Phase field modeling of sintering: Role of grain orientation and anisotropic properties

Biswas, Sudipta; Schwen, Daniel; Wang, Hao; Okuniewski, Maria A.; Tomar, Vikas

doi:10.1016/j.commatsci.2018.02.057

Cited by 47 publications

(35 citation statements)

References 36 publications

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“…2a shows that, in case-I, the neck between the smaller and larger particle (g 2 ) evolves in three stages (indicate as I, II and II in Fig. 2a)-consistent with literature reports [28,29,31,33,34,42].…”

Section: Kinetics Of Small Particle Evolutionsupporting

confidence: 89%

“…Later, Biswas et al [33,42] demonstrated that sintering kinetics can be enhanced by incorporating anisotropic microstructural properties, rigid body rotation and elastic strain energy to the phase-field models, compared to only thermodynamic considerations employed by Kumar et al and Ahmed et al [31,34]. Notwithstanding, their phase-field simulations were consistent with Lange's three-stage mechanism [31,33,34,42], and showed smooth neck evolution across the three stages, at least in two-particle system. Importantly, these results demonstrate that microstructural evolution during sintering is overwhelmingly driven by the thermodynamic factors, i.e., GB and surface energies [28,29,31,34], rather than specific microstructural and -mechanical features.…”

Section: Introductionmentioning

confidence: 81%

“…Surface (c S ) and grain boundary (c GB ) interfacial energies are known well to drive mass transport during sintering, and consequently determine the evolution of microstructural features [1]. Such features include neck formation, densification and coarsening (i.e., merging small with larger grains) [31][32][33][34]42]. Ahmed et al have shown that c S and c GB are related to phase-field parameters a, b, j q and j g as [34]…”

Section: Methodology Phase-field Modelmentioning

confidence: 99%

“…The three-stage microstructure evolution mechanism was verified by Kumar et al [31] and Ahmed et al [34] by using phase-field modeling, a technique that simulates microstructure by capturing interfaces without explicitly tracking them [40,41]. Later, Biswas et al [33,42] demonstrated that sintering kinetics can be enhanced by incorporating anisotropic microstructural properties, rigid body rotation and elastic strain energy to the phase-field models, compared to only thermodynamic considerations employed by Kumar et al and Ahmed et al [31,34]. Notwithstanding, their phase-field simulations were consistent with Lange's three-stage mechanism [31,33,34,42], and showed smooth neck evolution across the three stages, at least in two-particle system.…”

Section: Introductionmentioning

confidence: 92%

“…1b), respectively. The two-particle configuration, similar to case-I, has been investigated in several phase-field based studies [31][32][33]42], and, therefore, case-I serves as baseline/control for this work. Case-III examines the effect of GB, when g 1 is in contact with flat surface (Fig.…”

Section: Computational Details and Initial Microstructural Geometriesmentioning

confidence: 99%

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Particle curvature effects on microstructural evolution during solid-state sintering: phenomenological insights from phase-field simulations

Choudhuri

Blake

2021

J Mater Sci

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Local curvatures have a profound influence on sintered microstructure. Here, using phase-field simulations, particle curvature effects were phenomenologically investigated by using geometrical configurations of two, three, and four particles, and by systematically varying particle curvatures. Some geometries, involving two, three and four particles, exhibited the expected smooth necklength evolution, where the maximum neck length was determined by grain boundary (GB) energy (c GB ) rather than surface energy (c S ). In contrast, triangular arrangement of particles with unequal radii manifested a secondary necking event in form of a step during neck evolution. The secondary necking event coincided with internal pore collapse, and only specific range of particle radius ratios manifested such a mechanism. c S played a dominant role in triggering the secondary necking event, while c GB determined the remnant microstructure. Broadly, the geometries employed here allow us to computationally examine the sintering of particles that display wide variation in shapes and size distributions.

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Section: Kinetics Of Small Particle Evolutionsupporting

confidence: 89%

Section: Introductionmentioning

confidence: 81%

Section: Methodology Phase-field Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 92%

Section: Computational Details and Initial Microstructural Geometriesmentioning

confidence: 99%

See 3 more Smart Citations

Particle curvature effects on microstructural evolution during solid-state sintering: phenomenological insights from phase-field simulations

Choudhuri

Blake

2021

J Mater Sci

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A phase-field study of neck growth in electron beam powder bed fusion (EB-PBF) process of Ti6Al4V powders under different processing conditions

Rizza

Galati

Iuliano

2022

Int J Adv Manuf Technol

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Traditional sintering processes are carried out to achieve complete material densification. In an electron beam powder bed fusion (EB-PBF) process, the same sintering mechanisms occur but only with the aim to form small connections between the particles (necks). A proper neck formation is central for the EB-PBF process because, among other effects, ensures the thermal stability of the process and helps to avoid smoke phenomena. This work presents a numerical study of neck formation under the EB-PBF processing conditions. A new type of modelling is introduced for the temperature sintering load and included in a phase-field model, which simulates the neck growth during the EB-PBF process of Ti6Al4V powders. The model was validated with an ad-hoc experiment, which provided a deviation with respect to the estimated neck diameter of about 9%. The deviation was investigated by reasonably varying the processing conditions. The results showed that the thermal history, the process time scale (including also the cooling phase), and the geometrical characteristics of the particles significantly affected the sintering rate and neck radius.

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Combined EBSD and Computer-Assisted Quantitative Analysis of the Impact of Spark Plasma Sintering Parameters on the Structure of Porous Materials

Nosewicz

Jurczak

Chromiński

et al. 2022

Metall Mater Trans A

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The paper presents the experimental, numerical, and theoretical investigation of the microstructure of nickel aluminide samples manufactured by spark plasma sintering using electron backscatter diffraction and computer assisted software. The aim of the work was to reveal the evolution of the microscopic and macroscopic parameters related to the microstructure of the material and its dependence on the applied sintering parameters—temperature and pressure. The studied porous samples with different relative density were extracted from various planes and then tested by electron backscatter diffraction to evaluate the crystallographic orientation in every spot of the investigated area. On this foundation, the grain structure of the samples was determined and carefully described in terms of the grain size, shape and boundary contact features. Several parameters reflecting the grain morphology were introduced. The application of the electric current resulting in high temperature and the additional external loading leads to the significant changes in the structure of the porous sample, such as the occurrence of lattice reorientation resulting in grain growth, increase in the grain neighbours, or the evolution of grain ellipticity, circularity, grain boundary length, and fraction. Furthermore, the numerical simulation of heat conduction via a finite element framework was performed in order to analyse the connectivity of the structures. The numerical results related to the thermal properties at the micro- and macroscopic scale—local heat fluxes, deviation angles, and effective thermal conductivity—were evaluated and studied in the context of the microstructural porosity. Finally, the effective thermal conductivity of two-dimensional EBSD maps was compared with those obtained from finite element simulations of three-dimensional micro-CT structures. The relationship between the 2D and 3D results was derived by using the analytical Landauer model.

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Phase field modeling of sintering: Role of grain orientation and anisotropic properties

Cited by 47 publications

References 36 publications

Particle curvature effects on microstructural evolution during solid-state sintering: phenomenological insights from phase-field simulations

Particle curvature effects on microstructural evolution during solid-state sintering: phenomenological insights from phase-field simulations

A phase-field study of neck growth in electron beam powder bed fusion (EB-PBF) process of Ti6Al4V powders under different processing conditions

Combined EBSD and Computer-Assisted Quantitative Analysis of the Impact of Spark Plasma Sintering Parameters on the Structure of Porous Materials

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