Phase-field investigation on the growth orientation angle of aluminum carbide with a needle-like structure at the surface of graphite particles

Cai, Yuhan; Wang, Fei; Selzer, Michael; Nestler, Britta

doi:10.1088/1361-651x/ab2351

Cited by 5 publications

(2 citation statements)

References 53 publications

(63 reference statements)

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“…Ghosh et al [34] used a three-dimensional phase field method to study the microstructural evolution of binary eutectic alloy with interphase boundary anisotropy during the solidification process. Cai et al [35] simulated the critical orientation angle of the anisotropic structure of a needle-like Al 4 C 3 . Mao et al [36] considered the anisotropic interfacial energy and elastic interaction to simulate the evolution of the precipitation morphology of β in Al-Mg-Si alloy.…”

Section: Introductionmentioning

confidence: 99%

Phase-Field Simulation of δ Hydride Precipitation with Interfacial Anisotropy

Nie,

Shi,

Yang

et al. 2023

CMC

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Previous studies of δ hydride in zirconium alloys have mainly assumed an isotropic interface. In practice, the difference in crystal structure at the interface between the matrix phase and the precipitate phase results in an anisotropic interface. With the purpose of probing the real evolution of δ hydrides, this paper couples an anisotropy function in the interfacial energy and interfacial mobility. The influence of anisotropic interfacial energy and interfacial mobility on the morphology of δ hydride precipitation was investigated using the phase-field method. The results show that the isotropy hydride precipitates a slate-like morphology, and the anisotropic δ hydride precipitates at the semi-coherent and non-coherent interfaces exhibited parallelogram-like and needle-like, which is consistent with the actual experimental morphology. Compared with the coherent interface, the semi-coherent or non-coherent interface adjusts the lattice mismatch, resulting in lower gradient energy that is more consistent with the true interfacial state. Simultaneously, an important chain of relationships is proposed, in the range of I x < I y < 1.5I x (I y < I x or I y > 1.5I x ), with the increase of the anisotropic mobility I y in the y-axis, the gradient energy increases (decreases), the tendency of the non-coherent (semi-coherent) relationship at the interface, and the precipitation rate of hydride decreases (increases). Furthermore, the inhomogeneous stress distribution around the hydride leads to a localized enrichment of the hydrogen concentration, producing a hydride tip. The study of interfacial anisotropy is informative for future studies of δ hydride precipitation orientation and properties.

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Section: Introductionmentioning

confidence: 99%

Phase-Field Simulation of δ Hydride Precipitation with Interfacial Anisotropy

Nie,

Shi,

Yang

et al. 2023

CMC

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“…Considering the daunting task of statistical and theoretical investigations by precisely controlled experiments, it is of great significance and feasibility to gain insight into the peritectic transition by using computational materials simulations. The phase-field model has been proven to be a powerful modeling technique to simulate the microstructural evolution in many alloy systems [11][12][13] , including peritectic alloys. By using phase-field method, Tiaden et al [14] studied the engulfing microstructure, in which the peritectic phase grows over the pro-peritectic phase.…”

Section: Introductionmentioning

confidence: 99%

Phase-Field Investigation on the Peritectic Transition in Fe-C System

et al. 2021

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We adopt a thermodynamically consistent multi-phase, multi-component phase-field model to investigate the morphological evolution of peritectic transition in carbon steel though 2-D and 3-D simulations. By using phase-field method, we rationalize the peritectic solidification in both 2-D and 3-D simulations under different liquid supersaturations as well as on the δ particle with distinct microstructures. Through the comparison between 2-D and 3-D simulation results, we clarify the reason for the different growth rate of γ phase in two and three dimensions. In 3-D simulation, we observe the unequal growth rate of γ phase in radial and axis directions. In addition, a novel measurement method is proposed to determine the dynamic contact angle. We anticipate that the simulation results can be applied to interpret the isothermal peritectic transition with a liquid supersaturation in alloys.

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Misoriented Lamellar Microstructures in Mo‐Si‐Ti Alloy Due to Asymmetrical Nucleation Distance and Interfacial Energies: A Phase‐Field Analysis

Cai,

Wang,

Nestler

2024

Adv Eng Mater

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The material properties are crucially affected by the microstructure formed during solidification, which is typically divided into three stages: (I) Early stage of nucleation in molecule scale, which is beyond the scope of the mean‐field model; (II) Middle stage of nucleation, where the dispersed nuclei have formed; (III) Late stage of nucleation, where the nuclei contact with each other. In previous studies, the formation of the stable eutectic lamellae is mostly based on the assumption that a stable solid‐solid interface has already been established, corresponding to the stage (III), and the growth stage (II) is often overlooked. In the current work, by varying the nucleation density and distance, we propose an alternative mechanism for the misoriented microstructure formation in Mo‐Si‐Ti alloy that considers nucleation stage (II). Furthermore, the misoriention angle as a function of the nucleation density, distance, and the interfacial energies is quantified by systematic phase‐field simulations. The simulated composition distribution reveals the mechanism for the misorientation of eutectic lamellar pairs, which becomes more pronounced when the solids‐fluid interfacial energies are unequal. We expect that the present work provides a potential perspective for the fundamental understanding of misoriented microstructures in solidification.This article is protected by copyright. All rights reserved.

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Phase-field investigation on the growth orientation angle of aluminum carbide with a needle-like structure at the surface of graphite particles

Cited by 5 publications

References 53 publications

Phase-Field Simulation of δ Hydride Precipitation with Interfacial Anisotropy

Phase-Field Simulation of δ Hydride Precipitation with Interfacial Anisotropy

Phase-Field Investigation on the Peritectic Transition in Fe-C System

Misoriented Lamellar Microstructures in Mo‐Si‐Ti Alloy Due to Asymmetrical Nucleation Distance and Interfacial Energies: A Phase‐Field Analysis

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