steel research international,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 31, 2024
Herein,
the
effects
of
varying
austenitizing
times
on
microstructure
and
mechanical
properties
Cr‐Ni‐Mo‐V
series
high‐strength
steel
are
investigated,
discussing
mechanisms
that
enhance
strength
toughness.
By
controlling
duration,
during
subsequent
heat
treatments
is
improved,
leading
to
enhanced
overall
properties.
The
experimental
undergoes
at
different
times,
characterized
using
optical
microscopy,
energy‐dispersive
spectroscopy,
field
emission
scanning
electron
X‐ray
diffraction.
Mechanical
assessed
through
tensile
testing,
impact
microhardness
measurements.
results
indicate
that,
when
comparing
an
time
1
h
15
min,
ultimate
decreases
by
10%,
reduces
78.2
HV,
elongation
increases
1.39
toughness
improves
80%.
enhancement
in
primarily
attributed
synergistic
effect
tempered
martensite
bainite
within
microstructure.
Fracture
morphology
analysis
reveals
variations
affect
carbide
distribution,
accelerate
dissolution,
decrease
crack
growth
zone,
This
study
provides
valuable
insights
for
designing
steels
with
optimal
strength‐toughness
synergies.
Reactive and Functional Polymers,
Год журнала:
2024,
Номер
202, С. 106000 - 106000
Опубликована: Июнь 26, 2024
To
enhance
the
anticorrosive
performance
of
coatings
in
harsh
corrosive
environments,
a
graphene/isophorone
diisocyanate
(IPDI)
microcapsule
is
prepared
by
in-situ
polymerization.
The
self-healing
and
based
on
these
microcapsules
are
studied.
with
cross-linked
shells
this
study
solves
problems
excessive
size
insufficient
strength
traditional
microcapsules.
addition
improves
coatings.
shape
form
round
balls,
average
particle
thickness
range
17–23
μm
0.5–3.4
μm,
which
conducive
to
preparation
20.64
MPa
wrap-around
rate
reaches
68%.
have
an
initial
evaporation
temperature
231.3
°C,
graphene
organic
cross-linking
shell
enhances
thermal
stability
electrochemical
impedance
spectroscopy
(EIS)
indicates
that
|Z|f=0.01
Hz
value
coating
10
wt%
after
168
h
immersion
about
9.4
×
109
Ω
cm2,
nearly
three
orders
magnitude
higher
than
without
(6.9
106
cm2).
Monitoring
artificial
scratches
using
scanning
electron
microscope
(SEM)
for
24
reveals
repairs
cracks
well.
It
demonstrated
incorporation
graphene/IPDI
anti-corrosive
coating.
Surfaces and Interfaces,
Год журнала:
2024,
Номер
51, С. 104477 - 104477
Опубликована: Май 31, 2024
This
study
aims
to
investigate
the
mechanical
properties
changes
and
underlying
reasons
caused
by
Mn
addition
Cu6Sn5
intermetallic
compounds
(IMC).
For
this
purpose,
0.07
wt.%
doped
SnAgCu
(SAC)305/Cu
joint
were
prepared
observe
its
shear
performance
at
a
high
speed
of
1000
mm/min
after
aging
170°C
for
750
h.
The
Mn-doped
samples
exhibited
smaller
decline
aging,
in
comparison
undoped
samples.
Notably,
fracture
location
transitioned
from
interior
SAC
interface
doping.
Nanoindentation
experiments
demonstrated
significant
increase
modulus
hardness
Cu3Sn
phases.
To
gain
deeper
understanding
mechanisms
driving
IMC
properties,
first
principles
calculations
employed.
introduction
resulted
strengthened
bonding
due
hybridization
Sn
atoms
high-energy
regions,
leading
formation
charge-enriched
areas
improved
IMC.
results
obtained
both
computational
experimental
approaches
exhibit
similar
trends
these
changes.
Moreover,
integration
methods
provides
guidance
advancing
research
enhancing
our
their
behavior.
Advanced Composites and Hybrid Materials,
Год журнала:
2025,
Номер
8(1)
Опубликована: Янв. 2, 2025
Abstract
Bi
2
WO
6
/BiOCl
nanocomposites
with
three-dimensional
core–shell
structure
were
synthesized
by
a
two-step
hydrothermal
method.
The
compounds
characterized
XRD,
SEM,
TEM,
HR-TEM,
EDX,
SAED,
XPS,
PL,
UV–Vis
DRS,
photoelectrochemical,
and
photodegradation
experiments.
result
showed
that
the
catalytic
activity
of
was
significantly
better
than
BiOCl.
effect
amount
on
properties
composite
studied.
had
highest
photocatalytic
degradation
efficiency
for
TNT,
rate
reached
90%
after
180
min
visible
light
irradiation.
In
process
reaction
4.5
is
highest,
which
0.20057
−1
.
After
4
cycles,
TNT
remained
at
80%.
free
radical
trapping
experiments
holes
superoxide
anions
played
major
role
in
wastewater
/BiOCl.
Based
results
experiment,
Mott-Schottky
test,
ultraviolet–visible
diffuse
reflection
spectroscopy,
mechanism
enhancing
proposed.
Advanced Engineering Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 23, 2025
The
impact
of
nonisothermal
annealing
on
the
microstructure
and
mechanical
properties
continuously
cast
rolled
Al–Mg
alloys
is
investigated.
alloy
after
at
360,
380,
400
°C
are
compared
with
those
isothermally
annealed
samples
same
temperatures.
analysis
encompasses
quantity
size
precipitates,
dislocation
density,
microstructure,
alloy.
results
show
that
involved
in
experiments
enhances
resistance
to
softening,
significantly
stronger
alloys.
Peak
tensile
strength
(317.88
±
1.19
MPa)
peak
hardness
(81.3
HV)
observed
380
°C.
Transmission
electron
microscopy
(TEM)
identifies
primary
precipitates
as
β‐Al
3
Mg
2
,
5
Si
6
Al
(Fe
Mn).
Quantitative
reveals
promotes
formation
more
finely
dispersed
precipitates.
alloy's
enhanced
can
be
attributed
combined
effects
dispersion
strengthening,
grain
refinement,
strengthening.
This
study
holds
significant
implications
for
improving
process
