People | Locations | Statistics |
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Ferrari, A. |
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Schimpf, Christian |
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Dunser, M. |
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Thomas, Eric |
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Gecse, Zoltan |
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Tsrunchev, Peter |
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Della Ricca, Giuseppe |
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Cios, Grzegorz |
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Hohlmann, Marcus |
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Dudarev, A. |
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Mascagna, V. |
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Santimaria, Marco |
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Poudyal, Nabin |
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Piozzi, Antonella |
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Mørtsell, Eva Anne |
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Jin, S. |
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Noel, Cédric |
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Fino, Paolo |
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Mailley, Pascal |
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Meyer, Ernst |
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Zhang, Qi |
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Pfattner, Raphael | Brussels |
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Kooi, Bart J. |
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Babuji, Adara |
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Pauporte, Thierry |
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Guitton, Antoine
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (14/14 displayed)
- 2023Improving embrittlement in the Ti-Al-C MAX phase system: a composite approach for surface severe plastic deformationcitations
- 2023The effect of prior ultrasonic shot peening treatment on the low-temperature plasma nitriding of a metastable β-Ti alloy
- 2022Feature engineering-based approach for capturing fundamental deformation mechanisms of plasticity in β-Ti21S
- 2022Feature extraction applied to slip trace analysis in β-Ti21S
- 2022Microstructural and mechanical characterizations of Mg-based nanocomposites with MAX phases or MXenes after severe plastic deformation treatments
- 2022Experimental, mesoscopic and statistical approaches of plasticity in polycrystals ; Experimental, mesoscopic and statistical approaches of plasticity in polycrystals: Approches expérimentales, mésoscopiques et statistiques de la plasticité dans les polycristaux
- 2022Are MAX phases good candidates for doping Mg hydrogen storage?
- 2021Frank partial dislocation in Ti2AlC-MAX phase induced by matrix-Cu diffusion
- 2020Experimental study of elementary deformation mechanisms around a low-angle grain boundary in a single crystalline CrCoNi medium-entropy alloy.
- 2018Dislocation-scale characterization of the evolution of deformation microstructures on bulk materials. Case of TiAl alloys
- 2018Characterization of crystalline defects studied by STEM-in-SEM
- 2018A dislocation-scale characterization of the evolution of deformation microstructures around nanoindentation imprints in a TiAl
- 2018A dislocation-scale characterization of the evolution of deformation microstructures on a bulk TiAl alloy
- 2016Grain size determination in nanocrystalline materials using the TKD technique
Places of action
conferencepaper
Dislocation-scale characterization of the evolution of deformation microstructures on bulk materials. Case of TiAl alloys
Abstract
International audience ; Developing new materials and understanding how they deform is the main challenge of engineers in order to follow and predict the fast evolutions of our society. For instance, in a framework of energetic cost reductions, titanium aluminide (TiAl) alloys have attracted considerable attention due to their unique combination of properties such as high specific strength and stiffness, good creep properties and resistance against oxidation and corrosion, which make them suitable candidate materials for high temperature applications [1]. However, TiAl alloys are brittle at Room Temperature (RT), i.e. below their brittle-to-ductile transition temperature, which lies between 800°C and 1000°C [2]. Furthermore, their complex microstructures (multiphase, different types of microstructures, specific dislocation mechanisms…) with several impacts at different scales are puzzling the materials science community. Despite intense research, literature suffers from a lack of understanding of their elementary deformation mechanisms and the precise role of microstructures [2]. In order to address these questions, we report here, an original and an innovative approach bringing the necessary information, thus allowing linking the multiscale aspects of the mechanical behavior of TiAl alloys at RT. Particularly, we bring new breakthrough on the evolution of deformation microstructures at RT in the vicinity of interfaces in γ phase of a dual-phase bulk TiAl alloy. Plastic deformation is induced locally by µN-nanoindentation. The evolution of the microstructures is characterized comprehensively by accurate Electron Channeling Contrast Imaging (aECCI) before and after deformation [3]. aECCI is a non-destructive groundbreaking procedure offering the ability to provide, inside a SEM, TEM-like diffraction contrast imaging of sub-surface defects (at a depth of about one hundred of nanometers) on centimetric bulk specimen with still unsurpassed resolutions [4]. Defects, such as dislocations, can be characterized by ...