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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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Fischer, Franz Dieter
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (19/19 displayed)
- 2022Strain and interface energy of ellipsoidal inclusions subjected to volumetric eigenstrains: shape factorscitations
- 2021An atomistic view on Oxygen, antisites and vacancies in the γ-TiAl phasecitations
- 2020Cycled hydrogen permeation through Armco iron – A joint experimental and modeling approachcitations
- 2020Damage tolerance of lamellar bonecitations
- 2019The creep behavior of a fully lamellar γ-TiAl based alloycitations
- 2019Unifcation of the non-linear geometric transformation theory of martensite and crystal plasticity - Application to dislocated lath martensite in steelscitations
- 2018The effect of residual stresses and strain reversal on the fracture toughness of TiAl alloyscitations
- 2016Experimental and theoretical evidence of displacive martensite in an intermetallic Mo-containing $gamma$-TiAl based alloycitations
- 2011Bioinspired Design Criteria for Damage-Resistant Materials with Periodically Varying Microstructurecitations
- 2010A kinetic model of the transformation of a micropatterned amorphous precursor into a porous single crystalcitations
- 2005Martensitic phase transformations of bulk nanocrystalline NiTi alloys
- 2003Effect of back stress evolution due to martensitic transformation on iso-volume fraction lines in a Cr-Ni-Mo-Al-Ti maraging steelcitations
- 2002Back stress evolution and iso-volume fraction lines in a Cr-Ni-Mo-Al-Ti maraging steel in the process of martensitic transformationcitations
- 2002Theory, experiments and numerical modelling of phase transformations with emphasis on TRIP
- 2001Upsetting of cylinders: A comparison of two different damage indicatorscitations
- 2001Mechanical properties of a Cr-Ni-Mo-Al-Ti maraging steel in the process of martensitic transformationcitations
- 2000New view on transformation induced plasticity (TRIP)citations
- 2000The role of backstress in phase transforming steels
- 2000Deformation behavior of elastic-plastic materials containing instantly transforming inclusions
Places of action
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article
An atomistic view on Oxygen, antisites and vacancies in the γ-TiAl phase
Abstract
<p>The ordered intermetallic γ-TiAl phase plays an important role in determining mechanical properties of engineering γ-TiAl based alloys. During alloy production, interstitial O is introduced in these alloys and in the γ-phase in particular. It is anticipated that it can have a significant impact on mechanical properties of the alloys due to localized dislocation pinning at O atoms and other point defects. In this paper, we apply a standard thermodynamic approach concerning point-defects in ordered compounds together with density functional theory and finite element method calculations to investigate the impact of O on thermal point defect formation and the associated defect formation eigenstrains in the practically relevant Ti-rich off-stoichiometric γ-TiAl phase. The results show that O is strongly bound to vacancies and Ti antisite defects and may substantially increase their equilibrium concentration. Calculated concentrations and eigenstrain values of antisites and vacancies in the presence of O offer a possibility of their interaction with dislocations, promoting dislocations pinning within the strain aging temperature regime of TiAl alloys.</p>