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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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Oehring, Michael
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (10/10 displayed)
- 2021An in situ high-energy synchrotron x-ray diffraction study of directional solidification in binary TiAl alloyscitations
- 2019Identification of Laves phases in a Zr or Hf containing γ-γ′ Co-base superalloycitations
- 2018New insights into perovskite-Ti$_{3}$AlC precipitate splitting in a Ti-45Al-5Nb-0.75C alloy by transmission electron microscopycitations
- 2018The effect of residual stresses and strain reversal on the fracture toughness of TiAl alloyscitations
- 2017Depth resolved near-surface residual stresses in γ-based TiAl before and after high-temperature exposurecitations
- 2015The effect of tungsten content on the properties of L1(2) -hardened Co-Al-W alloyscitations
- 2015The effect of zirconium addition on sintering behaviour, microstructure and creep resistance of the powder metallurgy processed alloy Ti–45Al–5Nb–0.2B–0.2Ccitations
- 2013The Transformation Mechanism of $beta$-Phase to $omega$-Related Phases in Nb-Rich $gamma$-TiAl Alloys Studied by In Situ High-Energy X-Ray Diffractioncitations
- 2013TiAlNb-alloy with a modulated B19 containing constituent produced by powder metallurgycitations
- 2012In situ forging experiments at HARWI II with advanced TiAl alloys
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article
The effect of zirconium addition on sintering behaviour, microstructure and creep resistance of the powder metallurgy processed alloy Ti–45Al–5Nb–0.2B–0.2C
Abstract
Since the presence of retained β phase might be detrimental for the creep properties of titanium aluminides, elements that stabilize the β phase, e.g. Nb and Mo, can only be used within a limited range. In this work, additions of the neutral element Zr to the alloy Ti–45Al–5Nb–0.2B–0.2C (in at.%) through elemental powder metallurgy were investigated. A powder-metallurgical processing route has been selected for this study, as it appears attractive with respect to microstructural homogeneity and manufacturing costs of complex parts. Different alloys with Zr content varying from 1 to 5 at.% were prepared by uniaxial pressing of a mix of elemental and pre-alloyed powders together with a binder system. The mechanical properties were evaluated by hardness and compression creep tests. The results indicate that Zr significantly decreases the melting point of the base alloy, which directly influences the sintering behaviour and with increasing Zr content the optimum sintering temperature decreases. The creep resistance showed a general improvement with increasing Zr content. The Zr additions resulted in the formation of γ phase enriched with Zr at the colony boundaries, the implications of which are discussed in the paper.