Microstructure and texture evolution in a twinning-induced-plasticity steel during uniaxial tension

Saleh, Ahmed A.; Pereloma, Elena V.; Gazder, Azdiar A.

doi:10.1016/j.actamat.2013.01.051

Cited by 95 publications

(63 citation statements)

References 51 publications

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“…16 This is in agreement with the limited twinning (no value given) observed after cyclic fatigue experiments on TWIP steel [47]. The above limited twin volume fraction is also close to our ViscoPlastic Self-Consistent model prediction of ~6% (at 18% tensile strain) following the simulation of the monotonic tensile loading of the same TWIP steel [32].…”

Section: The Modified Epsc Model Predictionssupporting

confidence: 75%

“…In fact, the volume effect of twinning in fcc polycrystals is generally limited even at higher strains [31,32]. Alternatively, the stress relaxation effect is achieved via the so called "finite initial fraction" approach; wherein the twin is assumed to grow to a fixed volume fraction of its parent grain at the nucleation stage.…”

Section: Elasto-plastic Self-consistent Modellingmentioning

confidence: 99%

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On the evolution and modelling of lattice strains during the cyclic loading of TWIP steel

et al. 2013

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The evolution of lattice strains in fully annealed Fe-24Mn-3Al-2Si-1Ni-0.06C twinning-induced plasticity (TWIP) steel is investigated via in situ neutron diffraction during cyclic (tension-compression) loading between strain limits of ±1%. The pronounced Bauschinger effect observed upon load reversal is accounted for by a combination of the intergranular residual stresses and the intragranular sources of back stress, such as dislocation pile-ups at the intersection of stacking faults. The recently modified elasto-plastic self-consistent (EPSC) model which empirically accounts for both intergranular and intragranular back stresses has been successfully used to simulate the macroscopic stress-strain response and the evolution of the lattice strains. The EPSC model captures the experimentally observed tension-compression asymmetry as it accounts for the directionality of twinning as well as Schmid factor considerations. For the strain limits used in this study, the EPSC model also predicts that the lower flow stress on reverse shear loading reported in earlier Bauschinger-type experiments on TWIP steel is a geometrical or loading path effect. AbstractThe evolution of lattice strains in fully annealed Fe-24Mn-3Al-2Si-1Ni-0.06C TWinning Induced Plasticity (TWIP) steel is investigated via in-situ neutron diffraction during cyclic (tensioncompression) loading between strain limits of ±1%. The pronounced Bauschinger effect observed upon load reversal is accounted for by a combination of the intergranular residual stresses and the intragranular sources of back stress such as dislocation pile-ups at the intersection of stacking faults.The recently modified Elasto-Plastic Self-Consistent (EPSC) model which empirically accounts for both intergranular and intragranular back stresses has been successfully used to simulate the macroscopic stress-strain response and the evolution of the lattice strains. The EPSC model captures the experimentally observed tension-compression asymmetry as it accounts for the directionality of twinning as well as Schmid factor considerations. For the strain limits used in this study, the EPSC model also predicts that the lower flow stress on reverse shear loading reported in earlier Bauschinger-type experiments on TWIP steel is a geometrical or loading path effect.

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Section: The Modified Epsc Model Predictionssupporting

confidence: 75%

Section: Elasto-plastic Self-consistent Modellingmentioning

confidence: 99%

On the evolution and modelling of lattice strains during the cyclic loading of TWIP steel

et al. 2013

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“…4 and 5) as follows. At 0% strain (fully recrystallised condition), the texture is weak (T = 1.14-1.17) and comprises an α-fibre (extending from Goss ({110}〈001〉) to Rotated Goss ({011}〈011〉) through Brass ({110}〈112〉) as well as Cube ({001}〈100〉, Copper ({112}〈111〉) and S ({123}〈634〉) orientations; all of which were carried over from prior cold rolling [15]. Typical of fcc materials, uniaxial tension resulted in the development of the characteristic 〈111〉 and 〈100〉 double fibre texture parallel to the tensile loading axis.…”

