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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Mangler, Clemens
University of Vienna
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (15/15 displayed)
- 2024Grain-Size-Dependent Plastic Behavior in Bulk Nanocrystalline FeAl
- 2023Interface effects on titanium growth on graphenecitations
- 2023Creation of Single Vacancies in hBN with Electron Irradiationcitations
- 2021The morphology of doubly-clamped graphene nanoribbons
- 2014Nitrogen controlled iron catalyst phase during carbon nanotube growthcitations
- 2012Radiation effects in bulk nanocrystalline FeAl alloycitations
- 2012Spinodal decomposition in (CaxBa1-x)(y)Fe4Sb12citations
- 2011Growth of nanosized chemically ordered domains in intermetallic FeAl made nanocrystalline by severe plastic deformationcitations
- 2011Three-Dimensional Analysis by Electron Diffraction Methods of Nanocrystalline Materialscitations
- 2011Thermally induced transition from a ferromagnetic to a paramagnetic state in nanocrystalline FeAl processed by high-pressure torsioncitations
- 2010Electron microscopy of severely deformed L12 intermetallicscitations
- 2010Quantitative local profile analysis of nanomaterials by electron diffractioncitations
- 2010Structural modifications during heating of bulk nanocrystalline FeAl produced by high-pressure torsioncitations
- 2008TEM study of local disordering: a structural phase change induced by high-pressure torsioncitations
- 2004Nanostructures in L12-ordered Cu3Au processed by torsion under high pressurecitations
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article
TEM study of local disordering: a structural phase change induced by high-pressure torsion
Abstract
Long-range ordered intermetallic alloys with L12 (Ni3Al, Cu3Au) and B2 (FeAl) structures were deformed by high-pressure torsion at room temperature up to high grades of deformation. Transmission electron microscopy shows that disordering caused by the deformation occurs on a very local scale within coarse grains along glide planes (Cu3Au, Ni3Al) and in the form of well defined local regions (Ni3Al, FeAl). The latter leads to a duplex structure consisting of an ordered coarse-grained structure and a disordered nanocrystalline structure. The different mechanisms that can lead to disordering during severe plastic deformation are discussed on the basis of the different ordering energies and on the basis of antiphase boundaries associated with gliding dislocations. The results indicate that in intermetallic alloys the formation of a nanocrystalline structure by severe plastic deformation is facilitated by the loss of order.