A phase-field modeling of void swelling in the Austenitic stainless steel

Chang, Kunok; Lee, Gyeong-Geun; Kwon, Junhyun

doi:10.1080/10420150.2016.1179304

Cited by 8 publications

(9 citation statements)

References 23 publications

(25 reference statements)

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“…In order to further validate the relation derived in Equation ( 9), we adopted the phase-field model (PFM) of void swelling described by Li [24] and Chang [25]:…”

Section: Discussionmentioning

confidence: 99%

“…The target of our phase-field simulation is to demonstrate the kinetic of void growth under different doses, which is based on phase-field model developed by Li [24] and Chang [25]. Thus, most of our phase-field model parameters follow these previous studies, where simulations are performed at a temperature of 600 K. The parameters used in the simulations are non-dimensional.…”

Section: Discussionmentioning

confidence: 99%

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A Model for Dose Dependence of the Void Swelling in Electron-Irradiated Alloys

Zhao

Wang

et al. 2022

Metals

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Understanding the void swelling dependence on irradiation dose for structural materials is critical for the design and operation of advanced nuclear reactors. Due to their easy accessibility in high-voltage transmission electron microscopes, electron beams have been frequently employed to investigate the void swelling mechanisms. Here, we build a general model to describe the radiation-induced swelling produced by energetic electrons. Based on this model, we develop a quantitative relation between void swelling and irradiation dose, which is in good agreement with experimental data. By extrapolating to high-dose swelling in electron-irradiated alloys, our model validation is consistent with available experiments. Furthermore, the model is well supported by our phase-field simulations.

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“…In order to further validate the relation derived in Equation ( 9), we adopted the phase-field model (PFM) of void swelling described by Li [24] and Chang [25]:…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

A Model for Dose Dependence of the Void Swelling in Electron-Irradiated Alloys

Zhao

Wang

et al. 2022

Metals

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“…6 corresponds to the bulk free energy of the system in the absence of grain boundaries. The model parameters h v , f 2 , f 3 and f 4 are determined by enforcing the following conditions: a void and a region in which the vacancy concentration is in equilibrium are equally stable and their local free energy is equal to zero [16,17]. Voids are defined as structures where the vacancy concentration is equal to 0.999.…”

Section: Free Energymentioning

confidence: 99%

Thermal conductivity of porous polycrystalline PbTe

Troncoso

Chudziński

Todorov

et al. 2021

Phys. Rev. Materials

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PbTe is a leading thermoelectric material at intermediate temperatures, largely thanks to its low lattice thermal conductivity. However, its efficiency is too low to compete with other forms of power generation. This efficiency can be effectively enhanced by designing nanostructures capable of scattering phonons over a wide range of length scales to reduce the lattice thermal conductivity. The presence of grain boundaries can reduce the thermal conductivity to ∼ 0.5 Wm −1 K −1 for small vacancy concentrations and grain sizes. However, grains anneal at finite temperature, and equilibrium and metastable grain size distributions determine the extent of the reduction in thermal conductivity. In the present work, we propose a phase-field model informed by molecular dynamics simulations to study the annealing process in PbTe and how it is affected by the presence of grain boundaries and voids. We find that the thermal conductivity of PbTe is reduced by up to 35% in the porous material at low temperatures. We observe that a phase transition at a finite density of voids governs the kinetics of impeding grain growth by Zener pinning.

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“…The rate theory was used to describe the intra-and inter-granular gas bubble evolution while the FP model described the effect of heterogeneous microstructures and inhomogeneous thermodynamic and kinetic properties on generation and diffusion of fission products. Figure 8 showed the effect of grain morphology on swelling kinetics obtained from this Mechanical properties-void and gas bubble swelling 65,97,98 Thermal properties-thermal transport and melting 55,91,[102][103][104][105][106] Magnetic hardening 107,108 A review: applications of the phase Y Li et al…”

Section: Irradiation Effects On Mechanical Thermal and Magnetic Promentioning

confidence: 99%

“…96 The PF method also has been used to study the effect of microstructures on material property degradation including radiation-induced void and gas bubble swelling. 55,65,91,[97][98][99][100][101][102][103][104][105][106][107][108] Although the PF method has been used to simulate a large number of radiation-induced microstructure evolution phenomena, direct validation of PF models published in the literatures is difficult because most current PF models only addressed one or a couple of multiple microstructures in irradiated materials. Furthermore, there was very limited experimental data for the validation of specific microstructures and processes.…”

Section: Introductionmentioning

confidence: 99%

A review: applications of the phase field method in predicting microstructure and property evolution of irradiated nuclear materials

Sun

et al. 2017

npj Comput Mater

121

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Complex microstructure changes occur in nuclear fuel and structural materials due to the extreme environments of intense irradiation and high temperature. This paper evaluates the role of the phase field method in predicting the microstructure evolution of irradiated nuclear materials and the impact on their mechanical, thermal, and magnetic properties. The paper starts with an overview of the important physical mechanisms of defect evolution and the significant gaps in simulating microstructure evolution in irradiated nuclear materials. Then, the phase field method is introduced as a powerful and predictive tool and its applications to microstructure and property evolution in irradiated nuclear materials are reviewed. The review shows that (1) Phase field models can correctly describe important phenomena such as spatial-dependent generation, migration, and recombination of defects, radiation-induced dissolution, the Soret effect, strong interfacial energy anisotropy, and elastic interaction; (2) The phase field method can qualitatively and quantitatively simulate two-dimensional and three-dimensional microstructure evolution, including radiation-induced segregation, second phase nucleation, void migration, void and gas bubble superlattice formation, interstitial loop evolution, hydrate formation, and grain growth, and (3) The Phase field method correctly predicts the relationships between microstructures and properties. The final section is dedicated to a discussion of the strengths and limitations of the phase field method, as applied to irradiation effects in nuclear materials. npj Computational Materials (2017) 3:16 ; doi:10.1038/s41524-017-0018-y INTRODUCTIONHigh energy particle (such as neutron, ion, and electron) radiation can create major changes in the shape and thermo-mechanical properties of nuclear fuels and structural components of nuclear reactors. These changes are caused by radiation-induced evolution of compositions and microstructures. The main effects of radiation on reactor materials are: (1) dimensional change associated with gas bubble swelling, void swelling, grain growth, and creep; 1-5 (2) loss of ductility and increase in ductile-brittle transition temperature (DBTT) due to the formation of secondphase precipitates, self-interstitial atomic (SIA) loops, and dislocation networks; 6, 7 (3) oxidation and corrosion accelerated by high temperature, fission products, and radiation damage; 8-10 and (4) local and bulk changes in chemical composition, including irradiation-enhanced segregation of alloy components and phase separation.11-17 Figure 1 shows typical microstructures observed in irradiated materials.9, 18-21 The radiation-induced heterogeneity of the microstructures depends on the initial phase and defect structure of the fresh (non-irradiated) materials and on the type and severity of the radiation environment. Fundamental understanding of heterogeneous three-dimensional microstructure evolution is crucial to the development of advanced radiation tolerant materials that can significa...

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A phase-field modeling of void swelling in the Austenitic stainless steel

Cited by 8 publications

References 23 publications

A Model for Dose Dependence of the Void Swelling in Electron-Irradiated Alloys

A Model for Dose Dependence of the Void Swelling in Electron-Irradiated Alloys

Thermal conductivity of porous polycrystalline PbTe

A review: applications of the phase field method in predicting microstructure and property evolution of irradiated nuclear materials

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