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Meeting 2018 TMS Annual Meeting & Exhibition
Symposium Non-equilibrium Features of Grain Boundaries
Presentation Title Grain Coarsening in Two-dimensional Phase-field Models with an Orientation Field
Author(s) Bálint Korbuly, Tamás Pusztai, Hervé Henry, Mathis Plapp, Markus Apel, László Gránásy
On-Site Speaker (Planned) Tamás Pusztai
Abstract Scope In the literature, contradictory results have been published regarding the form of the limiting grain size distribution (LGSD) that characterizes the late stage grain coarsening in (quasi-)two-dimensional polycrystalline systems. While experiments and the phase-field crystal (PFC) model indicate a lognormal distribution, other works including theoretical studies, the multi-phase-field (MPF) and orientation-field (OF) models yield significantly different distributions. We show that the coarse grained phase-field models yield very similar limiting size distributions that differ from the theoretical predictions, but in the case of OF models a partial detection of the small angle grain boundaries leads to a lognormal distribution close to those seen in the experiments and the PFC simulations. This indicates that the LGSD is critically sensitive to the details of the evaluation process, and raises the possibility that the differences among the LGSD results from different sources may originate from differences in the detection of small angle grain boundaries.
Proceedings Inclusion? Planned: Supplemental Proceedings volume

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A New Mathematical Framework for Simulation of Grain Growth
Activation Volume Tensors for Atomistic Events at Grain Boundaries
An Atomistic Survey of Grain Boundary – Dislocation Interactions in FCC Nickel
Atomic-scale Study of Twin Growth in Zirconium
Changes in the Grain Boundary Character and Curvature Distributions of Nickel at Multiple Annealing Stages from Three-dimensional X-ray Microscopy
Characterization of Single Grain Boundary and Interface Mechanical Properties Using In-situ TEM
Competing Effects of Nonmetal Impurities and Planned Metallic Dopants on Grain Boundary Deformation
Continuum Framework for Dislocation Structure, Energy and Dynamics of Dislocation Arrays and Low Angle Grain Boundaries
CSL Pinning Mechanism Associated with Non-thermally Activated Mobility in Sigma 7 and Sigma 9 Grain Boundaries
Discovering the Atomic Building Blocks of Grain Boundaries Using Machine Learning
Dislocation Interactions with Bi-phase Interfaces Using Phase Field Dislocation Dynamics (PFDD)
Dislocation Nucleation from Grain Boundary: A Comparison between Conventional MD and Accelerated MD
Dislocations, Twins, Grain Boundaries and their Interactions in HCP Rhenium
Effect of Neutron Irradiation on Deformation Homogeneity in Polycrystalline Materials
Exploring the Interactions between Grain Boundaries and Precipitates in a Ni-Al Using Molecular Dynamics
Grain Boundaries Driven Far from Equilibrium by a Continuous Influx of Vacancies
Grain Boundary Factors Related to Void Formation
Grain Boundary Network Structural Metrics and Phase Transitions
Grain Boundary Spinodals: Faceting Instability and the Role of Junction Energetics
Grain Boundary Statistical Mechanics: A Disconnection Dynamics Approach
Grain Boundary Structure Characterization with the Smooth Overlap of Atomic Positions Descriptor
Grain Coarsening in Two-dimensional Phase-field Models with an Orientation Field
Mapping of 3D Grain Boundary Characteristics by LabDCT
Mechanical Behavior of (Ni,Fe)Cr2O4 Spinel Grain Boundaries Studied by Molecular Dynamics Simulations
Reconciling Grain Growth and Shear-coupled GB Migration
Structures and Transitions in BCC W Grain Boundaries
The Effect of Segregation and Precipitation on Grain Growth in Eu-doped MgAl2O4-spinel
The Influence of 3-D Structure on the Mechanical Behavior of Layered Nanocomposites
The Role of Non-equilibrium Grain Boundary Structure in Radiation Tolerance and Thermal Stability
Thermally Induced Grain Coarsening in Alpha Iron
Topological Defects in 2D Orientation-field Models for Grain Growth
Understanding the Behavior of a Polycrystalline Aggregate with Sub-crystal Resolution Using High Energy X-rays
Understanding the Effects of Hydrogen on the Plasticity of Individual Crystals within a Polycrystalline Nickel Aggregate Using High Energy X-ray Diffraction and High Pressure Torsion.
Understating the Deformation and Fracture Behaviors of Heterogeneous Lamella Structures
Unraveling Anti-thermal Behavior in a Variety of FCC Metals

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