MATEC Web of Conferences,
Journal Year:
2024,
Volume and Issue:
401, P. 14002 - 14002
Published: Jan. 1, 2024
High
entropy
alloys
(HEA)
are
now
a
well-known
group
of
materials,
which
has
been
studied
intensely
in
the
past
decade.
Due
to
high
complexity
various
HEA
structures
and
wide
compositional
spectrum,
research
field
continues
with
important
discoveries
work
volume.
Numerous
articles
presented
modalities
describe
thermodynamics
atomic
arrangement
develop
specific
criteria
for
selection
compositions
predicted
solid
solution
structures.
The
next
step
towards
industrial
use
new
category
needs
be
taken
implies
necessity
implications
methods
alloy
synthesis,
as
obtained
would
closest
theoretically
assumed
equilibrium.
A
succinct
review
results
were
article.
Crystals,
Journal Year:
2024,
Volume and Issue:
14(5), P. 451 - 451
Published: May 9, 2024
High-entropy
alloys
(HEAs)
are
advanced
materials
characterized
by
their
unique
and
complex
compositions.
Characterized
a
mixture
of
five
or
more
elements
in
roughly
equal
atomic
ratios,
these
diverge
from
traditional
alloy
formulations
that
typically
focus
on
one
two
principal
elements.
This
innovation
has
paved
the
way
for
subsequent
studies
have
expanded
our
understanding
HEAs,
highlighting
role
high
mixing
entropy
stabilizing
fewer
phases
than
expected
phase
prediction
methods
like
Gibbs’s
rule.
In
this
review
article,
we
trace
evolution
discussing
synthesis,
stability,
influence
crystallographic
structures
properties.
Additionally,
highlight
strength–ductility
trade-off
HEAs
explore
strategies
to
overcome
challenge.
Moreover,
examine
diverse
applications
extreme
conditions
promise
future
advancements
science.
Applied Sciences,
Journal Year:
2024,
Volume and Issue:
14(17), P. 7576 - 7576
Published: Aug. 27, 2024
High-Entropy
Alloys
(HEAs)
represent
a
transformative
class
of
materials
characterized
by
multiple
principal
elements
and
high
configurational
entropy.
This
review
article
provides
an
in-depth
examination
their
structural
particularities,
prediction
methodologies,
synthesis
techniques.
HEAs
exhibit
unique
stability
due
to
high-entropy
effects,
severe
lattice
distortions,
slow
diffusion
processes.
Predictive
models,
including
thermodynamic
kinetic
approaches,
are
essential
for
understanding
phase
stability.
Various
methods
impact
HEA
properties,
advanced
characterization
techniques
crucial
study.
The
highlights
current
applications
future
research
directions,
emphasizing
the
potential
in
diverse
technological
fields.
Corrosion
behaviors
of
AlCrFeTi
and
AlCrFeTiMo
multi-principal
elements
coatings
in
0.5
~
1
×
10-6
wt.
%
oxygen
containing
liquid
lead
bismuth
eutectic
(LBE)
was
investigated,
static
LBE
immersion
tests
were
conducted
at
500
°C,
550
°C
600
up
to
2000
h.
Both
had
experienced
phase
transformation
from
amorphous
BCC.
Bi-layered
oxide
scales
formed
on
coating
which
consist
outer
Fe/Cr
mixed
oxides
inner
Al/Ti
oxides,
the
interior
layer
strengthened
with
temperature
raising
features
confirmed.
The
addition
Mo
improved
system
stability
elevated
but
degraded
corrosion
resistance
coating.
Underlying
mechanism
discussed.
The
corrosion
mechanism
of
FeCoNiCrCu
high
entropy
alloy
(HEA)
coatings
produced
with
different
initial
powder
particle
sizes
in
3.5%
NaCl
is
systematically
investigated.
optimal
process
parameters
for
laser
cladding
were
obtained
through
orthogonal
tests,
resulting
excellent
quality.
As
the
size
increases,
less
energy
absorbed
by
particles,
more
difficult
it
to
form
fewer
defects.
current
density
increases
while
potential
decreases.
lower
charge
transfer
resistance
represents
worse
resistance.
Corrosion
predominantly
occurs
at
defects
on
surface
coating.
Coatings
finer
have
and
therefore
better
Compositional
analysis
passivating
film
coating
reveals
that
as
decreases,
total
content
Cu
oxide
decreases
Cr
stability
continuity
passivation
film,
which
contributes
improvement
coating's
Reducing
thus
significantly
improving
HEA
coatings.
