IntechOpen eBooks,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 17, 2024
The
exponential
growth
of
electrification
and
digitization
is
massifying
the
production
use
lithium-ion
batteries,
which
eventually
will
reach
their
end
life.
recycling
these
batteries
essential
for
environmental
reasons,
but
it
also
shows
a
strong
economic
impact.
In
fact,
Li-ion
contain
critical
raw
materials
in
higher
concentrations
than
those
found
natural
resources.
Therefore,
battery
an
rapidly
expanding
sector.
process
typically
involves
shredding
step
followed
by
sieving
to
recover
“black
mass”—a
powder
rich
lithium,
cobalt,
nickel,
manganese,
depending
on
chemistry.
However,
energy
storage
device
containing
toxic
compounds
challenging,
most
crucial
part
process.
Hence,
proposal
entails
authoring
chapter
outlining
analyzing
various
technologies
recycling,
covering
advantages
disadvantages
each
from
industrial
perspective.
Materials,
Год журнала:
2024,
Номер
17(21), С. 5198 - 5198
Опубликована: Окт. 25, 2024
Ti–6Al–4V
is
the
most
commonly
used
alpha–beta
titanium
alloy,
making
it
prevalent
among
all
alloys.
The
processed
material
widely
employed
in
aerospace,
medical,
and
other
industries
requiring
moderate
strength,
a
good
strength-to-weight
ratio,
favorable
corrosion
resistance.
A
microfinishing
process
on
alloy
surface
was
conducted
using
abrasive
films
with
grain
sizes
of
30,
12,
9
μm.
Superfinishing
sequential
process,
where
finishing
operations
are
performed
tools
progressively
smaller
grains.
topography
measurements
workpiece
were
taken
after
each
operation.
experiment
direction
developing
new
smoothness
coefficient
considering
number
distribution
contact
points
so
as
to
properly
evaluate
quality
finishing.
results
showed
that
finest-grain
gave
uniform
points,
thus
offering
best
tribological
characteristics;
LF
(micron
lapping
film)
smoothest
surfaces
(Sz
=
2
µm),
while
biggest-grain
films,
such
30
FF
film),
less
effective
since
large
protrusions
formed.
This
suitable
study
explore
optimization
paths
for
superfinishing
alloys,
implications
improving
performance
longevity
components
critical
industrial
applications.
Carbon
fiber-reinforced
polymers
(CFRPs)
are
widely
used
in
the
aerospace
industry
for
weight
reduction
and
improved
energy
efficiency
owing
to
their
high
strength-to-weight
ratios.
However,
CFRP
drilling
process
component
assembly
often
leads
defects
caused
by
anisotropic
properties,
which
negatively
impact
manufacturing
increasing
waste
rates.
While
support
plate
methods
have
been
proposed
mitigate
these
defects,
previous
studies
not
adequately
addressed
current
challenges.
In
era
of
Fourth
Industrial
Revolution,
where
sustainable
carbon
neutrality
emphasized,
economic
environmental
aspects
require
further
investigation.
Particularly
drilling,
an
model
that
considers
strict
tolerance
requirements
components
essential
factors
such
as
consumption,
resource
efficiency,
production
costs
has
yet
developed.
This
study
investigates
use
foam,
rubber,
cork,
aluminum
plates
drilling.
Experimental
analyses
conducted
assess
defect-reduction
performance
evaluate
this
system
through
machining
economics
modeling.
Considering
200
holes,
using
cork
a
resulted
were
87.4%
those
incurred
when
with
alone,
making
it
most
cost-effective
condition.
result
highlights
ability
provide
both
reasonable
material
superior
defect
suppression
performance.
Moreover,
is
inherently
environmentally
friendly
recyclable,
highly
suitable
processes
within
manufacturing.
Advanced Manufacturing Polymer & Composites Science,
Год журнала:
2025,
Номер
11(1)
Опубликована: Янв. 10, 2025
Medical
implant
manufacturing
is
a
growing
sector
and
therefore
requires
improved
practices.
In
the
case
of
total
hip
arthroplasty,
most
challenging
component
to
meet
ISO
standard
(ISO
7206-2:2011)
acetabular
liner,
often
made
from
ultra-high
molecular
weight
polyethylene
(UHMWPE).
UHMWPE
machining
associated
with
several
challenges,
including
swarf
control.
This
research
used
low
frequency
vibration
(LFV),
an
intermittent
cutting
process
supercritical
CO2
(scCO2)
aid
chip
segmentation
prevent
nesting.
Machining
trials
have
demonstrated
significant
reduction
in
nesting
relative
traditional
(91%
LFV
98%
when
using
scCO2).
