Zeitschrift für Naturforschung A,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 25, 2024
Abstract
This
study
investigated
the
impact
of
incorporating
a
CrFeNiTiZn
High
Entropy
Alloy
(HEA)
into
A356
aluminum
matrix
through
friction
stir
processing
(FSP)
technique.
The
HEA,
renowned
for
its
compositional
complexity
and
high-performance
potential,
was
incorporated
alloy
with
different
weight
percent
combinations
to
enhance
mechanical
tribological
characteristics.
results
revealed
refined
microstructure
characterized
by
solid
solution
phases
potential
intermetallic
compound
formation
due
HEA
addition
A356/2
%Cr2
%Fe2
%Ni2
%Ti2
%Zn
composition.
Strong
interfacial
bond
strength
also
observed
among
reinforcement
particles
number
grains
found
be
about
1820.34
(average
grain
size
is
686
µm)
processed
composite
FSP
per
square
inch
at
500
magnifications.
exhibited
improved
tensile
(35.70
%)
hardness
(63.33
after
2
alloy,
attributed
strengthening
effect
particles.
Furthermore,
wear
resistance
notably
enhanced,
likely
synergistic
effects
HEA’s
inherent
modified
microstructure.
Journal of Materials Research and Technology,
Год журнала:
2023,
Номер
27, С. 5854 - 5867
Опубликована: Ноя. 1, 2023
The
microwave
cladding
technique
for
depositing
Ni
and
10
%
B4C
coatings
on
304
stainless
steel
has
yielded
significant
advancements
in
material
properties
performance.
key
findings
of
this
study
revealed
remarkable
improvements,
including
a
43.33%
increase
hardness,
indicating
enhanced
wear
resistance
mechanical
properties.
This
improvement
was
attributed
to
the
uniform
distribution
surface,
ensuring
consistent
interfacial
layer
developed
between
SS
surface
without
cracks
porosity.
Microstructural
analysis
at
500×
magnification
unveiled
an
impressive
2233.35
grains
per
square
inch,
showcasing
refined
grain
structure
achieved
during
process.
Wear
testing
demonstrated
low
rate
0.00308
mm³/m
favorable
coefficient
friction
0.1981,
confirming
material's
suitability
applications
with
demanding
frictional
conditions.
Furthermore,
corrosion
behavior
coated
assessed,
revealing
minimal
weight
loss
only
0.42
mg
10%
sample.
presence
various
carbide
phases,
such
as
Cr2C,
Cr23C6,
Cr7BC4,
Fe5C2,
Fe23B6,
within
further
contributed
Journal of Materials Research and Technology,
Год журнала:
2023,
Номер
28, С. 4299 - 4316
Опубликована: Дек. 30, 2023
The
microstructure,
homogeneity,
and
tribo-corrosion
behavior
of
microwave-developed
Nickel
as
well
titanium
dioxide
SS-304
cladding
surfaces
are
the
primary
emphasis
this
research.
study
includes
assessing
hardness
enhancement
from
Ni
TiO2
particles
in
surface.
investigation
additionally
evaluates
surface
wear
rates,
friction
coefficients,
resistance
to
corrosion
under
tribological
conditions.
with
developed
by
microwave
energy
were
investigated
study.
microstructure
was
being
examined
validate
uniformly
homogeneous
dispersion
particles,
XRD
employed
determine
phases.
evaluated,
a
pin-on-disk
tribometer
has
assessed
behavior.
Tribo-corrosion
tested
3.5-percent
NaCl
solution.
To
enhance
cladding's
efficiency,
hybrid
heating
(MHH)
utilising
charcoal
susceptor
been
employed.
Findings
exhibited
that
analysis
showed
had
uniform
distribution
compact
microstructure.
significantly
improved
about
37.68%
due
incorporation
10%
particles.
FeNi3,
NiSi2,
Ni3C,
NiC,
Ni2Si,
FeNi,
phases
seen
on
conditions
also
evaluated
using
tribometer.
outcomes
have
decreased
rates
coefficients
compared
uncoated
substrate.
Moreover,
3.5%
rate
coefficient
measured
be
0.00412
mm3/m
0.297,
respectively.
results
indicated
enhanced
Polymers,
Год журнала:
2024,
Номер
16(2), С. 232 - 232
Опубликована: Янв. 14, 2024
Poly(lactic
acid)
(PLA),
derived
from
renewable
resources,
plays
a
significant
role
in
the
global
biodegradable
plastic
market.
However,
its
widespread
adoption
faces
challenges,
including
high
brittleness,
hydrophobicity,
limited
biodegradability,
and
higher
costs
compared
to
traditional
petroleum-based
plastics.
This
study
addresses
these
challenges
by
incorporating
thermoplastic
pineapple
stem
starch
(TPSS)
modified
natural
rubber
(MNR)
into
PLA
blends.
