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

Anna Fraczkiewicz 1, 2, * Brigitte Décamps 3 David Colas 1, 4 Olivier Calonne 1, 4 François Louchet 5
* Auteur correspondant
1 PECM-ENSMSE - Plasticité, Endommagement et Corrosion des Matériaux
2 RMT-ENSMSE - Département Rhéologie, Microstructure, Thermomécanique
3 CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse
4 R3M - Département Rhéologie, Mécanismes, Microstructures et Matériaux Modèles
5 EDGe
LGGE - Laboratoire de glaciologie et géophysique de l'environnement
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.
Keywords : Intermetallics Mechanical properties Dislocations TEM FeAl
Type de document :
Article dans une revue
Journal of Alloys and Compounds, Elsevier, 2010, 499 (2), pp.176-182. 〈10.1016/j.jallcom.2010.03.058〉
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https://hal-emse.ccsd.cnrs.fr/emse-00498558
Contributeur : Anna Fraczkiewicz <>
Soumis le : mercredi 7 juillet 2010 - 17:59:00
Dernière modification le : mardi 23 octobre 2018 - 14:36:08

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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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