IPC-TM-650 EN 2022 试验方法--.pdf - 第229页
Note : Note: Note: Note: Note: Figure 2 Fatigue du ctility flex tester IPC-TM-650 Number Subject Date Revision Page 2 of 3 2.4.2.1 Flexural Fatigue and Ductility, Foil 3/91 D I PC-2421 -2 For flexural fatigue tests lastin…
NOTE:
The Institute for Interconnecting and Packaging Electronic Circuits
2215 Sanders Road • Northbrook, IL 60062-6135
Material in this Test Methods Manual was voluntarily established by Technical Committees of the IPC. This material is advisory only
and its use or adaptation is entirely voluntary. IPC disclaims all liability of any kind as to the use, application, or adaptation of this
material. Users are also wholly responsible for protecting themselves against all claims or liabilities for patent infringement.
Equipment referenced is for the convenience of the user and does not imply endorsement by the IPC.
Page 1 of 1
IPC-TM-650
TEST
METHODS
MANUAL
1
Scope
Ductility
values
are
determined
by
measuring
the
bulge
height
on
a
Mullen
bulge
tester
or
equivalent.
Measure¬
ments
are
made
in
mm.
2
Applicable
Documents
None
3
Test
Specimen
Three
clean,
smooth
pieces
of
copper
foil
10
cm
x
10
cm
area
or
any
non-overlapping
equivalent
areas.
4
Apparatus
Mullens
Bulge
Tester
by
B.
F.
Perkins
&
Son,
Inc.,
Model
A
to
be
1
0
RPM
at
large
shaft
between
gear
box
and
diaphragm,
or
equivalent.
5
Procedure
5.1
Preparation
Raise
upper
clamping
ring
by
rotating
the
hand
wheel.
Place
a
10
cm
x
10
cm
by
0.15
mm
thick
steel
plate
that
is
perfectly
flat
over
the
diaphragm
and
lower
the
upper
clamping
ring
applying
sufficient
pressure
to
prevent
slippage.
Zero
the
dial
indicator.
Raise
the
upper
clamping
ring
and
remove
the
10
cm
x
10
cm
by
0.15
mm
steel
plate.
The
above
operation
should
be
done
once
every
eight-hour
shift.
Start
the
motor
and
move
the
ball-handled
control
lever
to
the
right
to
be
certain
that
the
diaphragm
is
returned
to
its
start¬
ing
position.
Number
2.4.2
Subject
Ductility
of
Copper
Foil
Date
Revision
3/76
A
Originating
Task
Group
N/A
5.2
Test
5.2.1
Place
a
sample
of
the
copper
foil
to
be
tested
over
the
diaphragm
with
the
matte
side
up.
5.2.2
Lower
the
clamping
ring,
applying
sufficient
pressure
to
prevent
slippage
of
the
sample
between
the
plates.
5.2.3
Move
the
ball-handled
control
lever
to
the
left.
The
operator
should
keep
his
hand
on
the
lever
in
readiness
to
stop
or
reverse
the
machine
at
any
time
during
the
test
and
when
the
test
is
complete.
During
the
test,
the
operator
should
be
watching
the
dial
indicator
and,
at
the
instant
burst¬
ing
occurs,
should
note
the
reading
on
the
dial
indicator
and
the
ball-handled
control
lever
should
be
moved
as
far
to
the
right
as
it
will
go
and
be
released.
This
will
return
the
dia¬
phragm
to
its
starting
position
and
automatically
shut
off
the
pump.
5.3
Evaluation
5.3.1
Record
the
reading
from
the
dial
indicator.
5.3.2
Rotate
the
hand
wheel
to
raise
the
clamping
ring
and
remove
the
sample.
Avoid
overlapping
of
the
clamping
areas
and
disregard
any
single
reading
that
is
not
reasonably
con¬
sistent
with
those
taken
in
neighboring
areas,
and
repeat
the
test.
Note:
Note:
Note:
Note:
Note:
Figure 2 Fatigue ductility flex tester
IPC-TM-650
Number
Subject Date
Revision
Page 2 of 3
2.4.2.1
Flexural
Fatigue
and
Ductility,
Foil
3/91
D
I
PC-2421
-2
For
flexural
fatigue
tests
lasting
in
excess
of
1000
cycles,
the
adhesive
tape
attachment
needs
to
be
substantial
enough
to
prevent
relative
sliding
of
specimen
and
sample
holder
as
a
result
of
the
cyclic
flexure
movements.
