-MW boiler. The ideal condition and the case with the oxide scale inside were compared to realize the peculiarity of parameter distribution. The results revealed that the peak temperature of water wall was

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Study of the scale formed on super 304H boiler tube steels after long-term steam oxidation at high temperatures

Cited by 14 publications

References 24 publications

Microstructural Characterisation of Austenitic Heat Resistant Sanicro 25 Steel after Steam Oxidation

Microstructural Characterisation of Austenitic Heat Resistant Sanicro 25 Steel after Steam Oxidation

Energy-Based Unified Models for Predicting the Fatigue Life Behaviors of Austenitic Steels and Welded Joints in Ultra-Supercritical Power Plants

A thermal stress analysis of fluid–structure interaction applied to boiler water wall

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