New phase-field model for polycrystalline systems with anisotropic grain boundary properties

Moelans, Nele

doi:10.1016/j.matdes.2022.110592

Cited by 15 publications

(3 citation statements)

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“…Grain growth under the assumption of anisotropic GB properties has been simulated by a variety of methods (20,94,(105)(106)(107). Using a 2D grain-growth simulation model with fully anisotropic GB properties, Florez et al (20) showed that when anisotropic GB energies are assumed, some GBs move opposite to the direction predicted by their curvature, as observed in recent experiments and in defiance of Equation 1 (17,18).…”

Section: Simulations With Anisotropic Grain Boundary Propertiesmentioning

confidence: 99%

“…Simulations of GB migration at the continuum level have been demonstrated with the Monte Carlo method (91), MD (21,92), phase-field methods (93,94), and other approaches. Here, we focus on simulations based on the threshold dynamics (TD) model; this is an extension of the mean curvature approach (95,96) to a general setting with multiple grains (97).…”

Section: Simulations Of Grain Boundary Migration During Grain Growthmentioning

confidence: 99%

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Grain Boundary Migration in Polycrystals

Rohrer

Chesser

Krause

et al. 2023

Annu. Rev. Mater. Res.

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Grain boundaries in polycrystalline materials migrate to reduce the total excess energy. It has recently been found that the factors governing migration rates of boundaries in bicrystals are insufficient to explain boundary migration in polycrystals. We first review our current understanding of the atomistic mechanisms of grain boundary migration based on simulations and high-resolution transmission electron microscopy observations. We then review our current understanding at the continuum scale based on simulations and observations using high-energy diffraction microscopy. We conclude that detailed comparisons of experimental observations with atomistic simulations of migration in polycrystals (rather than bicrystals) are required to better understand the mechanisms of grain boundary migration, that the driving force for grain boundary migration in polycrystals must include factors other than curvature, and that current simulations of grain growth are insufficient for reproducing experimental observations, possibly because of an inadequate representation of the driving force. Expected final online publication date for the Annual Review of Materials Research, Volume 53 is July 2023. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.

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Section: Simulations With Anisotropic Grain Boundary Propertiesmentioning

confidence: 99%

Section: Simulations Of Grain Boundary Migration During Grain Growthmentioning

confidence: 99%

Grain Boundary Migration in Polycrystals

Rohrer

Chesser

Krause

et al. 2023

Annu. Rev. Mater. Res.

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“…During the sintering process, the anisotropy of grain boundary energy between grains with different orientations can lead to significant variations in the final sintered morphology [55]. To simulate the directional growth of plate-like Al 2 O 3 particles, Shinagawa et al [56] employed ellipsoidal functions to calculate the gradient energy coefficients:…”

Section: Phase-field Sintering Model With Anisotropic Interfacial Energymentioning

confidence: 99%

Phase-Field Simulation of Sintering Process: A Review

Xue,

2024

CMES

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Sintering, a well-established technique in powder metallurgy, plays a critical role in the processing of high melting point materials. A comprehensive understanding of structural changes during the sintering process is essential for effective product assessment. The phase-field method stands out for its unique ability to simulate these structural transformations. Despite its widespread application, there is a notable absence of literature reviews focused on its usage in sintering simulations. Therefore, this paper addresses this gap by reviewing the latest advancements in phase-field sintering models, covering approaches based on energy, grand potential, and entropy increase. The characteristics of various models are extensively discussed, with a specific emphasis on energy-based models incorporating considerations such as interface energy anisotropy, tensor-form diffusion mechanisms, and various forms of rigid particle motion during sintering. Furthermore, the paper offers a concise summary of phase-field sintering models that integrate with other physical fields, including stress/strain fields, viscous flow, temperature field, and external electric fields. In conclusion, the paper provides a succinct overview of the entire content and delineates potential avenues for future research.

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