Creep-fatigue interactions in type 316H under typical high-temperature power plant operating conditions

Petkov, Markian P.; Chevalier, Marc; Dean, David; Cocks, A.C.F.

doi:10.1016/j.ijpvp.2021.104500

Cited by 4 publications

(3 citation statements)

References 32 publications

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“…For instance, FRABs have been applied to building and shown excellent characteristics, including very low thermal conductivity, a light weight, very good sound isolation, and excellent waterproof performance [14][15][16]. Furthermore, FRABs also have great application prospects in high-temperature environments, such as steam pipes in power plants [17,18] and petrochemical plants [19]. The typical operation temperature is usually between 200 • C and 600 • C. By using FRABs instead of traditional insulation materials (basalt fiber and glass fiber), it is expected that a significant amount of energy can be saved [20].…”

Section: Introductionmentioning

confidence: 99%

The Evolution of Insulation Performance of Fiber-Reinforced Silica Aerogel after High-Temperature Treatment

et al. 2023

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Fiber-reinforced silica aerogel blankets (FRABs) are an important high-temperature thermal insulation material for industry applications that have emerged in recent years. In order to better understand the performance evolution of FRABs at high temperatures, the effect of heat treatment at different temperatures on the performance of FRABs as well as their base material, hydrophobic silica aerogel powder and glass wool, was investigated. The property evolution of the hydrophobic silica aerogel powder showed two stages with an increase in thermal treatment temperatures. The skeleton structure of the aerogel remained unchanged, but the residual organic chemicals, such as hydrophobic groups, were decomposed when the heat treatment temperature was lower than 400 °C. Above 400 °C, the skeleton began to shrink with the increase in temperature, which led to an increase in thermal conductivity. The structure and room-temperature thermal conductivity of the glass wool blanket were less affected by a heat treatment temperature under 600 °C. Therefore, the performance degradation of FRABs at high temperatures is mainly due to the change in the aerogel powder. The insulation performance of the glass wool and FRAB at high temperatures was studied using a heating table which was designed to simulate working conditions. The energy savings of using FRABs instead of glass fiber were calculated and are discussed here.

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Section: Introductionmentioning

confidence: 99%

The Evolution of Insulation Performance of Fiber-Reinforced Silica Aerogel after High-Temperature Treatment

et al. 2023

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“…Many engineering components serving in the power‐generating industries (oil‐fired, coal‐fired, and nuclear power plants) constantly withstand severe cyclic mechanical loads and environmental attacks throughout their whole life cycle 1 . With the increases of steam working pressure and temperature in the ultra‐supercritical unit, the adverse effects of fatigue, creep, and environmental attacks (i.e., environmental corrosion and high‐temperature oxidation) due to frequent starting‐ups/shutting‐downs and inherent stress relaxation in steady operations at high temperatures become important.…”

Section: Introductionmentioning

confidence: 99%

“…Many engineering components serving in the powergenerating industries (oil-fired, coal-fired, and nuclear power plants) constantly withstand severe cyclic mechanical loads and environmental attacks throughout their whole life cycle. 1 With the increases of steam working pressure and temperature in the ultra-supercritical unit, the adverse effects of fatigue, creep, and environmental attacks (i.e., environmental corrosion and hightemperature oxidation) due to frequent starting-ups/shutting-downs and inherent stress relaxation in steady Abbreviations: AIC, Akaike information criterion; BIC, Bayesian information criterion; cp, tensile creep strain reversed by compressive plastic strain; DE, ductility exhaustion; EPMA, electron probe micro analysis; FM, frequency modified; FM-DF, frequency modified damage function; HTLCF, high temperature low cycle fatigue; LDS, linear damage summation; MAE, mean absolute error; NSE, Nash-Sutcliffe efficiency; pc, tensile plastic strain reversed by compressive creep strain; pp, tensile plastic strain reversed by compressive plastic strain; RMSE, root-mean-square error; RT, room temperature; SD, standard deviation; SEM, scanning electron microscope; SEP, strain energy range partitioning; SRP, strain range partitioning; TF, time fraction; T-SEDE, strain energy ductility exhaustion model modified by Takahashi et operations at high temperatures become important. The majority of time-related creep and oxidation damage, cycle-related fatigue damage, and the interactions of these mechanisms may be the primary reasons for the premature failure of the structural materials used in high-temperature components.…”

Section: Introductionmentioning

confidence: 99%

High‐temperature creep‐fatigue‐oxidation behaviors of P92 steel: Evaluation of life prediction models

Wang

Wen

Xia

et al. 2022

Fatigue Fract Eng Mat Struct

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Damages caused by the effects of cyclic loading (fatigue) and high temperature (creep and oxidation) have been considered critical and need to be appropriately evaluated. A series of strain‐controlled fatigue and creep‐fatigue tests are performed on P92 at 873 K under oxygen‐containing environment. The creep‐fatigue life prediction results are summarized using models based on strain‐range partition, Manson–Coffin equation and linear damage summation (LDS) rule. Obviously, the models based on the LDS rule show relatively good performance with an error band of ±2.5. In view of the adverse effects of oxidation on creep‐fatigue endurance, this paper further develops a physically‐based oxidation damage equation, which is incorporated into LDS rule for the improvement of life assessment. The predicted and experimental results falling into ±1.5 error band proved the accuracy of the proposed oxidation damage equation in the LDS rule. Additionally, model selection criteria are recommended to evaluate the model prediction capabilities.

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Continuum Damage Mechanics Modeling of High-Temperature Flaw Propagation: Application to Creep Crack Growth in 316H Standardized Specimens and Nuclear Reactor Components

Recuero

Petkov

Spencer

et al. 2023

Journal of Pressure Vessel Technology

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Predicting creep crack growth (CCG) of flaws found during operation in high-temperature alloy components is essential for assessing the remaining lifetime of those components. While defect assessment procedures are available for this purpose in design codes, these are limited in their range of applicability. This study assesses the application of a local damage-based finite-element methodology as a more general technique for the prediction of CCG at high temperatures on a variety of structural configurations. Numerical results for stainless steel 316H, which are validated against experimental data, show the promise of this approach. This integration of continuum damage mechanics (CDM) based methodologies, together with adequate inelastic models, into assessment procedures can therefore inform the characterization of CCG under complex operating conditions, while avoiding excessive conservatism. This article shows that such modeling frameworks can be calibrated to experimental data and used to demonstrate that the degree of tri-axiality ahead of a growing creep crack affects its rate of growth. The framework is also successfully employed in characterizing CCG in a realistic reactor pressure vessel geometry under an arbitrary loading condition. These results are particularly relevant to the nuclear power industry for defect assessment and inspections as part of codified practices of structural components with flaws in high-temperature reactors.

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Creep-fatigue interactions in type 316H under typical high-temperature power plant operating conditions

Cited by 4 publications

References 32 publications

The Evolution of Insulation Performance of Fiber-Reinforced Silica Aerogel after High-Temperature Treatment

The Evolution of Insulation Performance of Fiber-Reinforced Silica Aerogel after High-Temperature Treatment

High‐temperature creep‐fatigue‐oxidation behaviors of P92 steel: Evaluation of life prediction models

Continuum Damage Mechanics Modeling of High-Temperature Flaw Propagation: Application to Creep Crack Growth in 316H Standardized Specimens and Nuclear Reactor Components

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