Metals,
Год журнала:
2024,
Номер
14(12), С. 1428 - 1428
Опубликована: Дек. 13, 2024
High-strength
steels
such
as
Dual
Phase
(DP),
Transformation-Induced
Plasticity
(TRIP),
and
Twinning-Induced
(TWIP)
have
gained
importance
in
automotive
applications
due
to
the
potential
for
weight
reduction
increased
performance
crash
tests.
However,
resistance
increases,
there
is
also
an
increase
springback
residual
stresses
after
forming
process.
This
mainly
because
of
greater
elastic
region
these
materials
other
factors
associated
with
strain
hardening,
Bauschinger
effect,
that
brings
theory
kinematic
hardening
mathematical
modeling.
means
finite
element
software
must
consider
properties
so
simulation
can
accurately
predict
behavior.
Currently,
this
knowledge
still
not
widespread
since
it
has
never
been
used
conventional
materials.
Additionally,
engineers
researchers
use
Forming
Limit
Diagram
(FLD)
curve
their
studies.
does
fully
represent
actual
failure
limit
materials,
especially
high-strength
Based
on
this,
Fracture
(FFLD)
emerged,
which
proposes
resolve
limitations.
Thus,
review
aims
focus
how
methods
all
modeling,
when
comes
responses
steels.
Materials,
Год журнала:
2025,
Номер
18(10), С. 2220 - 2220
Опубликована: Май 11, 2025
The
accuracy
of
numerical
predictions
in
sheet
metal
processes
involving
multiaxial
stress-strain
states
(e.g.,
blanking,
riveting,
and
incremental
forming)
heavily
depends
on
the
characterisation
plastic
anisotropy
under
loading
conditions.
A
fully
calibrated
3D
model
is
essential
for
this
purpose.
While
in-plane
material
behaviour
can
be
conventionally
characterised
through
uniaxial
equi-biaxial
tensile
tests,
calibrating
out-of-plane
remains
a
significant
challenge.
This
behaviour,
governed
by
shear
stress
associated
parameters,
typically
described
yielding.
These
parameters
are
notoriously
difficult
to
determine,
leading
researchers
frequently
assume
isotropic
or
identical
responses.
Although
advanced
calibrations
may
utilise
crystal
plasticity
modelling,
there
critical
need
macro-mechanical
methods.
paper
presents
an
testing
procedure
based
full-field
strain
measurements
using
digital
image
correlation
(DIC).
Strains
within
zone
measured
via
DIC
employed
Finite
Element
Model
Updating
(FEMU)
identify
2.42
mm
thick,
cold-rolled
AW5754-H22
aluminium
alloy
sheet,
Yld2004-18p
yield
criterion.
Given
that
characteristic
response
at
scale
influenced
local
structure
surface,
evaluates
feasibility
such
measurements.
Finally,
test
validity
full-field-based
approach,
FEMU-identified
compared
against
results
obtained
classical
optimisation
force-elongation
from
zone.
Journal of Materials Science,
Год журнала:
2024,
Номер
59(29), С. 13690 - 13708
Опубликована: Июль 4, 2024
Abstract
The
damage
mechanisms
of
ductile
fracture
under
shear
loading
an
aluminum
alloy
2198T8R
were
studied
using
flat
thin-sheet
samples.
One
sample
was
loaded
until
85%
the
failure
displacement
and
then
unloaded,
another
one
up
to
failure.
To
overcome
inherent
shortcomings
nanotomography
concerning
investigation
samples,
synchrotron
nano-laminography
applied
pre-loaded
provided
structural
information
down
nanometer
scale,
allowing
nucleation
evolution
be
studied.
features,
including
cracks
intermetallic
particle-related
damage,
visualized
in
3D
from
highly-deformed
band
region.
Using
nano-laminography,
no
nano-voids
found.
damaged
ligament
also
observed
after
polishing
via
destructive
correlative
scanning
electron
microscope
(SEM)
back-scatter
diffraction
(EBSD)
which
suggests
that
detrimental
both
intergranular
transgranular.
related
bands.
No
could
found
SEM
analysis.
Fractography
on
second
broken
revealed
contained
hardly
observable
nanometer-sized
dimples.
final
coalescence
region
covered
by
sub-micrometer-sized
dimples,
inside
dispersoid
particles
present.
fact
nano-void
for
pre-deformed
implies
nucleation,
growth
these
voids
occur
at
late
stages
history.
Advanced Engineering Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 13, 2024
An
Al‐based
composite
reinforced
with
titanium‐based
metallic
glassy
particles
is
synthesized
by
the
powder
metallurgy
method
through
mechanical
alloying
followed
hot
extrusion.
The
effect
of
precipitation
heat
treatment
on
structure
and
properties
studied.
During
aging
solution‐treated
composite,
crystallization
reinforcement
becomes
more
pronounced
as
solutionizing
temperature,
time,
time
increase.
A
reaction
layer
has
formed
at
interface
between
matrix
after
treatment.
It
found
that
addition
promotes
nanophase
in
matrix.
With
appropriate
treatment,
compressive
strength,
yield
fracture
strain
have
increased
to
942,
635
MPa,
27%,
respectively.
Herein,
it
demonstrated
these
composites
can
be
further
enhanced
an
process,
thereby
having
significant
potential
for
a
variety
industries,
including
aerospace,
automotive,
defense,
where
high‐strength,
lightweight
materials
are
critical
performance
safety.
Metal
forming
processes
present
many
changes
in
the
strain
path
necessary
to
obtain
dimensions
and
shape
of
a
metal
part.
The
loading
mode,
amount
prestrain,
initial
state
material
its
respective
substructural
arrangements
affect
mechanical
properties
different
products.
Many
phenomena,
such
as
Bauschinger
Effect,
occur
during
operation
when
materials
are
subject
mix
efforts.
These
events
can
be
associated
with
dislocation
substructure
crystallographic
orientations.
Considering
effect
on
responses
metallic
parts,
this
work
investigates
behaviour
AISI
409
steel
submitted
route
composed
cold
rolling,
tensile
shearing
operations,
modifying
direction
last
loading.
results
indicated
effort
occurrence
work-hardening
rate
transient
for
carried
out
at
0°
minor
conducted
45°
due
non-significant
substructure.
Metals,
Год журнала:
2024,
Номер
14(12), С. 1428 - 1428
Опубликована: Дек. 13, 2024
High-strength
steels
such
as
Dual
Phase
(DP),
Transformation-Induced
Plasticity
(TRIP),
and
Twinning-Induced
(TWIP)
have
gained
importance
in
automotive
applications
due
to
the
potential
for
weight
reduction
increased
performance
crash
tests.
However,
resistance
increases,
there
is
also
an
increase
springback
residual
stresses
after
forming
process.
This
mainly
because
of
greater
elastic
region
these
materials
other
factors
associated
with
strain
hardening,
Bauschinger
effect,
that
brings
theory
kinematic
hardening
mathematical
modeling.
means
finite
element
software
must
consider
properties
so
simulation
can
accurately
predict
behavior.
Currently,
this
knowledge
still
not
widespread
since
it
has
never
been
used
conventional
materials.
Additionally,
engineers
researchers
use
Forming
Limit
Diagram
(FLD)
curve
their
studies.
does
fully
represent
actual
failure
limit
materials,
especially
high-strength
Based
on
this,
Fracture
(FFLD)
emerged,
which
proposes
resolve
limitations.
Thus,
review
aims
focus
how
methods
all
modeling,
when
comes
responses
steels.
