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A new type of 0 0 1 junction observed in a (B2) Fe-Al-Ni-B alloy by TEM in situ straining

Abstract : Single crystal foils of an FeAl alloy containing Ni and B are strained at elevated temperatures in an in situ dedicated transmission electron microscope (TEM). The observed characteristic "fork-shaped" dislocation configurations are shown to be a kind of "0 0 1 junction". This junction comes from a reaction between two 1 1 1 superdislocations gliding on different {1 1 2} planes; it results in the presence of a long and sessile edge 0 0 1 dislocation along the intersection of the glide planes. Several hypothetical core structures of such a junction are proposed and their possible effects on macroscopic mechanical properties of the alloy are discussed.
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https://hal-emse.ccsd.cnrs.fr/emse-00498558
Contributor : Anna Fraczkiewicz <>
Submitted on : Wednesday, July 7, 2010 - 5:59:00 PM
Last modification on : Thursday, July 9, 2020 - 9:44:57 AM

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Anna Fraczkiewicz, Brigitte Décamps, David Colas, Olivier Calonne, François Louchet. A new type of 0 0 1 junction observed in a (B2) Fe-Al-Ni-B alloy by TEM in situ straining. Journal of Alloys and Compounds, Elsevier, 2010, 499 (2), pp.176-182. ⟨10.1016/j.jallcom.2010.03.058⟩. ⟨emse-00498558⟩

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