Experimental and numerical determination of the intragranular work hardening in a cold rolled multicrystal

Mahmoud, Gouda M.; Bacroix, Brigitte; Ungár, Tamás; Raphanel, Jean; Chauveau, Th.

doi:10.1016/s0921-5093(97)00313-4

Cited by 11 publications

(7 citation statements)

References 8 publications

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“…Recently, Hutchinson showed as well that this particular softening mechanism responsible for enhanced recovery in cube grains in rolling was not so efficient in tension, in spite of the activation of orthogonal systems for this loading path [29]. Enhanced recovery has however been observed in transmission electron microscopy (TEM) in cubeoriented grains in copper samples deformed in tension [12], in consistence with other data obtained by X-ray Diffraction [23].…”

Section: Introductionmentioning

confidence: 57%

“…As a result, a lot of phenomenological or physically-based models have already been developed and tested on copper alloys, for example in the case of the prediction of textures [17] or more simply for the description of the macroscopic mechanical behavior (like e.g. [3,13,18]), capable of taking into account the influence of the crystallographic and morphological textures, of the grain size, grain boundary and dislocation density distributions on the macroscopic response [19][20][21][22][23][24][25]. But, in spite of the tremendous documentation already available on the subject, the issue of a predictive model, capable of reproducing the mechanical behavior of various copper alloys, associated with various textures and grain size distributions is still not closed.…”

Section: Introductionmentioning

confidence: 99%

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The influence of the cube component on the mechanical behaviour of copper polycrystalline samples in tension

et al. 2018

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Section: Introductionmentioning

confidence: 57%

Section: Introductionmentioning

confidence: 99%

The influence of the cube component on the mechanical behaviour of copper polycrystalline samples in tension

et al. 2018

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“…This approximation is often shown to be consistent with the peak broadening analysis [30,35,36]; (ii) Crystal plasticity is sometimes used to reduce the number of populated systems; this approach is most often shown to improve [11,16,37] or more rarely to deteriorate the quality of the fitting procedure (exposed below) [38]; it is sometimes completed by somewhat arbitrary assumptions on the dislocation character [11]; (iii) All possible slip systems are taken into account and assumed to be equally populated, but the character (screw, edge or mixed) is not a priori set, but deduced from a minimization process [31].…”

Section: The Influence Of the Number Of Considered Slip Systemsmentioning

confidence: 81%

The evolution with strain of the stored energy in different texture components of cold-rolled IF steel revealed by high resolution X-ray diffraction

Wauthier-Monnin

Chauveau

Castelnau

et al. 2015

Materials Characterization

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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. During the deformation of low carbon steel by cold-rolling, dislocations are created and stored in grains depending on local crystallographic orientation, deformation, and deformation gradient. Orientation dependent dislocation densities have been estimated from the broadening of X-ray diffraction lines measured on a synchrotron beamline. Different cold-rolling levels (from 30% to 95% thickness reduction) have been considered. It is shown that the present measurements are consistent with the hypothesis of the sole consideration of screw dislocations for the analysis of the data. The presented evolutions show that the dislocation density first increases within the α fiber (={hkl}b110N) and then within the γ fiber (={111}buvwN). A comparison with EBSD measurements is done and confirms that the storage of dislocations during the deformation process is orientation dependent and that this dependence is correlated to the cold-rolling level. If we assume that this dislocation density acts as a driving force during recrystallization, these observations can explain the fact that the recrystallization mechanisms are generally different after moderate or large strains.

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“…The intrinsically 3D character of plastic slip processes must be taken into account (Parisot et al, 2001;Eberl et al, 2002). This is however not enough to reach quantitative agreement with strain and lattice rotation field measurements (Mohamed et al, 1997;Bhattacharyya et al, 2001). A precise knowledge of the 3D grain morphology below the surface is necessary for a full validation or identification of the continuum model.…”

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confidence: 99%

Ensemble averaging stress–strain fields in polycrystalline aggregates with a constrained surface microstructure – Part 2: crystal plasticity

Zeghadi

Forest

Gourgues

et al. 2007

Philosophical Magazine

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The effect of three-dimensional grain morphology on the deformation at a free surface in polycrystalline aggregates is investigated by means of a large scale finite element and statistical approach. For a given 2D surface at z = 0 containing 39 grains with given crystal orientations, eight 3D random polycrystalline aggregates are constructed having different 3D grain shapes and orientations except at z = 0, based on an original 3D image analysis procedure. They are subjected to overall tensile loading conditions. The continuum crystal plasticity framework is adopted and the resulting plastic strain fields at the free surface z = 0 are analysed. Ensemble average and variance maps of the plastic strain field at the observed free surface are computed. In the case of elastoplastic copper grains, fluctuations ranging between 2% and 80% are found in the equivalent plastic slip level at a given material point of the observed surface from one realization of the microstructure to another. The obtained fields are compared to the prediction based on the associated columnar grain microstructure, often used in literature.

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Experimental and numerical determination of the intragranular work hardening in a cold rolled multicrystal

Cited by 11 publications

References 8 publications

The influence of the cube component on the mechanical behaviour of copper polycrystalline samples in tension

The influence of the cube component on the mechanical behaviour of copper polycrystalline samples in tension

The evolution with strain of the stored energy in different texture components of cold-rolled IF steel revealed by high resolution X-ray diffraction

Ensemble averaging stress–strain fields in polycrystalline aggregates with a constrained surface microstructure – Part 2: crystal plasticity

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