Virtual and Physical Prototyping,
Год журнала:
2024,
Номер
19(1)
Опубликована: Март 13, 2024
Unintended
end-of-process
depression
(EOPD)
commonly
occurs
in
laser
powder
bed
fusion
(LPBF),
leading
to
poor
surface
quality
and
lower
fatigue
strength,
especially
for
many
implants.
In
this
study,
a
high-fidelity
multi-physics
meso-scale
simulation
model
is
developed
uncover
the
forming
mechanism
of
defect.
A
defect-process
map
EOPD
phenomenon
obtained
using
model.
It
found
that
formation
mechanisms
are
different
under
distinct
regions
process
parameters.
At
low
scanning
speeds
keyhole
mode,
long-lasting
recoil
pressure
large
temperature
gradient
easily
induce
EOPD.
While
at
high
shallow
molten
pool
morphology
solidification
rate
allow
evolve
into
an
quickly.
Nevertheless,
conduction
Marangoni
effects
along
with
faster
Finally,
'step'
variable
power
strategy
proposed
optimise
defects
case
volumetric
energy
density
speeds.
This
work
provides
profound
understanding
valuable
insights
control
LPBF
fabrication.
Journal of Engineering Research,
Год журнала:
2024,
Номер
unknown
Опубликована: Фев. 1, 2024
This
paper
emphasizes
the
benefits
of
using
composite
materials
in
manufacturing
automobile
components
instead
conventional
metal.
Some
unknown
and
unorganized
information
on
multifunctional
phenomena
is
guided
by
relevance
for
manufacturing.
Researchers
enhance
variation
composites
to
achieve
better
performance
every
sector
as
well
vehicle
industry.
Due
high
durability,
strength,
lightweight,
corrosion
tolerance,
ballistic
are
used.
other
features,
like
fire
lightning
protection
behaviour,
can
be
imposed
within
a
very
easy
economical
fabrication
process.
Chassis,
braking-related
components,
steering
systems,
battery
charging-related
objects,
differential
suspension
systems
depend
adequately
materials.
Composite
may
look
complex,
but
their
overall
significance
lucrative
introducing
new
types
Composites
already
considered
turning
point
material
science.
Very
shortly,
it
will
provide
variety
scopes,
natural
fibre
used
ensuring
biodegradability.
Huge
limitations
characterized
components.
Overall
output
consistently
developing
modern
technology
safety
both
environment
mankind.
The
price
quite
different
features
Even
then,
reduces
cost
than
traditional
which
improving
opportunities
manufacturers.
perspective
piezoelectricity,
magneto
strictive
properties,
self-healing
capability
electromagnetic
sheilding
accelerate
this
field
long
term
future
discussed
review
paper.
International Journal of Extreme Manufacturing,
Год журнала:
2024,
Номер
6(5), С. 052006 - 052006
Опубликована: Июнь 5, 2024
Abstract
Metal
matrix
composites
(MMCs)
are
frequently
employed
in
various
advanced
industries
due
to
their
high
modulus
and
strength,
favorable
wear
corrosion
resistance,
other
good
properties
at
elevated
temperatures.
In
recent
decades,
additive
manufacturing
(AM)
technology
has
garnered
attention
as
a
potential
way
for
fabricating
MMCs.
This
article
provides
comprehensive
review
of
endeavors
progress
AM
MMCs,
encompassing
available
technologies,
types
reinforcements,
feedstock
preparation,
synthesis
principles
during
the
process,
typical
AM-produced
strengthening
mechanisms,
challenges,
future
interests.
Compared
conventionally
manufactured
MMCs
exhibit
more
uniformly
distributed
reinforcements
refined
microstructure,
resulting
comparable
or
even
better
mechanical
properties.
addition,
can
produce
bulk
with
significantly
low
porosity
fabricate
geometrically
complex
MMC
components
lattice
structures.
As
reviewed,
many
such
Al
composites,
Ti
nickel
Fe
etc,
have
been
successfully
produced.
The
contents
strongly
influence
choice
technology,
applied
processing
parameters.
these
four
primary
mechanisms
identified:
Hall–Petch
strengthening,
dislocation
load
transfer
Orowan
strengthening.
technologies
offer
advantages
that
enhance
when
compared
traditional
fabrication
methods.
Despite
above,
further
challenges
still
faced,
new
methods
investigating
intrinsic
nature
coupled
processes.
Therefore,
concludes
by
discussing
interests
Journal of Magnesium and Alloys,
Год журнала:
2024,
Номер
12(4), С. 1260 - 1282
Опубликована: Апрель 1, 2024
Biomedical
magnesium
(Mg)
alloys
have
garnered
significant
attention
because
of
their
unique
biodegradability,
favorable
biocompatibility,
and
suitable
mechanical
properties.
The
incorporation
rare
earth
(RE)
elements,
with
distinct
physical
chemical
properties,
has
greatly
contributed
to
enhancing
the
performance,
degradation
behavior,
biological
performance
biomedical
Mg
alloys.
Currently,
a
series
RE-Mg
are
being
designed
investigated
for
orthopedic
implants
cardiovascular
stents,
achieving
substantial
encouraging
research
progress.
In
this
work,
comprehensive
summary
state-of-the-art
in
is
provided.
physiological
effects
design
standards
RE
elements
discussed.
Particularly,
behavior
including
underlying
action
studied
in-depth.
Furthermore,
preparation
techniques
current
application
status
reviewed.
