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

Materials
Meriem Ben Haj SlamaAntoine Guitton

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.

References

Aug 11, 2001·Physical Review Letters·A H Ngan, M Wen
Sep 10, 2010·Journal of the Mechanical Behavior of Biomedical Materials·P LaheurteE Patoor
Dec 10, 2013·Micron : the International Research and Review Journal for Microscopy·Sören KahlSten Johansson
Sep 16, 2014·Scientific Reports·Antoine GuittonChristophe Tromas
Dec 2, 2014·Ultramicroscopy·J GuyonN Maloufi

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Citations

Mar 7, 2021·Materials·Hongjiang PanXiaodan Zhang

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Software Mentioned

ECCI
COMSOL

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