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In Situ Macroscopic Tensile Testing in SEM and Electron Channeling Contrast Imaging: Pencil Glide Evidenced in a Bulk β-Ti21S Polycrystal

1
Université de Lorraine–CNRS–Arts et Métiers ParisTech–LEM3, 7 rue Félix Savart, 57070 Metz, France
2
Labex Damas–Université de Lorraine, 57073 Metz, France
*
Authors to whom correspondence should be addressed.
Materials 2019, 12(15), 2479; https://doi.org/10.3390/ma12152479
Received: 27 June 2019 / Revised: 25 July 2019 / Accepted: 2 August 2019 / Published: 4 August 2019
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Abstract

In this paper, we report the successful combination of macroscopic uniaxial tensile testing of bulk specimen combined with In situ dislocation-scale observations of the evolution of deformation microstructures during loading at several stress states. The dislocation-scale observations were performed by Accurate Electron Channeling Contrast Imaging in order to follow the defects evolution and their interactions with grain boundaries for several regions of interest during macroscopic loading. With this novel in situ procedure, the slip systems governing the deformation in polycrystalline bulk β-Ti21S are tracked during the macroscopic uniaxial tensile test. For instance, curved slip lines that are associated with “pencil glide” phenomenon and tangled dislocation networks are evidenced. View Full-Text
Keywords: in situ; tensile test; plastic deformation; SEM; A-ECCI; slip-system; dislocation; BCC titanium in situ; tensile test; plastic deformation; SEM; A-ECCI; slip-system; dislocation; BCC titanium
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Ben Haj Slama, M.; Maloufi, N.; Guyon, J.; Bahi, S.; Weiss, L.; Guitton, A. In Situ Macroscopic Tensile Testing in SEM and Electron Channeling Contrast Imaging: Pencil Glide Evidenced in a Bulk β-Ti21S Polycrystal. Materials 2019, 12, 2479.

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