Finally,
we
address
ongoing
challenges
propose
future
prospects
guide
development
high-performance
Mg-RE
Journal of Magnesium and Alloys,
Год журнала:
2024,
Номер
12(3), С. 890 - 939
Опубликована: Март 1, 2024
Realising
the
potential
of
Magnesium
(Mg),
several
globally
leading
ventures
have
invested
in
Mg
industry,
but
their
relatively
poor
corrosion
resistance
is
a
never
ending
saga
till
date.
The
and
bio-corrosion
behaviour
has
gained
research
attention
still
remains
hot
topic
application
automobile,
aerospace
biomedical
industries.
intrinsic
high
electrochemical
nature
limits
utilization
diverse
application.
This
scenario
prompted
development
composites
with
an
aim
to
achieve
superior
resistance.
present
review
enlightens
influence
grain
size
(GS),
secondary
phase,
texture,
type
matrix
reinforcement
on
composites.
Firstly,
manufactured
by
primary
processing
routes
are
elucidated.
Secondly,
comprehensive
mechanisms
these
proposed.
Thirdly,
individual
role
GS,
texture
corrosive
medium
clarified
revealed.
challenges
encountered,
unanswered
issues
this
field
explained
detail
accordingly
scope
for
future
framed.
presented
from
basic
concrete
background
advanced
creating
interest
among
readers
like
students,
researchers
industry
experts
various
backgrounds.
Indeed,
critically
reviewed
first
time
to:
(i)
contribute
body
knowledge,
(ii)
foster
development,
(iii)
make
breakthrough,
(iv)
create
life
changing
innovations
composite
corrosion.
Journal of Magnesium and Alloys,
Год журнала:
2024,
Номер
12(3), С. 1239 - 1256
Опубликована: Март 1, 2024
The
ex-situ
incorporation
of
the
secondary
SiC
reinforcement,
along
with
in-situ
tertiary
and
quaternary
Mg3N2
Si3N4
phases,
in
primary
matrix
Mg2Si
is
employed
order
to
provide
ultimate
wear
resistance
based
on
laser-irradiation-induced
inclusion
N2
gas
during
laser
powder
bed
fusion.
This
substantialized
both
thermal
diffusion-
chemical
reaction-based
metallurgy
Mg2Si–SiC/nitride
hybrid
composite.
study
also
proposes
a
functional
platform
for
systematically
modulating
functionally
graded
structure
modeling
build-direction-dependent
architectonics
additive
manufacturing.
strategy
enables
development
compositional
gradient
from
center
edge
each
melt
pool
Consequently,
coefficient
friction
composite
exhibits
309.3%
decrease
–1.67
compared
–0.54
conventional
nonreinforced
structure,
while
tensile
strength
171.3%
increase
831.5
MPa
485.3
structure.
outstanding
mechanical
behavior
due
(1)
complementary
synergistic
reinforcement
effects
nitride
compounds,
which
possesses
an
intrinsically
high
hardness,
(2)
strong
adhesion
these
compounds
despite
their
small
sizes
low
concentrations.
Journal of Magnesium and Alloys,
Год журнала:
2024,
Номер
12(7), С. 2595 - 2623
Опубликована: Май 9, 2024
Magnesium
matrix
composites
have
garnered
significant
attention
in
recent
years
owing
to
their
exceptional
lightweight
properties
and
notable
potential
various
engineering
applications.
The
interface
generally
acts
as
a
"bridge"
between
the
reinforcement,
playing
crucial
roles
critical
processes
such
load
transfer,
failure
behavior,
carrier
transport.
A
deep
understanding
of
interfacial
structures,
properties,
effects
holds
paramount
significance
study
composites.
This
paper
presents
comprehensive
review
prior
researches
related
Mg
Firstly,
different
structures
interaction
mechanisms
encompassing
mechanical,
physical,
chemical
bonding
are
introduced.
Subsequently,
mechanical
influence
on
overall
discussed.
Finally,
addresses
diverse
modification
methods
including
alloying
reinforcement
surface
treatment.
International Journal of Extreme Manufacturing,
Год журнала:
2023,
Номер
5(4), С. 042009 - 042009
Опубликована: Авг. 21, 2023
Highlights
The
process-formability-microstructure-performance
relationship
in
additively
manufactured
Mg
and
its
alloys
was
reviewed.
underlying
mechanisms
behind
defect
formation,
microstructure
evolution
performance
improvement
were
discussed.
A
full
chain
development
from
raw
materials
to
equipment
process
emphasized.
Journal of Magnesium and Alloys,
Год журнала:
2023,
Номер
11(5), С. 1485 - 1504
Опубликована: Май 1, 2023
Biodegradable
metals
such
as
magnesium
(Mg)
and
its
alloys
have
attracted
extensive
attention
in
biomedical
research
due
to
their
excellent
mechanical
properties
biodegradability.
However,
traditional
casting,
extrusion,
commercial
processing
limitations
manufacturing
components
with
a
complex
shape/structure,
these
processes
may
produce
defects
cavities
gas
pores
which
can
degrade
the
usefulness
of
products.
Compared
conventional
techniques,
additive
(AM)
be
used
precisely
control
geometry
workpieces
made
different
Mg-based
materials
multiple
geometric
scales
desirable
medical
products
for
orthopedics,
dentistry,
other
fields.
detailed
thorough
understanding
raw
materials,
processes,
properties,
applications
is
required
foster
production
by
AM.
This
review
summarizes
recent
advances
important
issues
pertaining
AM
discusses
future
development
application
trends.