The
surface
roughness
(*Ra_Symbol*)
also
had
indirect
improvement
(53%
on
inner
hemisphere),
leading
all
parts
meeting
requirement
7206-2:2011.
results
machinability
benefits
for
UHMWPE,
reducing
operator
intervention
required
scrap
rates.
Metals,
Год журнала:
2025,
Номер
15(2), С. 122 - 122
Опубликована: Янв. 26, 2025
This
study
investigates
a
novel
short
electric
arc
vertical
turning
method
for
machining
titanium
alloy
shafts.
The
was
successfully
applied
to
rods,
and
its
effects
on
material
removal
rate
(MRR),
surface
roughness,
roundness,
cross-sectional
morphology
were
analyzed
at
varying
processing
voltages.
results
indicate
that
the
MRR
quality
improve
with
increased
voltage,
reaching
maximum
of
231
mm3/min
26
μm
roughness
32
V.
However,
deteriorates
higher
duty
cycles
voltages
due
unstable
discharges.
Roundness
deviations
are
minimized
rotational
speeds,
which
enhance
uniform
stability.
Metallographic
analysis
revealed
an
heat-affected
zone
recast
layer
thickness
demonstrates
high
efficiency
improved
quality,
making
it
suitable
shaft
manufacturing
in
advanced
engineering
applications.
Proceedings of the Institution of Mechanical Engineers Part C Journal of Mechanical Engineering Science,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 5, 2025
Machining
magnesium
alloys
using
traditional
methods
pose
several
challenges
which
includes
high
flammability,
accelerating
wear,
material
degradation,
oxidation,
and
poor
surface
finish
under
machining
forces.
These
are
overcome
with
non
contact
substrate
type
of
wire
electrical
discharge
(WEDM).
This
study
carried
out
WEDM
AZ91D
alloy
by
conducting
various
experiments
based
on
Taguchi
L18
orthogonal
array.
The
key
attributes
influence
such
as
feed
rate
(WF),
fluid
pressure
(FP),
gap
voltage
(GV),
pulse
period
(PT
ON
),
off
OFF
)
were
utilized
to
assess
the
quality
characteristics
like
irregularity
(R
a
removal
(MRR),
microhardness
(MH).
Additionally,
hybrid
method
combining
gray
relational
analysis
(GRA)
genetic
algorithm
(GA)
developed
applied
achieve
multi
objective
optimization
characteristics.
effects
have
been
studied.
percentage
improvement
between
GRA-GA
GRA
approach
contributed
33.552%
for
MRR,
20.8619%
R
,
8.34%
MH.
error
difference
expected
experimental
values
varies
within
range
±5%,
implies
strong
correlation.
optimal
setting
pressure:-
1
bar;
pulse-on-period:-
125
µs;
pulse-off
period:-
60
voltage:-
10
V;
rate:-
4
mm/min
minimum
maximum
microhardness.
optimized
parameters
can
enhance
accuracy
medical
implants,
leading
improved
biocompatibility
reduced
risk
complications.
Materials,
Год журнала:
2025,
Номер
18(8), С. 1803 - 1803
Опубликована: Апрель 15, 2025
Additive
manufacturing
of
Ti6Al4V
alloys
via
laser
powder
bed
fusion
(L-PBF)
has
demonstrated
superior
tensile
strength
compared
to
conventional
methods.
However,
challenges
remain
in
enhancing
ductility
and
tailoring
mechanical
properties
for
specific
applications.
In
this
work,
we
show
a
feasible
method
regulate
the
additively
Ti
alloys.
with
different
Nb
content
(1,
3,
10
wt.%)
were
fabricated
through
situ
alloying
using
mixture
powders.
The
shows
good
printability,
dense
Ti6Al4V-xNb
are
obtained.
Although
distribution
is
highly
heterogeneous,
no
solidification
cracks
or
secondary
intermetallics
detected
both
Nb-rich
Nb-lean
regions.
microstructure
gradually
refined
increase
addition,
mainly
due
heterogeneous
nucleation
caused
by
partially
melted
particles.
L-PBF-fabricated
T6Al4V-xNb
α’
martensite
phase,
even
addition
wt.%
Nb,
low
solute
matrix.
presence
β
phase
suggested
around
particles,
since
small
region
graded
formed
ultimate
increases
from
1050
1181
MPa
3
total
elongation
slightly
8.8%
10.5%.
With
largely
15.6%,
while
maintaining
high
1135
MPa.
Moreover,
elastic
modulus
decreases
105
80
GPa
wt.%.
results
work
suggest
that
L-PBF
promising
approach
optimize
performance
