Formation of Al–Al2O3 core–shell nanosphere chains during electron beam melting of γ-TiAl

Shahedi Asl, M. and Janaki Ram, G.D. and et al, . (2021) Formation of Al–Al2O3 core–shell nanosphere chains during electron beam melting of γ-TiAl. Intermetallics, 136 (107261). ISSN 09669795

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Abstract

Several core–shell nanosphere chains were observed in the electron beam melted Ti–48Al–2Cr–2Nb samples. The formation mechanism of such core–shell nanospheres, induced by Al vaporization, during the electron beam melting of γ-TiAl was investigated using the HRTEM, FESEM, STEM, and XRD analyses. The solidification of TiAl/Ti3Al lamellae, in the vicinity of the Al-diminished zones, was disclosed by microstructural studies. The core and shell of the nanospheres were characterized as porous Al and α-Al2O3, respectively. Finally, the formation of core–shell nanosphere chains in the additive manufactured γ-TiAl was schematically illustrated. © 2021 Elsevier Ltd

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IITH Creators:	IITH Creators ORCiD Janaki Ram, G D https://orcid.org/0000-0002-7580-763X
Item Type:	Article
Uncontrolled Keywords:	Additive manufacturing, Core–shell nanosphere, Intermetallics, Titanium aluminide
Subjects:	Others > Metallurgy Metallurgical Engineering
Divisions:	Department of Material Science Engineering
Depositing User:	Mrs Haseena VKKM
Date Deposited:	14 Mar 2022 11:47
Last Modified:	14 Mar 2022 11:47
URI:	http://raiithold.iith.ac.in/id/eprint/9192
Publisher URL:	https://www.sciencedirect.com/science/article/pii/...
OA policy:	https://v2.sherpa.ac.uk/id/publication/16948
Related URLs:	Author

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