Materials & Design,
Год журнала:
2024,
Номер
239, С. 112796 - 112796
Опубликована: Фев. 24, 2024
In
the
pursuit
of
simultaneously
improving
yield
strength
and
plasticity
austenitic
stainless
steel,
a
new
steel
was
fabricated
by
induction
smelting
using
pure
N2
atmosphere,
hot
forging,
cryogenic
rolling,
annealing.
The
material
characterized
microstructures
with
3–4
μm
uniform
finer
grains,
fine
precipitates,
high
thermal
stability
austenite,
extensive
high-angle
grain
boundaries.
elongation
after
fracture,
strength,
ultimate
tensile
samples
reached
53.5
%,
707
MPa,
1020
respectively,
as
well
61
600
977
at
same
time.
Moreover,
strain
hardening
rate
achieved
in
steel.
appropriate
grains
not
only
played
role
grain-refined
strengthening
but
also
provided
intragranular
spaces
sufficient
mean
free
available
paths
for
dislocation
accumulation
movement.
Precipitates,
which
were
coherent
or
semi-coherent
matrix,
interfaces
obstructions
Extensive
boundaries
served
another
important
factor
excellent
ductility
due
to
inhabitation
resulting
deviation
crack
propagation.
addition,
strain-induced
mechanical
twinning
current
contributed
strength.
Advanced Functional Materials,
Год журнала:
2024,
Номер
34(51)
Опубликована: Авг. 22, 2024
Abstract
Heterostructured
(HS)
materials,
characterized
by
heterogeneous
zones
with
differences
in
mechanical
or
physical
properties,
represent
a
revolutionary
advancement
material
science.
During
deformation,
hetero‐deformation‐induced
(HDI)
stress
forms
due
to
the
synergistic
interactions
between
soft
and
hard
zones,
leading
remarkable
HDI
strengthening
strain
hardening.
This
mechanism
significantly
enhances
their
performance,
surpassing
that
of
traditional
homogeneous
materials.
review
delves
into
classification,
preparation
techniques,
fundamental
deformation
mechanisms,
research
methods
HS
It
outlines
various
emphasizing
unique
characteristics
applications.
The
elaborates
on
mechanisms
focusing
non‐uniform
plastic
behavior
Furthermore,
it
explores
application
design
concepts
analyzing
microstructure
tuning
properties.
aims
serve
as
critical
reference
for
future
development
new
metallic
structural
paving
way
innovations
can
transform
multiple
industries.
By
highlighting
long‐term
impact,
this
not
only
understanding
materials
but
also
provides
roadmap
industrial
applications,
positioning
key
players
technology.
