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:
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.
Composite Interfaces,
Год журнала:
2024,
Номер
31(10), С. 1173 - 1197
Опубликована: Март 18, 2024
The
present
study
investigated
the
effect
of
incorporating
Yttria-Stabilized
Zirconia
(YSZ)
and
copper
(Cu)
in
development
Titanium-Based
Metal
Matrix
Composites
(TMCs)
using
Friction
Stir
Processing
(FSP)
technique.
macrostructure
TMCs,
after
adding
5%
YSZ
2%
Cu,
displayed
a
defect-free,
crack-free,
porosity-free
surface,
indicating
precision
FSP
method.
Microstructure
analysis
revealed
uniform
distribution
reinforcement
particles
proper
dispersion
grains,
key
for
enhancing
mechanical
properties.
interfacial
bonding
between
titanium
was
exceptionally
strong,
devoid
cracks
porosity,
attributed
to
additive's
role.
increase
number
grains
per
square
inch
Ti/5%
YSZ/2%
Cu
composite
(1176.26
at
500×)
signified
finer
grain
structure,
contributing
remarkable
48.04%
improvement
tensile
strength
compared
pure
titanium.
strong
are
driving
forces
behind
46.34%
increased
hardness.
Additionally,
wear
resistance
improved
by
approximately
76.66%,
vital
characteristic
applications
facing
abrasive
conditions.
corrosion
testing
demonstrated
an
8.33%
enhancement
with
composite.
