Journal ArticleDOI
Influence of anisotropic grain boundary properties on the evolution of grain boundary character distribution during grain growth—a 2D level set study
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In this paper, the influence of anisotropic grain boundary energy and mobility on microstructure evolution was investigated using a 2D level set model of polycrystal microstructures, and it was shown that grain growth alone does not seem to promote any significantly increased overall presence of CSL boundaries.Abstract:
The present study elaborates on a 2D level set model of polycrystal microstructures that was recently established by adding the influence of anisotropic grain boundary energy and mobility on microstructure evolution. The new model is used to trace the evolution of grain boundary character distribution during grain growth. The employed level set formulation conveniently allows the grain boundary characteristics to be quantified in terms of coincidence site lattice (CSL) type per unit of grain boundary length, providing a measure of the distribution of such boundaries. In the model, both the mobility and energy of the grain boundaries are allowed to vary with misorientation. In addition, the influence of initial polycrystal texture is studied by comparing results obtained from a polycrystal with random initial texture against results from a polycrystal that initially has a cube texture. It is shown that the proposed level set formulation can readily incorporate anisotropic grain boundary properties and the simulation results further show that anisotropic grain boundary properties only have a minor influence on the evolution of CSL boundary distribution during grain growth. As anisotropic boundary properties are considered, the most prominent changes in the CSL distributions are an increase of general low-angle Σ1 boundaries as well as a more stable presence of Σ3 boundaries. The observations also hold for the case of an initially cube-textured polycrystal. The presence of this kind of texture has little influence over the evolution of the CSL distribution. Taking into consideration the anisotropy of grain boundary properties, grain growth alone does not seem to be sufficient to promote any significantly increased overall presence of CSL boundaries.read more
Citations
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Journal ArticleDOI
3D level set modeling of static recrystallization considering stored energy fields
Benjamin Scholtes,Romain Boulais-Sinou,Amico Settefrati,Daniel Pino Muñoz,Isabelle Poitrault,Aurore Montouchet,Nathalie Bozzolo,Marc Bernacki +7 more
TL;DR: A new efficient implementation of the static recrystallization (SRX) model which aims to overcome this limitation by taking full advantage of recent numerical developments (Shakoor et al., 2015; Scholtes et al, 2015).
Journal ArticleDOI
Viewpoint on the Formation and Evolution of Annealing Twins During Thermomechanical Processing of FCC Metals and Alloys
Nathalie Bozzolo,Marc Bernacki +1 more
TL;DR: The question of the formation mechanism of annealing twins in face-centered cubic metals and alloys, which is still not resolved in spite of the fact that the existence of these defects is known for long, is addressed in this article.
Journal ArticleDOI
2D finite element modeling of misorientation dependent anisotropic grain growth in polycrystalline materials: Level set versus multi-phase-field method
TL;DR: In this paper, two full field methods (level set (LS) and multi-phase field (MPF) methods) are implemented into finite element (FE) formulations for simulation of anisotropic grain growth in polycrystalline structures.
Journal ArticleDOI
A combined crystal plasticity and graph-based vertex model of dynamic recrystallization at large deformations
TL;DR: In this paper, a mesoscale model of microstructure evolution is formulated by combining a crystal plasticity model with a graph-based vertex algorithm, which provides a versatile formulation capable of capturing finite-strain deformations, development of texture and microstructures evolution through recrystallization.
Geometric criteria for low interfacial energy
TL;DR: A review of geometric criteria for low interfacial energy which have been proposed in the literature is given in this article, which includes: (i) low reciprocal volume density of coincidence sites; (ii) high planar density of similarity sites, GAMMA; (iii) high GAMMA at constant interplanar spacing, d; (iv) large d; and (v) high density of locked-in rows of atoms.
References
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Journal ArticleDOI
Approaches to Modeling of Recrystallization
TL;DR: A review of the current status of various approaches to modeling grain refinement due to recrystallization can be found in this paper, where the authors discuss the advantages and disadvantages of different methods, underlying assumptions, physical relevance, implementation issues and computational efficiency.
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Comparing grain boundary energies in face-centered cubic metals: Al, Au, Cu and Ni
TL;DR: In this paper, the energy of grain boundaries in Al, Au, Cu and Ni were calculated using atomistic simulations and it was shown that grain boundary energies in different elements are strongly correlated.
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Level set framework for the numerical modelling of primary recrystallization in polycrystalline materials
TL;DR: In this paper, a level set framework for the numerical modeling of primary static recrystallization in polycrystalline material is described, and the topological evolution of the grain structure is simulated in two and three dimensions, based on a kinetic law relating the velocity of the boundary to the thermodynamic driving force.
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Simulation of discontinuous dynamic recrystallization in pure Cu using a probabilistic cellular automaton
TL;DR: In this paper, a cellular automaton algorithm with probabilistic cell switches is employed in the simulation of dynamic discontinuous recrystallization, and the model is shown to capture both the microstructural evolution in terms of grain size and grain shape changes and also the macroscopic flow stress behavior of the material.
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Level set framework for the finite-element modelling of recrystallization and grain growth in polycrystalline materials
TL;DR: In this article, a level set framework for the finite-element modeling of recrystallization in polycrystalline materials, including the nucleation, primary re-stallization and grain growth stages, is described.