Investigation of slip system activity in iron at room temperature by SEM and AFM in-situ tensile and compression tests of iron single crystals

Franciosi, P.; Le, Lu Tuan; Monnet, Ghiath; Kahloun, C.; Chavanne, Marie-Hélène

doi:10.1016/j.ijplas.2014.09.008

Cited by 95 publications

(45 citation statements)

References 56 publications

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“…3(a) shows three regions where the operational slip system corresponds to {1 1 0}, {1 1 2} or {1 1 2} anti-twinning (AT) families. These results from Fig.3(a) are in agreement with experimental work from Franciosi et al [75]. The envelope of maximum Schmid factor plotted in Fig.…”

Section: Uniaxial Tensile Testssupporting

confidence: 92%

Linking atomistic, kinetic Monte Carlo and crystal plasticity simulations of single‐crystal tungsten strength

et al. 2015

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Understanding and improving the mechanical properties of tungsten is a critical task for the materials fusion energy program. The plastic behavior in body‐centered cubic (bcc) metals like tungsten is governed primarily by screw dislocations on the atomic scale and by ensembles and interactions of dislocations at larger scales. Modeling this behavior requires the application of methods capable of resolving each relevant scale. At the small scale, atomistic methods are used to study single dislocation properties, while at the coarse‐scale, continuum models are used to cover the interactions between dislocations. In this work we present a multiscale model that comprises atomistic, kinetic Monte Carlo (kMC) and continuum‐level crystal plasticity (CP) calculations. The function relating dislocation velocity to applied stress and temperature is obtained from the kMC model and it is used as the main source of constitutive information into a dislocation‐based CP framework. The complete model is used to perform material point simulations of single‐crystal tungsten strength. We explore the entire crystallographic orientation space of the standard triangle. Non‐Schmid effects are inlcuded in the model by considering the twinning‐antitwinning (T/AT) asymmetry in the kMC calculations. We consider the importance of 〈111〉{110} and 〈111〉{112} slip systems in the homologous temperature range from 0.08Tm to 0.33Tm, where Tm =3680 K is the melting point in tungsten. (© 2015 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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Section: Uniaxial Tensile Testssupporting

confidence: 92%

Linking atomistic, kinetic Monte Carlo and crystal plasticity simulations of single‐crystal tungsten strength

et al. 2015

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“…[19][20][21][22] Tschopp et al 19) observed the microstructure-dependent local strain behavior during uniaxial tension in polycrystals of nickel based superalloy by in-situ SEM and also analyzed the crystallographic orientations by EBSD. They showed that the average maximum shear strain tended to increase with Schmid factor, and that the maximum shear strain near grain boundaries were large.…”

Section: Development Of Biaxial Tensile Test System For In-situ Scannmentioning

confidence: 99%

“…They showed that the average maximum shear strain tended to increase with Schmid factor, and that the maximum shear strain near grain boundaries were large. Franciosi et al 20) investigated slip system activity in iron single crystals during uniaxial tension and compression by in-situ SEM and atomic force microscope. They analyzed the development of slip lines and crystallographic rotations during the deformation.…”

Section: Development Of Biaxial Tensile Test System For In-situ Scannmentioning

confidence: 99%

Development of Biaxial Tensile Test System for <i>In-situ</i> Scanning Electron Microscope and Electron Backscatter Diffraction Analysis

et al. 2016

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“…13,17,18) However, this assumption has not been validated, 18,19) and there would rather be several reports against this assumption. For instance, Franciosi et al 20) conducted in-situ tensile and compression tests of iron single crystals and reported that CRSS for the {110} slip systems was approximately equal to that of the {112} slip systems loaded in the twinning direction and was smaller than that of the {112} slip systems loaded in the anti-twinning direction. In most cases the so-called Schmid law is utilized to model the slip activity in crystal-plasticity analyses, but it was reported that in some cases Schmid law did not hold in bcc metals, which is sometimes called nonSchmid law.…”

Section: Introductionmentioning

confidence: 99%

Crystal Plasticity Finite-element Simulation on Development of Dislocation Structures in BCC Ferritic Single Crystals

et al. 2017

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The role of {112} slip activity on the deformation of bcc ferritic single crystals with different crystallographic orientations was studied numerically using a crystal plasticity finite-element method. Peeters model [Peeters et al., Acta Mater., 49 (2001), 1607] was utilized to predict development of dislocation structures as well as work-hardening behavior. To examine the effect of the {112} slip activity in detail, the simulation was carried out using original Peeters model in which development of cell-block boundaries (CBBs) along the {112} planes was not taken into account, Peeters model in which development of CBBs along the {112} planes was taken into account (extended-1 model), and Peeters model in which {112} slip activity was not taken into consideration (extended-2 model). The predicted stress-strain curves were in qualitatively good agreement with the experimental results for all cases when the original and extended-1 models were used, whereas two-stage work hardening observed for the crystal with {100} < 011 > was not predicted when the extended-2 model was used. Concerning development of CBBs, the extended-1 and extended-2 models gave better prediction as compared to the original model. The abovementioned results suggested that the extended-1 model gave the most appropriate predictions among the models in terms of work-hardening behavior and development of CBBs, showing that it was more reasonable to take into account both {110} and {112} slip systems and development of CBBs along not only the {110} planes but also the {112} planes.KEY WORDS: ferritic single crystal; crystal plasticity finite-element method; dislocation structure; workhardening behavior; body-centered cubic metal.

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Investigation of slip system activity in iron at room temperature by SEM and AFM in-situ tensile and compression tests of iron single crystals

Cited by 95 publications

References 56 publications

Linking atomistic, kinetic Monte Carlo and crystal plasticity simulations of single‐crystal tungsten strength

Linking atomistic, kinetic Monte Carlo and crystal plasticity simulations of single‐crystal tungsten strength

Development of Biaxial Tensile Test System for <i>In-situ</i> Scanning Electron Microscope and Electron Backscatter Diffraction Analysis

Crystal Plasticity Finite-element Simulation on Development of Dislocation Structures in BCC Ferritic Single Crystals

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