2021
DOI: 10.1016/j.mtla.2020.100996
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Electron channeling contrast imaging characterization and crystal plasticity modelling of dislocation activity in Ti21S BCC material

Abstract: In this paper, an original approach is proposed to compare modeling and relevant statistical experiments using -Ti21S Body Centered Cubic (BCC) metal as a challenging benchmark. Our procedure allows the evolution of microstructural defects to be tracked in situ with excellent spatial resolution, while observing a bulk sample region sufficiently large to be statistically representative of the material. We identify multiple mechanisms such as slip transfer, slip traces, pencil glide, etc. We demonstrate that for… Show more

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Cited by 5 publications
(3 citation statements)
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References 54 publications
(52 reference statements)
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“…This might explain why the maximum Schmid factor is sometimes reported to show no influence on strain heterogeneities, when the strain accumulation stage is not differentiated from the build-up of the plastic deformation pattern. On the opposite, the Schmid law was reported to be statistically satisfied at very low plastic strains [55]. This scale of investigation allows for a hint at how the plastic deformation pattern is built-up around the macroscopic yielding.…”
Section: Grain-scale Investigation Of Strain Heterogeneities and Loca...mentioning
confidence: 95%
See 1 more Smart Citation
“…This might explain why the maximum Schmid factor is sometimes reported to show no influence on strain heterogeneities, when the strain accumulation stage is not differentiated from the build-up of the plastic deformation pattern. On the opposite, the Schmid law was reported to be statistically satisfied at very low plastic strains [55]. This scale of investigation allows for a hint at how the plastic deformation pattern is built-up around the macroscopic yielding.…”
Section: Grain-scale Investigation Of Strain Heterogeneities and Loca...mentioning
confidence: 95%
“…For a given slip mark, the angle between the mark and the loading direction (horizontal axis) is measured. With knowledge of the crystallographic orientation of the grain where the mark lies, the measured angle can be compared to the theoretical angles associated to each of the 48 slip systems among <111>{110}, <111>{112} and <111>{123} [55]. The computation of the theoretical angles is detailed in appendix A.…”
Section: Characterization Of the Deformed Surfacementioning
confidence: 99%
“…An optimized procedure referred as Accurate Electron Channeling Contrast Imaging (A-ECCI), and based on the precise control of the channeling conditions taking advantage of the 0.1° angular resolution of High Resolution Selected Area Channeling Patterns with an improved spatial resolution of 500nm was developed some years ago [27], [28], [30], [31]. A-ECCI thus enables the comprehensive characterization of defects such as stacking faults or dislocations, and can be used in conjunction with in situ tensile test inside the SEM [32], [33]. This technique provides access to multiple regions of interest; from sample scale to dislocation scale; with one unique tool while loading a bulk sample, thus providing access to large datasets amenable to the application of data mining procedures.…”
Section: Introductionmentioning
confidence: 99%