3D simulations of microstructure and comparison with experimental microstructure coming from O.I.M analysis

St-Pierre, Luc; Héripré, Eva; Dexet, Marie; Crépin, Jérôme; Bertolino, G.; Bilger, Nicolas

doi:10.1016/j.ijplas.2007.10.004

Cited by 74 publications

(36 citation statements)

References 26 publications

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“…The generation of synthetic polycrystalline microstructures has been the subject of numerous studies (Groeber et al, 2008;St-Pierre et al, 2008;Bhandari et al, 2007;Fritzen et al, 2009). Among the most widely used methods, the simplest is to create grains of the same topology and to duplicate them in order to fill the entire volume of the microstructure.…”

Section: The Numerical Modelmentioning

confidence: 99%

Micro-mechanical modelling of high cycle fatigue behaviour of metals under multiaxial loads

Robert

Saintier

Palin‐Luc

et al. 2012

Mechanics of Materials

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is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. An analysis of high cycle multiaxial fatigue behaviour is conducted through the numerical simulation of polycrystalline aggregates using the finite element method. The metallic material chosen for investigation is pure copper, which has a Face Centred Cubic (FCC) crystalline microstructure. The elementary volumes are modelled in 2D using an hypothesis of generalised plane strain and consist of 300 equi-probability, randomly oriented grains with equiaxed geometry. The aggregates are loaded at levels equivalent to the average macroscopic fatigue strength at 10 7 cycles. The goal is to compute the mechanical quantities at the mesoscopic scale (i.e., average within the grain) after stabilization of the local cyclic behaviour. The results show that the mesoscopic mechanical variables are characterised by high dispersion. A statistical analysis of the response of the aggregates is undertaken for different loading modes: fully reversed tensile loads, torsion and combined in-phase tension-torsion. Via the calculation of the local mechanical quantities for a sufficiently large number of different microstructures, a critical analysis of certain multiaxial endurance criteria (Crossland, Dang Van and Matake) is conducted. In terms of material behaviour models, it is shown that elastic anisotropy strongly affects the scatter of the mechanical parameters used in the different criteria and that its role is predominant compared to that of crystal plasticity. The analysis of multiaxial endurance criteria at both the macroscopic and mesoscopic scales clearly show that the critical plane type criteria (Dang Van and Matake) give an adequate estimation of the shear stress but badly reflect the scatter of the normal stress or the hydrostatic stress.

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Section: The Numerical Modelmentioning

confidence: 99%

Micro-mechanical modelling of high cycle fatigue behaviour of metals under multiaxial loads

Robert

Saintier

Palin‐Luc

et al. 2012

Mechanics of Materials

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“…Geometrical models, in comparison, are conceptually simpler and computationally cheaper. A polycrystal can for example be represented by a packing of ellipsoids combined with simple growth [25]. These approaches generally provide microstructures of high fidelity but do not offer full control on them.…”

Section: Introductionmentioning

confidence: 99%

Optimal polyhedral description of 3D polycrystals: Method and application to statistical and synchrotron X-ray diffraction data

Quey

Renversade

2018

Computer Methods in Applied Mechanics and Engineering

194

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“…The evolution and distribution of surface strains is typically a direct output of modeling tools such as CP-FEM, and these quantities are also measurable using modern digital image correlation (DIC) methods [8,10,[12][13][14]. Both random and regular patterns can be used for DIC analysis, and for the present study a regular grid of points was milled onto the top surface of the micro-tensile samples prior to testing using the FIB-SEM.…”

Section: Surface Strain Mappingmentioning

confidence: 99%

“…These have largely involved studies where only the surface microstructure of a mechanical test specimen has been experimentally determined and subsequently used as input for either 2D or quasi-3D simulations [5][6][7], or to approximate the 3D microstructure of a simplified material (i.e., very large grain materials where the sub-surface microstructure is assumed to be columnar) [8][9][10][11][12]. St-Pierre collected 2D electron backscatter diffraction (EBSD) scans of the surface microstructure of a tensile sample and used microstructure statistics to generate a 3D mesh of the tensile sample with the experimental surface and a realistic sub-surface virtual microstructure [13]. Musienko utilized successive electropolishing on a post-deformation tensile specimen combined with EBSD scans to determine the 3D microstructure from a small volume in a region-ofinterest near the specimen surface, which was subsequently meshed and simulated to compare to the tensile experiment [14].…”

Section: Introductionmentioning

confidence: 99%

Experimental measurement of surface strains and local lattice rotations combined with 3D microstructure reconstruction from deformed polycrystalline ensembles at the micro-scale

Shade

Groeber

Schuren

et al. 2013

Integr Mater Manuf Innov

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This article describes a new approach to characterize the deformation response of polycrystalline metals using a combination of novel micro-scale experimental methodologies. An in-situ scanning electron microscope (SEM)-based tension testing system was used to deform micro-scale polycrystalline samples to modest and moderate plastic strains. These tests included measurement of the local displacement field with nm-scale resolution at the sample surface. After testing, focused ion beam serial sectioning experiments that incorporated electron backscatter diffraction mapping were performed to characterize both the internal 3D grain structure and local lattice rotations that developed within the deformed micro-scale test samples. This combination of experiments enables the local surface displacements and internal lattice rotations to be directly correlated with the underlying 3D polycrystalline microstructure, and such information can be used to validate and guide further development of modeling and simulation methods that predict the local plastic deformation response of polycrystalline ensembles.

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3D simulations of microstructure and comparison with experimental microstructure coming from O.I.M analysis

Cited by 74 publications

References 26 publications

Micro-mechanical modelling of high cycle fatigue behaviour of metals under multiaxial loads

Micro-mechanical modelling of high cycle fatigue behaviour of metals under multiaxial loads

Optimal polyhedral description of 3D polycrystals: Method and application to statistical and synchrotron X-ray diffraction data

Experimental measurement of surface strains and local lattice rotations combined with 3D microstructure reconstruction from deformed polycrystalline ensembles at the micro-scale

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