In-situ radiation response of additively manufactured modified Inconel 718 alloys

Aydogan, E. and El-Atwani, O. and Erdem, B. and Chen, W. Y. and Li, M. and Devaraj, A. and Koç, Bahattin and Maloy, S. A. (2022) In-situ radiation response of additively manufactured modified Inconel 718 alloys. Additive Manufacturing, 51 . ISSN 2214-8604 (Print) 2214-7810 (Online)

Full text not available from this repository. (Request a copy)


In this study, a novel alloy of modified Inconel 718 produced by laser powder bed fusion is studied before and after in-situ Kr irradiation up to 3 dpa at 200 and 450 °C. Before irradiation, the microstructure consists of dislocation cells having a misorientation angle less than 5° and with an average size of ~500 nm. There are also second phase particles of MC type carbides, Laves phase and oxides such as Y-O, Y-(Ti)-Al-O. While the microstructure consists of stacking fault tetrahedra, faulted and perfect loops after irradiation at 200 °C, dislocation loops are the primary defects at 450 °C. With increasing dose, the size of the defects remains similar at 200 °C while it increases at 450 °C. This has been attributed to the existence of vacancy type defects at 200 °C and the different defect transport mechanisms at different temperatures. Moreover, matrix and second phase particle compositions seem to be similar after irradiation. The sink strengths of the structures have been calculated and superior radiation resistance of this alloy has been attributed to the existence of fine cell boundaries stabilized by the second phase particles produced by additive manufacturing.
Item Type: Article
Uncontrolled Keywords: Cellular structure; In-situ irradiation; Laser powder bed fusion; Modified Inconel 718; Radiation induced defects
Divisions: Faculty of Engineering and Natural Sciences
Integrated Manufacturing Technologies Research and Application Center
Depositing User: Bahattin Koç
Date Deposited: 26 Aug 2022 09:03
Last Modified: 26 Aug 2022 09:03

Actions (login required)

View Item
View Item