Anti-aging treatment of nuclear power plant steel

Zhao, Yanhua; He, Binyan; Saillet, Sébastien; Domain, Christophe; Delliou, Patrick Le; Perez, Michel; Qin, Rongshan

doi:10.1016/j.msea.2018.08.023

Cited by 16 publications

(4 citation statements)

References 45 publications

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“…The kinetic effect of an electric current was initially identified in the material's electroplasticity [12], was subsequently validated by experimental characterisation [13,14] and then applied to the deformation of brittle alloys such as magnesium alloys [15,16] and aluminium alloys [17] to improve their formability. The electric-current-induced acceleration in the microstructural evolution has also been observed in the precipitate dissolution [18] and the reversal of spinodal decomposition [19,20] in stainless steels. For example, microstructures formed over hundreds of hours without electric current have been observed to be dissolved within minutes by the electric current at the same temperature.…”

Section: Basic Considerationmentioning

confidence: 80%

Critical Assessment of the Electric Effect in Electric Arc Welding

Qin

2021

Metals

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This work provides a critical assessment of electric effects on the microstructure evolution at the heat-affected zone in electric arc welding. Electric effects are the interactions between electromagnetic fields and materials’ microstructures. They differ from the arc effect and the Joule heating effect by providing an alternative contribution to nucleation, grain growth, recrystallisation and tempering. The influence of the electric effect on grain size, defects, anisotropic properties, precipitates and residual stress has been examined kinetically and thermodynamically. The use of adaptable electric current densities, pulse durations, pulse frequencies and electrode movements is suggested to achieve desirable microstructures and mechanical properties for the weldments.

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Section: Basic Considerationmentioning

confidence: 80%

Critical Assessment of the Electric Effect in Electric Arc Welding

Qin

2021

Metals

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“…It is better than lattice Boltzmann method in simulation of adiabatic condition and high Reynolds number fluids but worse than that in simulation of complex geometric boundaries 8,13 . It provides less accuracy than that of the phase field method in simulation of spinodal decomposition by diffusion but can deal with mixing and demixing in convection, in which phase-field method needs to integrate with another hydrodynamic method to achieve the task 10,32 . In comparison with conventional computational fluid dynamics, the method developed in the present work can provide information on microstructure evolution.…”

Section: Discussionmentioning

confidence: 99%

Mesoscale modelling of miscible and immiscible multicomponent fluids

Zhao

Moat

Qin

2019

Sci Rep

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A mesoscopic simulation method based on the integration of dissipative particle dynamics (DPD), smoothed particle hydrodynamics (SPH) and computational thermodynamics (CT) has been developed. The kinetic behaviours of miscible and immiscible fluids were investigated. The interaction force between multicomponent mesoscopic particles is derived from the system free energy. The diffusivity of the components in non-ideal solution is determined by the chemical potential. The proposed method provides convincing predictions to the effects of convection, diffusion and microscopic interaction on the non-equilibrium evolution of engineering fluids, and demonstrates a potential to simulate more complicated phenomena in materials processing.

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“…Numerous researchers have carried out a lot of electropulsing treatment (EPT) experiments in many scientific fields of materials, including recovery and recrystallization [ 13 , 14 , 15 , 16 ], phase transformation [ 17 , 18 , 19 , 20 ], and precipitates regulation [ 21 , 22 , 23 , 24 ]. Zhao et al [ 25 ] and Liu et al [ 26 ] used electropulsing to regenerate the microstructures of thermally aged duplex stainless steels and successfully reversed the performance degradation. The prospect of the rapid regeneration of the microstructures and service performance of degraded materials through electropulsing is very attractive.…”

Section: Introductionmentioning

confidence: 99%

Study on the Re-Aging Behavior of Cu-Rich Precipitates in a FeCu Alloy under Electropulsing

Xia,

Yang,

Gao

et al. 2024

Materials

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The nanoscale Cu-rich precipitates (CRPs) are one of the most critical microstructural features responsible for degrading the mechanical properties of reactor pressure vessel (RPV) steels. The prospect of the rapid regeneration of the service performance of degraded materials through electropulsing is attractive, and electropulsing has been proven to have the application potential to eliminate the CRPs and recover the mechanical properties of RPV materials. However, few studies have investigated the secondary service issue of electropulsing. This paper provides experimental findings from microstructural investigations and property evaluations of a FeCu RPV model alloy subjected to re-aging following recovery electropulsing and annealing treatments. The evolution behavior of CRPs and the changes in the hardness of the alloy during the re-aging process after electropulsing treatment were consistent with the initial aging process, while the re-aging process of the annealing treatment group was quite different from the initial aging. The difference between the electropulsing and annealing treatment groups was that the annealing treatment failed to eliminate the precipitates completely, leaving behind some large precipitates. This work demonstrates the potential application of EPT in this field.

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Anti-aging treatment of nuclear power plant steel

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Cited by 16 publications

References 45 publications

Critical Assessment of the Electric Effect in Electric Arc Welding

Critical Assessment of the Electric Effect in Electric Arc Welding

Mesoscale modelling of miscible and immiscible multicomponent fluids

Study on the Re-Aging Behavior of Cu-Rich Precipitates in a FeCu Alloy under Electropulsing

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