Tribomechanical, and microstructural morphological analysis of nitride ferrous powder metallurgy composites for enhanced automotive valve guide performance
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.
Язык: Английский
Effect of tool tilt angles on the formation of YSZ/Al2O3 hybrid surface composites on friction stir processed magnesium alloy AZ31
Materials Testing,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 11, 2025
Abstract
Friction
stir
processing
(FSP)
is
a
well-known
method
for
improving
metal
alloys’
surfaces
by
producing
surface
composites
with
better
mechanical
properties.
This
study
examines
how
the
tool
tilt
angle
affects
FSP
region
generation
in
an
AZ31
magnesium
(Mg)
alloy
reinforced
yttria-stabilized
zirconia
(YSZ)
and
alumina
(Al
2
O
3
).
The
effect
of
different
angles
(T
TA
)
on
dispersion,
integration,
distribution
YSZ
Al
Mg
matrix
was
investigated.
Optical
microscopy,
scanning
electron
microscopy
(SEM),
Vickers
hardness
testing
were
used
to
extensively
evaluate
microstructural
characteristics
FSP-treated
region.
findings
show
that
T
has
major
impact
composite’s
homogeneity
uniformity,
2°
encouraging
best
possible
dispersion
YSZ/Al
enhanced
friction
stirred
hybrid
composite
(FSSHC)
exhibits
greater
137
HV
as
compared
(106
HV)
base
(73
HV).
due
Orowan
strengthening
mechanism
also
because
FSSHC
ability
withstand
load
through
inclusion
particles,
homogeneous
particles
among
recrystallized
grains
provides
reinforcement
across
Язык: Английский
Exploring the Tribo-corrosion Characteristics of Clay- and MgO-Reinforced Composites: A Comparative Study
Journal of The Institution of Engineers (India) Series D,
Год журнала:
2024,
Номер
unknown
Опубликована: Апрель 18, 2024
Язык: Английский
Strategic Coordination of Electric Vehicle Aggregation and Wind Power for Grid Stability and Traffic Optimization
Опубликована: Май 9, 2024
Язык: Английский
Synergistic approach to wear rate forecasting in AZ31/5% Yttria stabilized zirconia reinforced composite through response surface methodology-genetic algorithm integration
Proceedings of the Institution of Mechanical Engineers Part J Journal of Engineering Tribology,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 10, 2024
In
this
work,
the
wear
behavior
of
a
novel
AZ31
magnesium
alloy
reinforced
with
5%
yttria-stabilized
zirconia
(YSZ)
composite
was
evaluated
using
hybrid
Response
Surface
Methodology
(RSM)
and
Genetic
Algorithm
(GA)
approach.
The
fabricated
ultrasonic-assisted
stir
squeeze
casting
technique,
ensuring
homogeneous
distribution
spherical
YSZ
particles,
as
validated
by
scanning
electron
microscope
integrated
energy
dispersive
spectroscope.
Wear
tests
were
carried
out
according
to
ASTM
standards
pin-on-disc
(POD)
tribometer,
applied
load
(AL),
sliding
speed
(SS),
distance
(SD)
main
parameters.
An
empirical
rate
regression
model
developed
RSM/Box-behnken
design,
deployed
for
parametric
optimization,
achieving
minimal
0.0144
g/m
under
30
N,
260
rpm,
400
m.
Confirmation
performed
validate
GA
predictions.
mechanisms
observed,
showing
reduced
in
GA-optimized
samples
due
optimized
resulting
minimized
ploughing,
grooving
delamination.
This
work
highlights
efficacy
hybridized
RSM
/
performance
advanced
matrix
composites.
Язык: Английский