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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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Völker, B.
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Topics
Publications (6/6 displayed)
- 2020Mechanical and optical degradation of flexible optical solar reflectors during simulated low earth orbit thermal cyclingcitations
- 2019Influence of annealing on microstructure and mechanical properties of ultrafine-grained Ti45Nbcitations
- 2018Thermodynamic instability of a nanocrystalline, single-phase TiZrNbHfTa alloy and its impact on the mechanical propertiescitations
- 2017Crack path identification in a nanostructured pearlitic steel using atom probe tomographycitations
- 2017Influence of testing orientation on mechanical properties of Ti45Nb deformed by high pressure torsioncitations
- 2005Spatial light modulators with monocrystalline silicon micromirrors made by wafer bondingcitations
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article
Influence of annealing on microstructure and mechanical properties of ultrafine-grained Ti45Nb
Abstract
Beta-Ti alloys have been intensively investigated in the last years because of their favorable low Young's moduli,biocompatibility and bio-inertness, making these alloys interesting candidates for implant materials. Due to theirlow mechanical strength, efforts are currently devoted to increasing it. A promising way to improve the strengthis to tailor the microstructure using severe plastic deformation (SPD). In this investigation high pressure torsionwas used to refine the microstructure of a Ti-45wt.%Nb alloy inducing a grain size of ~50 nm. The main focus ofthe subsequent investigations was devoted to the thermal stability of the microstructure. Isochronal heat-treatments performed for 30 min in a temperature range up to 500 °C caused an increase of hardness with apeak value at 300 °C before the hardness decreased at higher temperatures. Simultaneously, a distincttemperature-dependent variation of the Young's modulus was also measured. Tensile tests revealed an increasein strength after annealing compared to the SPD-state. Microstructural investigations showed that annealingcauses the formation ofα-Ti. Thefindings suggest that the combination of severe plastic deformation with sub-sequent heat treatment provides a feasible way to improve the mechanical properties of SPD-deformedβ-Ti al-loys making them suitable for higher strength applications