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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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Wimler, David
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (6/6 displayed)
- 2021Designing advanced intermetallic titanium aluminide alloys for additive manufacturingcitations
- 2021How electron beam melting tailors the Al-sensitive microstructure and mechanical response of a novel process-adapted y-TiAl based alloycitations
- 2021Microstructure and mechanical properties of novel TiAl alloys tailored via phase and precipitate morphologycitations
- 2021An atomistic view on Oxygen, antisites and vacancies in the γ-TiAl phasecitations
- 2020Novel intermetallic-reinforced near-α Ti alloys manufactured by spark plasma sinteringcitations
- 2019Microstructural Evolution and Mechanical Properties of an Advanced γ-TiAl Based Alloy Processed by Spark Plasma Sinteringcitations
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article
Microstructure and mechanical properties of novel TiAl alloys tailored via phase and precipitate morphology
Abstract
<p>Research and development of alloys based on the intermetallic γ-TiAl phase is experiencing a renewed interest since powder metallurgical approaches provide new near-net-shape processing options. In this work, the manufacturing via spark plasma sintering was facilitated, a straightforward manufacturing technique to consolidate gas atomized pre-alloyed TiAl powder for microstructural and mechanical evaluation. Two alloys, the so-called BMBF3 alloy (Ti-47.4Al-5.6Nb-0.4W, in at.%) and the BMBF2 alloy (Ti-48.6Al-4.1Nb-0.7W-0.4Si-0.5C-0.1B, in at.%) were microstructurally designed via a heat treatment into a mechanically balanced nearly lamellar γ microstructure, i.e. γ appears in globular and lamellar morphology, as well as a creep resistant fully lamellar one. The latter exhibits high creep strength up to 850 °C, especially due to the formation of p-Ti<sub>3</sub>AlC carbides. A heat treatment study upon this fully lamellar microstructure of the C-containing alloy links carbide formation and growth kinetics to the mechanical response of the microstructure. Thus, a stabilization heat treatment at 800 °C leads to the formation of finest carbides which are homogeneously distributed and increase the strength of the microstructure due to lower dislocation mobility. The two investigated alloys can be addressed as either a ductile TiAl alloy employable up to 750 °C (BMBF3), while the BMBF2 alloy is considered useable up to 850 °C.</p>