A theoretical investigation of the influence of dislocation sheets on evolution of yield surfaces in single-phase B.C.C. polycrystals

Peeters, Bart; Kalidindi, Surya R.; Teodosiu, Cristian; Houtte, Paul Van; Aernoudt, Etienne

doi:10.1016/s0022-5096(01)00094-1

Cited by 73 publications

(55 citation statements)

References 40 publications

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“…the fact that when dislocation boundaries are formed during plastic strain, the dislocations of a certain sign can be stopped on one side of the boundary and those of opposite sign on the other side of the boundary. This polarity may give rise to an asymmetry of the slip resistance [28]. We can thus probably anticipate that, in the present case, the investigated microstructures (measured at the level of one texture component) are not strongly polarized.…”

Section: Typical High Resolution Xrd Datamentioning

confidence: 68%

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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Section: Typical High Resolution Xrd Datamentioning

confidence: 68%

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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“…Constitutive models are explained at the microscopic level and the macroscopic level. The microscopic model shows a high level of accuracy in relation to the phase transformation and dislocation mechanics but are limited in their use, due to complex experimental procedures needed in obtaining information about material parameters [14,15] while macroscopic models provide good compromise between model accuracy and simulation computational time and therefore are widely used [16]. Isotropic models, Kinematic models and a combination of both isotropic and kinematic models are three types of hardening models.…”

Section: Introductionmentioning

confidence: 99%

Using the Hollomon Model to Predict Strain-Hardening in Metals

Nutor¹,

Adomako²,

Fang³

2017

AJMSP

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Stress -strain values obtained from tensile tests of aluminium and steel is used to evaluate the true stress -true strain values. The Hollomon's model is then used to predict the strain-hardening behavior in the two specimens. It is clearly seen that the strain-hardening behavior in metals can be described using the Hollomon's model. However, we have assumed that the onset of strain-hardening is at the yield point up until the ultimate tensile strength. The correlation between the experimental true stress -true strain values of aluminium and the calculated values using the Hollomon equation is much better than that of steel.

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“…In [27] a crystal-plasticity based model which introduces three different dislocation densities on the glide system level was applied to model the deformation behavior of interstitial free steel subjected to shear followed by reversed shear and tension-followed by shear loading. Based upon this model Holmedal et al [12] developed a model which introduces a phenomenological hardening law on the glide system level in order to account for the deformation behavior of a 3000 series aluminum alloy.…”

Section: Introductionmentioning

confidence: 99%

Phenomenological modeling of anisotropy induced by evolution of the dislocation structure on the macroscopic and microscopic scale

et al. 2011

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This work focuses on the modeling of the evolution of anisotropy induced by the development of the dislocation microstructure. A model formulated at the engineering scale in the context of classical metal plasticity and a model formulated in the context of crystal plasticity are presented. Images obtained by transmission-electron microscopy (TEM) show the influence of the strain path on the evolution of anisotropy for the case of two common materials used in sheet metal forming, DC06 and AA6016-T4. Both models are capable of accounting for the transient behavior observed after changes in loading path for fcc and bcc metals. The evolution of the internal variables of the models is correlated with the evolution of the dislocation structure observed by TEM investigations.

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A theoretical investigation of the influence of dislocation sheets on evolution of yield surfaces in single-phase B.C.C. polycrystals

Cited by 73 publications

References 40 publications

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

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

Using the Hollomon Model to Predict Strain-Hardening in Metals

Phenomenological modeling of anisotropy induced by evolution of the dislocation structure on the macroscopic and microscopic scale

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