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@ARTICLE{Hecht:486709,
author = {Hecht, U. and Vayyala, A. and Barriobero Vila, Pere and
Navaeilavasani, N. and Gein, S. and Cazic, I. and Mayer, J.},
title = {{M}icrostructure evolution in the hypo-eutectic alloy
{A}l$_{0.75}${C}r{F}e{N}i$_{2.1}$ manufactured by laser
powder bed fusion and subsequent annealing},
journal = {Materials science and engineering / A},
volume = {144315},
issn = {0921-5093},
address = {Amsterdam},
publisher = {Elsevier},
reportid = {PUBDB-2022-07429},
pages = {144315},
year = {2022},
abstract = {The hypo-eutectic medium entropy alloy
Al$_{0.75}$CrFeNi$_{2.1}$ was processed by laser powder bed
fusion (LPBF). The off-equilibrium solidification conditions
prohibited coupled eutectic growth. Instead, the primary
face centered cubic phase A1(FCC) solidified with a cellular
morphology and the body centered, initially ordered B2(BCC)
phase formed as a thin intercellular envelope. During
post-build annealing an ultrafine quasi-lamellar pattern
evolved following BCC growth and coarsening. The novel solid
state transformation from cellular to lamellar morphology
was attributed to a pronounced anisotropy of the FCC|BCC
phase boundary energy. Microstructure evolution was also
studied during continuous heating using in situ high-energy
synchrotron X-ray diffraction (HEXRD) carried out at the
beamline P07-HEMS of PETRA III (German Electron Synchrotron,
DESY). The ultrafine and nano-scale features of the
microstructure were quantitatively analyzed by atom probe
tomography (APT) in the as-built condition and after
isothermal annealing at 950 °C. The benefits of LPBF
processing were discussed on the basis of mechanical
properties measured by 3-point bending. The estimated
tensile properties after annealing at 950 °C/6 h
reached YS ≈ 860 MPa, UTS ≈1384 MPa with an
elongation at fracture of ≈11\%. Tensile properties in the
as-built condition were comparable to martensitic steels.},
cin = {DOOR ; HAS-User},
ddc = {530},
cid = {I:(DE-H253)HAS-User-20120731},
pnm = {6G3 - PETRA III (DESY) (POF4-6G3) / FS-Proposal: I-20210694
(I-20210694)},
pid = {G:(DE-HGF)POF4-6G3 / G:(DE-H253)I-20210694},
experiment = {EXP:(DE-H253)P-P07-20150101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000905143500001},
doi = {10.1016/j.msea.2022.144315},
url = {https://bib-pubdb1.desy.de/record/486709},
}