Dislocation networks in gamma/gamma’-microstructures formed during selective laser melting of a Ni-base superalloy

0541480 - ÚFM 2022 RIV GB eng J - Článek v odborném periodiku
Heep, L. - Schwalbe, C. - Heinze, C. - Dlouhý, Antonín - Rae, C. M. F. - Eggeler, G.
Dislocation networks in gamma/gamma’-microstructures formed during selective laser melting of a Ni-base superalloy.
Scripta Materialia. Roč. 190, JAN (2021), s. 121-125. ISSN 1359-6462. E-ISSN 1872-8456
Grant CEP: GA MŠMT(CZ) EF16_025/0007304
Institucionální podpora: RVO:68081723
Klíčová slova: Dislocation networks * Ni-base superalloys * Merging γ’-particles * Scanning transmission electron microscopy * Anti-phase boundary energies
Obor OECD: Materials engineering
Impakt faktor: 6.302, rok: 2021
Způsob publikování: Open access
https://www.sciencedirect.com/science/article/pii/S1359646220305455?via%3Dihub

A dislocation network which formed during selective laser melting (SLM) of a Ni-base superalloy was analyzed using scanning transmission electron microscopy (STEM). This network traverses an ordered Gamma'-phase domain, in between two adjacent Gamma-solid solution regions. The Gamma’-phase region has formed when two Gamma’-phase particles have started to coalesce, trapping the dislocation network in this ordered region so that it formed two dislocation families with pairs of anti-phase boundary (APB) coupled super partial dislocations. The network features are presented and unusual features (twist character and low APB energies), not previously reported, are discussed.
Trvalý link: http://hdl.handle.net/11104/0319894