On the consideration of interactions between dislocations and grain boundaries in crystal plasticity finite element modeling – Theory, experiments, and simulations

Ma, Anxin; Roters, Franz; Raabe, Dierk

doi:10.1016/j.actamat.2006.01.004

Cited by 215 publications

(122 citation statements)

References 19 publications

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“…The strength of the method lies particularly in properly mapping the strong kinematical influence of crystalline anisotropy during plastic straining, which as a rule also leads to the prediction of the correct tendency in the resulting orientation changes. This has been shown in a number of studies [4,[11][12][13][14][15][16] where predictions obtained by the crystal plasticity finite element method were compared in detail with corresponding micromechanical experiments with respect to strain, texture and forces. Conventional crystal plasticity models (e.g.…”

Section: Motivationmentioning

confidence: 99%

On the origin of deformation-induced rotation patterns below nanoindents

et al. 2008

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Section: Motivationmentioning

confidence: 99%

On the origin of deformation-induced rotation patterns below nanoindents

et al. 2008

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“…Consequently, simulations were run until stabilization of the ratcheting curve was reached. Although the grain boundary engineering paradigm, in the investigation about damage nucleation, has focused mainly on the inherent properties of interfaces, recent studies, in the crystal plasticity framework, have started pointing out the importance of the interaction between dislocation activity in the interior grains and grain boundaries 198 . Querin et al 199 investigated the formation of micro voids at certain grain boundary triple point junctions in thin sheets of rolled aluminum alloy AA6022, subjected to monotonic tensile loading, using CPFEM with an experimentally reconstructed microstructure.…”

Section: Sinha and Ghoshmentioning

confidence: 99%

Modelling Polycrystalline Materials: An Overview of Three-Dimensional Grain-Scale Mechanical Models

Benedetti

Barbe

2013

J. Multiscale Modelling

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A survey of recent contributions on three-dimensional grain-scale mechanical modelling of polycrystalline materials is given in this work. The analysis of material microstructures requires the generation of reliable micro-morphologies and affordable computational meshes as well as the description of the mechanical behavior of the elementary constituents and their interactions. The polycrystalline microstructure is characterized by the topology, morphology and crystallographic orientations of the individual grains and by the grain interfaces and microstructural defects, within the bulk grains and at the inter-granular interfaces. Their analysis has been until recently restricted to twodimensional cases, due to high computational requirements. In the last decade, however, the wider affordability of increased computational capability has promoted the development of fully three-dimensional models. In this work, different aspects involved in the grain-scale analysis of polycrystalline materials are considered. Different techniques for generating artificial micro-structures, ranging from highly idealized to experimentally based high-fidelity representations, are briefly reviewed. Structured and unstructured meshes are discussed. The main strategies for constitutive modelling of individual bulk grains and inter-granular interfaces are introduced. Some attention has also been devoted to three-dimensional multiscale approaches and some established and emerging applications have been discussed.

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“…When they encounter a grain boundary, mobile dislocations will accumulate at the grain boundary in the form of pile ups and give rise to the stress concentration there. Among all the types of interactions between dislocations and grain boundaries, slip transmission makes important contribution to the polycrystalline deformation, and the grain boundary effect is included in the model by introducing an thermally activated slip transmission concept [9]. The activation enthalpy quantifies the transmission probability for the mobile dislocations and it is considered as an energy barrier for those grain boundary elements.…”

Section: Grain Boundary Effectmentioning

confidence: 99%

“…The activation enthalpy quantifies the transmission probability for the mobile dislocations and it is considered as an energy barrier for those grain boundary elements. This energy barrier is equal to the elastic energy of forming the misfit dislocation at the interface [9][10].…”

Section: Grain Boundary Effectmentioning

confidence: 99%

Dislocation Density Based Crystal Plasticity Finite Element Model of Polycrystals with Grain Boundary Effect

Leng

Alankar

Field

et al. 2013

Proceedings of the 2nd World Congress on Integrated Computational Materials Engineering (ICME)

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Abstract:Grain boundaries play an important role in determining the mechanical properties of metallic materials. The impedance of dislocation motion at the boundary results in a strengthening mechanism. In addition, dislocations can pile-up, be transmitted or be absorbed by the grain boundaries based on the local stress state and grain boundary character. In this study, a dislocation density based crystal plasticity finite element model is applied to incorporate the interaction between the dislocations and the grain boundaries, and a simulation is conducted on polycrystalline alpha iron deformed to 12% in uniaxial tension. The results indicate that the geometrically necessary dislocation density is generally higher near the grain boundary than within the grain interior. Taylor factor mismatch sometimes reveals strong localization effects near the grain boundaries. Introduction:

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On the consideration of interactions between dislocations and grain boundaries in crystal plasticity finite element modeling – Theory, experiments, and simulations

Cited by 215 publications

References 19 publications

On the origin of deformation-induced rotation patterns below nanoindents

On the origin of deformation-induced rotation patterns below nanoindents

Modelling Polycrystalline Materials: An Overview of Three-Dimensional Grain-Scale Mechanical Models

Dislocation Density Based Crystal Plasticity Finite Element Model of Polycrystals with Grain Boundary Effect

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