Investigating the effect of grain interaction during plastic deformation of copper

Lienert, U.; Han, Tong Seok; Almer, Jonathan; Dawson, Paul R.; Leffers, T.; Margulies, L.; Nielsen, Søren Fæster; Poulsen, Henning Friis; Schmidt, Søren

doi:10.1016/j.actamat.2004.05.051

Cited by 47 publications

(26 citation statements)

References 14 publications

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“…Their conclusion was that grains are strongly affected by their neighbors. In related work, Lienert et al (97) measured elastic strains grain by grain in a copper polycrystal using a so-called far-field diffraction experiment on a high-energy beam-line at the Advanced Photon Source (APS). They selected grains with a AE110ae axis parallel to the loading axis and also ran polycrystal simulations with anisotropic elasticity.…”

Section: Other Testsmentioning

confidence: 99%

Polycrystal Plasticity: Comparison Between Grain - Scale Observations of Deformation and Simulations

Pokharel

Lind²,

Kanjarla³

et al. 2014

Annu. Rev. Condens. Matter Phys.

138

103

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The response of polycrystals to plastic deformation is studied at the level of variations within individual grains, and comparisons are made to theoretical calculations using crystal plasticity (CP). We provide a brief overview of CP and a review of the literature, which is dominated by surface observations. The motivating question asks how well CP represents the mesoscale behavior of large populations of dislocations (as carriers of plastic strain). The literature shows consistently that only moderate agreement is found between experiment and calculation. We supplement this with a current example of microstructure evolution in the interior of a copper sample subjected to tensile deformation. Nondestructive measurements of orientation fields were performed using the near-field highenergy X-ray diffraction microscopy (nf-HEDM) technique at the Advanced Photon Source (APS). Starting at highly ordered grains, a single two-dimensional slice of microstructure containing ∼150 grains was followed through multiple strain states, where it tracked lattice rotations and defect accumulation of up to 14% elongation. In accord with the literature, at the scale of individual grains, comparison of observations with CP models indicates reasonable qualitative agreement but significant variations between simulation and experiment are apparent. The conclusion is that in order to be able to quantify the effects of microstructure on the distributions of slip, orientation change, and damage accumulation, the empirically derived constitutive relations used in continuumscale simulations need to be improved. Equally important will be the development of large-scale simulations of polycrystals that directly model dislocations. 317Annu. Rev. Condens. Matter Phys. 2014.5:317-346. Downloaded from www.annualreviews.org by University of Texas -San Antonio on 08/26/14. For personal use only.

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Section: Other Testsmentioning

confidence: 99%

Polycrystal Plasticity: Comparison Between Grain - Scale Observations of Deformation and Simulations

Pokharel

Lind²,

Kanjarla³

et al. 2014

Annu. Rev. Condens. Matter Phys.

138

103

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“…This is due to the channel non-linear behaviour. Nevertheless, elastic strain measurements [74] and computations carried out for higher plastic strains [74,75], corresponding to generalized plasticity in the polycrystal show that the scatter of the mean grain plastic strain distribution decreases dramatically with the macroscopic strain increasing. And the computations taking into account the variable orientation of the next grain lead to negligible scatter of the GB stress field close to the channel-GB intersection.…”

Section: Effect Of Neighbour Grainsmentioning

confidence: 97%

Modelling of the effect of dislocation channel on intergranular microcrack nucleation in pre-irradiated austenitic stainless steels during low strain rate tensile loading

Evrard

Sauzay

2010

Journal of Nuclear Materials

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“…[13] Similar studies based on in situ measurement of the elastic strain tensor highlighted a measurable strain variance between individual grains, which was attributed to the neighboring grain boundary conditions. [14] Most recently, the first results have been reported for the change in strain and dislocation density with subcell formation during grain subdivision in tensile deformed copper. [15] A drawback in employing the 3DXRD technique is the increased probe size, which can be restrictive in terms of intragranular information.…”

Section: Introductionmentioning

confidence: 98%

In Situ Observation of Strain Evolution in Cp-Ti Over Multiple Length Scales

Bettles

Lynch

Stevenson

et al. 2010

Metall Mater Trans A

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The strain evolution in polycrystalline CP-Ti strip under tension was studied in situ and at two length scales using Synchrotron X-ray diffraction. To establish the bulk material behavior, experiments were performed at the Australian Synchrotron facility. Because of the relatively large grain size, discontinuous ''spotty'' Debye ring patterns were observed, and a peak fitting algorithm was developed to determine the individual spot positions with the necessary precision for strain determination. The crystallographic directional dependence of strain anisotropy during the loading cycle was determined. Strain anisotropy and yielding of individual crystallographic planes prior to the macroscopic yield point were further clarified by in situ loading experiments performed at the Advanced Light Source (ALS). The deviatoric strain accumulation and plastic response were mapped on a grain-by-grain basis. The onset of microscopic yielding in the grains was identified and correlated with the relative orientation of the grains with respect to the loading direction.

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Investigating the effect of grain interaction during plastic deformation of copper

Cited by 47 publications

References 14 publications

Polycrystal Plasticity: Comparison Between Grain - Scale Observations of Deformation and Simulations

Polycrystal Plasticity: Comparison Between Grain - Scale Observations of Deformation and Simulations

Modelling of the effect of dislocation channel on intergranular microcrack nucleation in pre-irradiated austenitic stainless steels during low strain rate tensile loading

In Situ Observation of Strain Evolution in Cp-Ti Over Multiple Length Scales

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