TPSS,
waste,
is
employed
enhance
hydrophilicity,
reduce
costs.
While
addition
of
TPSS
(10
40
wt.%)
marginally
lowered
mechanical
properties
due
poor
interfacial
interaction
with
PLA,
inclusion
MNR
(1
10
PLA/20TPSS
blend
significantly
improved
stretchability
impact
strength,
resulting
suitable
modulus
(1.3
1.7
GPa)
strength
(32
52
MPa)
for
diverse
applications.
The
presence
7
wt.%
increased
90%
neat
PLA.
ternary
exhibited
heterogeneous
morphology
enhanced
adhesion,
confirmed
microfibrils
rough
texture
on
fracture
surface.
Additionally,
downward
shift
PLA’s
glass
transition
temperature
(Tg)
5–6
°C
indicated
compatibility
between
components.
Remarkably,
blends
demonstrated
superior
water
resistance
proper
biodegradability
binary
These
findings
highlight
potential
bio-based
plastics,
such
as
MNR,
contribute
sustainable
economic
models
environmental
using
packaging
Journal of Materials Research and Technology,
Год журнала:
2024,
Номер
31, С. 6 - 25
Опубликована: Июнь 2, 2024
The
growing
challenges
of
reducing
exhaust
emissions
and
improved
fuel
economy
has
triggered
automotive
engineers
to
design
manufacture
engine
parts
with
superior
mechanical
properties
dimensional
accuracies.
Valve
guides
are
cylindrical
structures
supporting
inlet
valve
stems
during
operation.
Conventionally
made
grey
cast
iron
material,
guide
suffers
from
severe
wear
losses
leading
loss
increased
due
improper
stem
seating.
Here,
the
synthesis
a
novel
ferrous
powder
metallurgy
composite
is
presented
characteristics
have
been
studied
at
varying
loads
30
N,
40
N
50
sliding
speeds
0.5
m/s,
1
m/s
2
under
lubricated
conditions.
samples
undergone
nitriding
heat
treatment
1150
°C
improve
surface
hardness
700
Hv.
shown
negative
rates
high
capillary
action
lubricating
oil
exhibited
stable
friction
coefficient
values.
This
attributed
formation
hard
phases
Fe2N,
Fe3N,
Fe4N
Fe(Mn)3C
twinning-induced
plastic
compounds
like
(Fe24Mn)
0.08
as
evident
XRD
analysis.
morphological
analysis
worn
out
was
done
SEM
Coupled
EDS
it
showed
micro-cutting,
Ploughing,
delamination
main
phenomenon.
Mechanics of Advanced Materials and Structures,
Год журнала:
2024,
Номер
unknown, С. 1 - 13
Опубликована: Апрель 3, 2024
This
study
presents
the
investigation
of
mechanical
and
thermal
properties
additively
manufactured
novel
multilayer
composites
(MLC).
Wood
carbon-reinforced
poly-lactic
acid
were
used
as
base
materials
for
3D
printing
MLC.
The
tensile,
compressive,
flexural
strengths
developed
MLC
51.47,
70.90,
73.3
MPa,
respectively.
finite
element
simulation
values
tensile
compressive
strength
51.01
70.02
MPa
depicting
negligible
variations
0.90%
1.24%.
glass
transition
temperatures
WRP,
CFRP,
specimens
54.85
°C,
57.29
56.78
Journal of Engineered Fibers and Fabrics,
Год журнала:
2025,
Номер
20
Опубликована: Янв. 1, 2025
The
main
goals
of
this
research
are
to
identify
the
significant
input
parameters
using
supervised
machine
learning
methods
and
investigate
relationship
between
process,
structure,
properties
components
created
fused
deposition
modeling
utilizing
nylon
aramid
composite
filaments.
To
develop
an
experimental
layout
Taguchi’s
L
18
orthogonal
array,
six
different
FDM
such
as
infill
pattern,
density,
layer
thickness,
component
orientation,
print
temperature,
raster
angle
have
been
taken
into
consideration.Using
Ultimaker
printer,
rectangular
samples
were
created,
values
face
hardness,
thickness
regions,
printing
time,
weight
assessed.
ANOVA
signal
noise
ratio
method
two
techniques
that
used
find
influencing
parameter
ideal
combination
parameters.
When
comparing
thickly
layered
with
a
suitable
increase
in
time
weight,
thin-layered
shown
greater
hardness
at
both
tested
areas.
With
50.09%
contribution
30.11%
area,
is
found
be
over
hardness.Layer
important
element
contributes
81.95%
42.09%
part
respectively.
In
80:20
train-test
split,
decision
tree
approach
outperformed
k-nearest
neighbor
algorithm
for
all
four
output
responses,
classification
accuracy
ranging
from
83.33%
100%.
Infill
density
recommended
by
extremely
similarly
highly
region.
presence
surface
pores,
interior
voids,
abnormalities
confirmed
FESEM
images.
