Robust γ-TiAl Dual Microstructure Concept by Advanced Electron Beam Powder Bed Fusion Technology

Language
en
Document Type
Article
Issue Date
2023-09-05
Authors
Reith, Marcel
Franke, Martin
Körner, Carolin
Editor
Narayanan, Jinoop Arackal
Anil Kumar, V.
Paul, Christ Prakash
Publisher
MDPI
Abstract

The dual microstructure concept for gamma titanium aluminides (γ-TiAl) processed via electron beam–powder bed fusion (PBF-EB) provides a huge potential for more efficient jet turbine engines. While the concept is feasible and the mechanical properties are promising, there are still some challenges. For an industrial application, the heat treatment window has to match the conditions in industrial furnaces. This study shows how the required heat treatment window can be achieved via advanced PBF-EB technology. Through using an electron beam with 150 kV acceleration voltage, the difference in aluminum between the designed aluminum-rich and aluminum-lean regions of the part is increased. Moreover, the aluminum content within each of these regions, respectively, is more homogenous compared to the 60 kV acceleration voltage. This combination provides a heat treatment window of 25 °C, enabling the industrial application of the dual microstructure concept for γ-TiAl.

Journal Title
Crystals
Volume
13
Issue
9
Citation
Crystals 13.9 (2023). DOI:10.3390/cryst13091348
URN
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