Three-dimensional phase field simulation of intragranular void formation and thermal conductivity in irradiated α-Fe

Wang, Yuanyuan; Ding, Jing; Chen, Yonggang; Zhao, Jijun

doi:10.1007/s10853-018-2376-3

Cited by 17 publications

(2 citation statements)

References 59 publications

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“…And the evolution of microstructure is predicted by solving a set of mathematical equations which governs the field's evolution. It has been demonstrated in quite a lot of areas, such as grain growth, dendrite growth, crack propagation, spinodal decomposition, and so on [16][17][18]. For example, Wang and Khachaturyan investigated the morphology of a single coherent precipitate during the growth within two dimensions (2D) [19].…”

Section: B (2019) 101 -110mentioning

confidence: 99%

Three-dimensional phase field simulation for rafting of multiparticle precipitate in elastic inhomogeneous alloy under external stress

Mao

Kong

Shuai

et al. 2019

J min metall B Metall

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Nickel-based super alloys are the main candidate materials for aero-engines, gas turbine blades etc. This paper focuses on the simulation of nucleation and growth kinetics of γ' phase, and stress response mechanism of γ' phase particles during their preferential coarsening (rafting) in elastic inhomogeneous system. A phase-field model is employed in the present study, which incorporates chemical, interfacial, and elastic energies, and it couples essentially to externally imposed mechanical field. Due to the limitations of the 2D model on analyzing the shape and size of the precipitate particles, the process of γ' phase particles growing and coarsening is further modeled by performing 3D simulation. The results show that the average particle size is linearly related to the evolution time and satisfies the Lifshitz-Slyozov-Wagner (LSW) classical coarsening theory when the external stress is not applied. Particles exhibit a strong special orientation under tensile stress, and the orientation is in excellent agreement with previous studies. In the nucleation stage, the collision and coalescence between particles promote rafting significantly, and the number of soft particles is obviously larger than that of hard particles. In the coarsening stage, the growth rate of soft particles is higher than that of hard particles. Three-dimensional simulation results show that the effect of final characteristic size of precipitated particles is not significant by external loads. The morphology evolution and coarsening mechanism of the precipitated particles are of great significance for studying the strengthening mechanism of super-alloy.

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Section: B (2019) 101 -110mentioning

confidence: 99%

Three-dimensional phase field simulation for rafting of multiparticle precipitate in elastic inhomogeneous alloy under external stress

Mao

Kong

Shuai

et al. 2019

J min metall B Metall

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“…It becomes a very powerful method to naturally produce the complex microstructural morphologies and relate to the macroscopic properties of materials, which has already been successfully applied to predict the behaviors of irradiation-induced defects in nuclear materials [16,37,38,[62][63][64][65]. In combination with Fourier's law of heat transfer, the effect of microstructure evolutions on effective thermal conductivities has been widely investigated [16,23,[66][67][68][69][70][71]. Liang et al developed a model to investigate the effects of recrystallization, grain size, and fission gas bubble on the effective thermal conductivity of nuclear fuels under irradiation [68].…”

Section: Introductionmentioning

confidence: 99%

Phase-field microstructure-based effective thermal conductivity calculations in tungsten

Li¹,

Jin²,

Xue³

et al. 2022

Nucl. Fusion

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Using a phase-field approach with the heat conduction equation, we predict the grain growth behaviors in tungsten (W) and their effects on the effective thermal conductivity. Results show that the simulated grain growth kinetics is basically consistent with the experimental observations. An empirical correlation describing the averaged grain area as a function of the temperature and time is derived. Further, we study the effect of the grain growth, columnar crystal structure, and the recrystallization on the effective thermal conductivity of W. It is found that the effective thermal conductivity non-linearly increases with increasing the grain size, and a simple correlation of converting two-dimension into three-dimension effective thermal conductivity is obtained. Interestingly, the effective thermal conductivity of the columnar crystal is relatively high along the elongated direction and higher than that of the isometric crystal. Nevertheless, the effective thermal conductivity decreases with the occurrence of the recrystallization due to the increased grain boundary density. Our results reveal that grain growth and grain structure can affect the capacity of the heat transfer at high temperatures, which could be considered in the transient event of the long-time service of W materials in fusion devices.

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Phase-Field Modelling of Void Evolution in Binary Alloys Under Irradiation

Lu,

Yang,

et al. 2023

Springer Proceedings in Physics

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Three-dimensional phase field simulation of intragranular void formation and thermal conductivity in irradiated α-Fe

Cited by 17 publications

References 59 publications

Three-dimensional phase field simulation for rafting of multiparticle precipitate in elastic inhomogeneous alloy under external stress

Three-dimensional phase field simulation for rafting of multiparticle precipitate in elastic inhomogeneous alloy under external stress

Phase-field microstructure-based effective thermal conductivity calculations in tungsten

Phase-Field Modelling of Void Evolution in Binary Alloys Under Irradiation

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