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Atomic-scale in situ observation of lattice dislocations passing through twin boundaries
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View: Figures


Image of FIG. 1.
FIG. 1.

[(a)–(c)] A series of in situ HRTEM micrographs showing the process of an extended dislocation slipping toward a TB with increasing strain ( indicates the applied stress). The circle in each micrograph shows the same location. (d) shows a magnified HRTEM image of the extended dislocation in (c). Three Burgers circles are drawn in (d).

Image of FIG. 2.
FIG. 2.

The deformation microstructural development (a) before straining and (b) during straining. The inset in (a) is a selected area electron diffraction pattern and indicates the loading direction. Dislocations marked with 1, 2, 3, and 4 in (b) represent the dislocation configurations for producing within a thick lamella, just reaching a TB, passing through a TB, and already passed through a TB, respectively.

Image of FIG. 3.
FIG. 3.

(a), (b), and (c) show in situ HRTEM images of the dislocations 2, 3, and 4 in Fig. 2(b), respectively. TBs are highlighted by the white lines. Burgers circles are drawn in (a) and (c). (d) shows the schematic illustration of a dislocation passing through a TB.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Atomic-scale in situ observation of lattice dislocations passing through twin boundaries