Section: Resultsmentioning

confidence: 99%

Correcting intensity loss errors in the absence of texture-free reference samples during pole figure measurement

Saleh

Gazder

2016

Materials Characterization

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Even with the use of X-ray polycapillary lenses, sample tilting during pole figure measurement results in a decrease in the recorded X-ray intensity. The magnitude of this error is affected by the sample size and/or the finite detector size. These errors can be typically corrected by measuring the intensity loss as a function of the tilt angle using a texture-free reference sample (ideally made of the same alloy as the investigated material). Since texture-free reference samples are not readily available for all alloys, the present study employs an empirical procedure to estimate the correction curve for a particular experimental configuration. It involves the use of real texture-free reference samples that pre-exist in any X-ray diffraction laboratory to first establish the empirical correlations between X-ray intensity, sample tilt and their Bragg angles and thereafter generate correction curves for any Bragg angle. It will be shown that the empirically corrected textures are in very good agreement with the experimentally corrected ones. AbstractEven with the use of X-ray polycapillary lenses, sample tilting during pole figure measurement results in a decrease in the recorded X-ray intensity. The magnitude of this error is affected by the sample size and/or the finite detector size. These errors can be typically corrected by measuring the intensity loss as a function of the tilt angle using a texture-free reference sample (ideally made of the same alloy as the investigated material). Since texture-free reference samples are not readily available for all alloys, the present study employs an empirical procedure to estimate the correction curve for a particular experimental configuration. It involves the use of real texture-free reference samples that pre-exist in any X-ray diffraction laboratory to first establish the empirical correlations between X-ray intensity, sample tilt and their Bragg angles and thereafter generate correction curves for any Bragg angle. It will be shown that the empirically corrected textures are in very good agreement with the experimentally corrected ones.

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“…To make this easy, Fig. 8 schematically provides the ideal fibres, including some important texture components, in cubic materials and their positions of ODF distribution for selected sections of fixed ϕ 2 angles [15,34]. The Euler angles and Miller indices corresponding to these common texture components are listed in Table 1.…”

Section: Orientation Distributions Of Magnetite With Various Grain Sizesmentioning

confidence: 99%

Dependence of texture development on the grain size of tertiary oxide scales formed on a microalloyed steel

Jiang

Zhao

et al. 2015

Surface and Coatings Technology

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Q. (2015). Dependence of texture development on the grain size of tertiary oxide scales formed on a microalloyed steel. Surface and Coatings Technology, Dependence of texture development on the grain size of tertiary oxide scales formed on a microalloyed steel AbstractBoth orientational and geometrical characteristics of grains in tertiary oxide scales have been quantitatively investigated using the electron backscatter diffraction (EBSD) technique. Phase and orientation mappings demonstrate that the {001} planes of magnetite and the {0001} planes of hematite are parallel to the direction of oxide growth. Pole figures (PFs) as scattering plots clearly display the direct correlation between the orientations and microstructure sites of magnetite grains. Magnetite grains develop a strong rotated cube texture component that shifts to the {100} component, whereas those with the grain size of 1-5. μm develop the {001} cube texture component. The refined magnetite grains surrounding the abnormal ones can be a combined process, including magnetite pro-eutectoid during hot rolling and cooling and re-oxidation during air-cooling. Our findings offer insights toward further understanding of the link between the geometrical and orientation parameters of grains with respect to the deformation behaviour of oxide scales formed at elevated temperatures.

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Microstructure and texture evolution in a twinning-induced-plasticity steel during uniaxial tension

Cited by 95 publications

References 51 publications

On the evolution and modelling of lattice strains during the cyclic loading of TWIP steel

On the evolution and modelling of lattice strains during the cyclic loading of TWIP steel

Correcting intensity loss errors in the absence of texture-free reference samples during pole figure measurement

Dependence of texture development on the grain size of tertiary oxide scales formed on a microalloyed steel

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