Materials,
Journal Year:
2021,
Volume and Issue:
14(23), P. 7143 - 7143
Published: Nov. 24, 2021
Ball-end
cutters
are
widely
used
for
machining
the
parts
of
Ti-6Al-4V,
which
have
problem
poor
machined
surface
quality
due
to
low
cutting
speed
near
tool
tip.
In
this
paper,
through
experiments
inclined
in
different
feed
directions,
it
is
found
that
adhered
damages
will
form
on
under
certain
postures.
It
determined
formation
damage
related
material
adhesion
edge
and
cutting-into/out
position
within
per-rotation
cycle.
order
analyze
process
more
clearly
postures,
projection
models
cutter
workpiece
engagement
contact
plane
established;
thus,
complex
geometry
space
transformed
into
plane.
Combined
with
case
cutting-into/out,
chip
morphology,
mechanism
analyzed.
The
analysis
results
show
can
increase
height
parameters
Sku,
Sz,
Sp,
Sv
topographies.
normal
without
(Sku
≈
3)
about
4-6,
2-3,
2-3
μm,
while
>
reach
8-20,
4-14,
3-6
μm
down-milling
10-25,
7-18,
3-7
up-milling.
direction
should
be
selected
along
upper
left
(Q2:
β
∈
[0°,
90°])
or
lower
(Q3:
[90°,
180°])
avoid
process.
For
up-milling,
right
(Q1:
(-90°,
0°])
90°)).
Measurement Sensors,
Journal Year:
2021,
Volume and Issue:
18, P. 100352 - 100352
Published: Sept. 27, 2021
In
this
paper
the
novel
method
for
analysis
of
results
surface
topography
measurement
was
presented.
The
plateau-valley
separation
approach
(PVSA),
based
on
thresholding
valley
component
analysed
texture
detail
proposed.
Cylindrical
topographies
with
additionally
burnished
dimples
and
laser-textured
surfaces,
measured
a
stylus
or
optical
instruments
were
studied.
It
found
that
PVSA
can
be
fairly
advantageous
in
areal
than
regular,
commonly-used
procedures.
effect
scheme
values
parameters,
from
ISO
25178
standards,
also
studied
detail.
Journal of Physics Conference Series,
Journal Year:
2021,
Volume and Issue:
2130(1), P. 012033 - 012033
Published: Dec. 1, 2021
Abstract
This
paper
comparatively
investigates
the
cavitation
erosion
damage
of
two
self-fluxing
NiCrSiB
hardfacings
deposited
via
oxy-acetylene
powder
welding
method.
Examinations
were
conducted
according
to
procedure
given
by
ASTM
G32
standard.
In
order
research
(CE),
vibratory
apparatus
was
employed.
The
damaged
surfaces
inspected
using
a
scanning
electron
microscope,
optical
microscope
and
surface
profilometer.
hardness
A-NiCrSiB
hardfacing
equals
908HV
while
that
C-NiCrSiB
amounts
399HV.
showed
CE
resistance
is
higher
than
A-NiCrSiB.
results
demonstrate
in
case
multiphase
materials,
like
hardfacings,
cannot
be
key
factor
for
estimation
whereas
it
strongly
subjected
material
microstructure.
qualitatively
recognise
at
exposure
time,
following
factors
should
respected:
physical
mechanical
properties,
microstructure
also
loss
eroded
morphology,
both
stated
specific
testing
time.
general
idea
welds
presented.
Materials,
Journal Year:
2021,
Volume and Issue:
14(23), P. 7143 - 7143
Published: Nov. 24, 2021
Ball-end
cutters
are
widely
used
for
machining
the
parts
of
Ti-6Al-4V,
which
have
problem
poor
machined
surface
quality
due
to
low
cutting
speed
near
tool
tip.
In
this
paper,
through
experiments
inclined
in
different
feed
directions,
it
is
found
that
adhered
damages
will
form
on
under
certain
postures.
It
determined
formation
damage
related
material
adhesion
edge
and
cutting-into/out
position
within
per-rotation
cycle.
order
analyze
process
more
clearly
postures,
projection
models
cutter
workpiece
engagement
contact
plane
established;
thus,
complex
geometry
space
transformed
into
plane.
Combined
with
case
cutting-into/out,
chip
morphology,
mechanism
analyzed.
The
analysis
results
show
can
increase
height
parameters
Sku,
Sz,
Sp,
Sv
topographies.
normal
without
(Sku
≈
3)
about
4-6,
2-3,
2-3
μm,
while
>
reach
8-20,
4-14,
3-6
μm
down-milling
10-25,
7-18,
3-7
up-milling.
direction
should
be
selected
along
upper
left
(Q2:
β
∈
[0°,
90°])
or
lower
(Q3:
[90°,
180°])
avoid
process.
For
up-milling,
right
(Q1:
(-90°,
0°])
90°)).
