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@ARTICLE{CiprianoFarias:645115,
author = {Cipriano Farias, Francisco Werley and Duarte, Valdemar
Rebelo and da Cruz Payão Filho, João and Schell, Norbert
and Maawad, Emad and Cormier, Jonathan and da Fonseca, Fabio
Machado Alves and Ramirez, Antonio J. and dos Santos, Telmo
Jorge Gomes and Oliveira, J. P.},
title = {{I}nconel 718 fabricated via arc-based directed energy
deposition assisted with in situ interlayer hot forging},
journal = {Materials science $\&$ engineering / A},
volume = {948},
issn = {0921-5093},
address = {Amsterdam},
publisher = {Elsevier},
reportid = {PUBDB-2026-00610},
pages = {149269},
year = {2025},
abstract = {Ni-based superalloys fabricated by arc-based directed
energy deposition (DED) typically exhibit a
non-optimizedmicrostructure, characterized by coarse and
oriented columnar grains, which limits their performance and
in-dustrial applications. In this context, microstructure
refinement techniques previously applied to arc-basedwelding
have been tested in additive manufacturing, highlighting
interlayer mechanical deformation methods(e.g., rolling and
peening). The present work describes the grain size
refinement mechanism of in situ interlayerhot forging (HF)
and evaluates its effect on the elevated-temperature tensile
behavior of Inconel 718 fabricatedvia DED (IN718 DED). HF
induced a dynamically recrystallized zone (~1 mm) on the top
layer surface and adeformed zone (~0.5 mm) immediately
beneath it, which was not completely remelted by the
subsequent layerdeposition, thereby generating
recrystallized grains during subsequent multiple thermal
cycles. During the ho-mogenization heat treatment, the
remaining deformed region recrystallized, generating a finer
grain size and analmost equiaxed microstructure. HF also
improves the yield strength at elevated-temperatures and
induces analmost isotropic behavior. For the first time,
enabling the IN718 DED to meet the grain size, elongation,
andelevated-temperature yield strength requirements (AMS
5662).},
cin = {DOOR ; HAS-User / Hereon},
ddc = {530},
cid = {I:(DE-H253)HAS-User-20120731 / I:(DE-H253)Hereon-20210428},
pnm = {6G3 - PETRA III (DESY) (POF4-6G3) / FS-Proposal: I-20210986
EC (I-20210986-EC) / CALIPSOplus - Convenient Access to
Light Sources Open to Innovation, Science and to the World
(730872)},
pid = {G:(DE-HGF)POF4-6G3 / G:(DE-H253)I-20210986-EC /
G:(EU-Grant)730872},
experiment = {EXP:(DE-H253)P-P07-20150101},
typ = {PUB:(DE-HGF)16},
doi = {10.1016/j.msea.2025.149269},
url = {https://bib-pubdb1.desy.de/record/645115},
}