Pore and grain boundary migration under a temperature gradient: A phase-field model study

doi:10.1088/0965-0393/24/3/035019

Title: Pore and grain boundary migration under a temperature gradient: A phase-field model study

Full Record
Other Related Research

Abstract

In this study, the collective migration behavior of pores and grain boundaries under a temperature gradient is studied for simple single crystal, bi-crystal and polycrystal configurations with a phase-field model formulism. For simulation of the microstructure of solids, composed of pores and grain boundaries, the results indicate that not only the volume fraction of pores, but also its spatial partitioning between the grain boundary junctions and the grain boundary segments appears to be important. In addition to various physical properties, the evolution kinetics, under given temperature gradients, will be strongly influenced with the initial morphology of a poly-crystalline microstructure.

Authors:

Biner, S. B. ^[1]

Idaho National Lab. (INL), Idaho Falls, ID (United States)

Publication Date:: 2016-03-16

Research Org.:: Idaho National Lab. (INL), Idaho Falls, ID (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1294278

Report Number(s):: INL/JOU-15-35523
Journal ID: ISSN 0965-0393

Grant/Contract Number:: AC07-05ID14517

Resource Type:: Accepted Manuscript

Journal Name:: Modelling and Simulation in Materials Science and Engineering

Additional Journal Information:: Journal Volume: 24; Journal Issue: 3; Journal ID: ISSN 0965-0393

Publisher:: IOP Publishing

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; phase-field model; pore and grain boundary migration

Citation Formats


                    Biner, S. B. Pore and grain boundary migration under a temperature gradient: A phase-field model study.  United States: N. p., 2016. 
        Web.  doi:10.1088/0965-0393/24/3/035019.

Copy to clipboard


                    Biner, S. B. Pore and grain boundary migration under a temperature gradient: A phase-field model study.  United States.  doi:10.1088/0965-0393/24/3/035019.

Copy to clipboard


                    Biner, S. B. Wed .  
        "Pore and grain boundary migration under a temperature gradient: A phase-field model study".  United States.  doi:10.1088/0965-0393/24/3/035019.  https://www.osti.gov/servlets/purl/1294278.

Copy to clipboard


                    
@article{osti_1294278,

  title        = {Pore and grain boundary migration under a temperature gradient: A phase-field model study},

  author       = {Biner, S. B.},

  abstractNote = {In this study, the collective migration behavior of pores and grain boundaries under a temperature gradient is studied for simple single crystal, bi-crystal and polycrystal configurations with a phase-field model formulism. For simulation of the microstructure of solids, composed of pores and grain boundaries, the results indicate that not only the volume fraction of pores, but also its spatial partitioning between the grain boundary junctions and the grain boundary segments appears to be important. In addition to various physical properties, the evolution kinetics, under given temperature gradients, will be strongly influenced with the initial morphology of a poly-crystalline microstructure.},

  doi          = {10.1088/0965-0393/24/3/035019},

  journal      = {Modelling and Simulation in Materials Science and Engineering},

  number       = 3,

  volume       = 24,

  place        = {United States},

  year         = {2016},

  month        = {3}

}

Copy to clipboard

Journal Article:

Free Publicly Available Full Text

Accepted Manuscript (DOE)

Publisher's Version of Record

DOI: 10.1088/0965-0393/24/3/035019

Other availability

Search WorldCat to find libraries that may hold this journal

Citation Metrics:

Cited by: 1 work

Citation information provided by
Web of Science

Save / Share:

Export Metadata

Save to My Library

Similar Records in DOE PAGES and OSTI.GOV collections:

Testing thermal gradient driving force for grain boundary migration using molecular dynamics simulations

Journal Article Bai, Xian-Ming ; Zhang, Yongfeng ; Tonks, Michael R. - Acta Materialia

Strong thermal gradients in low-thermal-conductivity ceramics may drive extended defects, such as grain boundaries and voids, to migrate in preferential directions. In this work, molecular dynamics simulations are conducted to study thermal gradient driven grain boundary migration and to verify a previously proposed thermal gradient driving force equation, using uranium dioxide as a model system. It is found that a thermal gradient drives grain boundaries to migrate up the gradient and the migration velocity increases under a constant gradient owing to the increase in mobility with temperature. Different grain boundaries migrate at very different rates due to their different intrinsicmore »« less
DOI: 10.1016/j.actamat.2014.11.019
Testing thermal gradient driving force for grain boundary migration using molecular dynamics simulations

Journal Article Bai, Xian-Ming ; Zhang, Yongfeng ; Tonks, Michael R. - Acta Materialia

Strong thermal gradients in low-thermal-conductivity ceramics may drive extended defects, such as grain boundaries and voids, to migrate in preferential directions. In this work, molecular dynamics simulations are conducted to study thermal-gradient-driven grain boundary migration and to verify a previously proposed thermal gradient driving force equation, using uranium dioxide as a model system. It is discovered that a thermal gradient drives grain boundaries to migrate up the gradient, and the migration velocity increases under a constant gradient owing to the increase in mobility with temperature. Different grain boundaries migrate at very different rates owing to their different intrinsic mobilities. Themore »« less
Cited by 6
DOI: 10.1016/j.actamat.2014.11.019

Full Text Available
Simulation of grain growth and pore migration in a thermal gradient

Journal Article Tikare, V ; Holm, E A - Journal of the American Ceramic Society

The Potts Monte Carlo simulation was used to simulate microstructural evolution in uranium dioxide fuel rods. During service, grain growth, pore migration, and thermal segregation of the pores and UO{sub 2} occur in the rods in a thermal gradient. In this investigation, the authors developed a model which simulates simultaneous grain growth, pore migration, and thermal segregation of the pores and UO{sub 2} in a temperature gradient. Grain growth in a thermal gradient was simulated using the Monte Carlo Potts model technique developed by Anderson, Srolovitz, and co-workers. Pore migration was simulated using conserved dynamics with minimum-energy exchanges at amore »« less
DOI: 10.1111/j.1151-2916.1998.tb02365.x
Demonstrating the Temperature Gradient Impact on Grain Growth in UO2 Using the Phase Field Method

Journal Article Tonks, Michael R ; Zhang, Yongfeng ; Bai, Xianming ; ... - Materials Research Letters

Grain boundaries (GBs) are driven to migrate up a temperature gradient. In this work, we use a phase field (PF) model to investigate the impact of temperature gradients on normal grain growth. GB motion in 2D UO2 polycrystals is predicted under increasing temperature gradients. We find that the temperature gradient does not significantly impact the average grain growth behavior, because the curvature driving force is dominant. However, it does cause significant local migration of the individual grains. In addition, the change in the GB mobility due to the temperature gradient results in larger grains in the hot portion of themore » polycrystal.« less
DOI: 10.1080/21663831.2013.849300
UO ₂ Grain Growth: Developing Phase Field Models for Pore Dragging, Solute Dragging and Anisotropic Grain Boundary Energies

Technical Report Ahmed, K. ; Tonks, M. ; Zhang, Y. ; ...

A detailed phase field model for the effect of pore drag on grain growth kinetics was implemented in MARMOT. The model takes into consideration both the curvature-driven grain boundary motion and pore migration by surface diffusion. As such, the model accounts for the interaction between pore and grain boundary kinetics, which tends to retard the grain growth process. Our 2D and 3D simulations demonstrate that the model capture all possible pore-grain boundary interactions proposed in theoretical models. For high enough surface mobility, the pores move along with the migrating boundary as a quasi-rigid-body, albeit hindering its migration rate compared tomore »« less
DOI: 10.2172/1360119

Full Text Available

Similar Records