5.2
Test
Procedure
5.2.1
Mount
mandrels
to
flex
tester,
adjust
the
support
roller
positions
for
a
clearance
of
1.27
mm
[0.05
inch]
(shim
provided)
between
rollers
and
mandrels.
For
the
ductility
test,
it
is
important
that
the
specimens
fail
between
30
and
500
cycles.
Mandrels
with
2.0
or
1.0
mm
[0.079
or
0.040
inch]
diameter
are
suggested
but
for
some
samples,
mandrel
diameters
different
from
these
diameters
might
be
necessary.
Larger
mandrel
diameters
result
in
longer
cyclic
life
and
smaller
diameters
in
shorter
life.
5.2.2
Mount
test
specimen
between
mandrels,
attach
relay
leads
with
alligator
clips
to
foil
weight
wing
nut
to
form
uslip-
off"
electrical
connections,
plug
relay
leads
into
relay
jacks,
set
counter
to
zero,
and
start
flex
tester.
5.2.3
Complete
separation
of
the
foil
specimen
constitutes
failure
and
the
flex
tester
stops
automatically
when
the
drop¬
ping
foil
weight
dislodges
the
alligator
clips
from
the
wing
nut.
5.2.4
Record
cycles-to-failure
indicated
on
counter.
5.3
Evaluation
5.3.1
Ductility
Test
5.3.1.
1
Calculate
the
ductility
for
each
specimen
by
itera¬
tively
solving
the
formula
below:
0.36
C76
Su
exp(Df)
Nf-O.6Df0.75
+
0.9
优
M
(0.1785
log
峪—
°
Nf
2e+t
—
u
where:
Df
二
fatigue
ductility,
inch/inch
(x100,%)
M
=
cycles-to-failure
Su
=
ultimate
tensile
strength,
psi
E
=
modulus
of
elasticity,
psi
tM
=
core
thickness,
inch
t
=
specimen
micrometer
thickness,
inch
e
=
mandrel
radius
of
curvature,
inch
within
0.005
mm
[0.0002
inch]
Determine
Sd
as
per
Test
Method
2.4.18
of
IPC-TM-
650.
Determine
E
during
the
test
for
Su
by
unloading
and
reloading
after
about
2%
elongation
and
measuring
the
slope
of
the
reloading
curve.
The
determination
of
E
foils
is
not
a
straightforward
procedure.
It
is
therefore
suggested
that
for
specification
pur¬
poses
standard
values
of
E
be
adopted.
For
copper
foil
such
standard
values
might
be:
E(CF-E)
=
1
2
x
1
06
psi
for
electro¬
deposited
foil,
E(CF-W)
=
1
6
x
1
06
psi
for
wrought
(rolled)
foil.
The
calculator
program
described
in
paragraph
6.2
solves
the
ductility
formula
and
conveniently
prompts
for
all
necessary
input
parameters.
5.3.1.
2
Report
the
average
ductility
from
at
least
three
specimens.
5.3.2
Fatigue
Test
The
number
of
cycles
to
failure,
is
the
flexural
fatigue
life
in
fully
reversed
bending
for
the
bend
radius
corresponding
to
the
radius
(1/2
diameter)
of
the
test
man¬
drels
used.
An
average
flexural
life
from
at
least
three
speci¬
mens
should
be
reported.
5.3.3
Fatigue
Behavior
The
fatigue
behavior
of
a
sample
can
be
obtained
by
determining
the
flexural
fatigue
life
with
a
number
of
different-diameter
mandrels.
Plotting
the
results
in
a
strain
range
versus
fatigue
life
Manon-Coffin
plot
log
Ae
=
[2tM/(2e
+
t)]
versus
log
Nf)
allows
intra-
and
extrapolation
to
other
bend
radii
or
fatigue
lives.
IPC-TM-650
Number
Subject Date
Revision
Page 3 of 3
2.4.2.1
Flexural
Fatigue
and
Ductility,
Foil
3/91
D
5.3.4
The
flexural
fatigue
life
at
bend
radii
other
than
man¬
drel
radius
can
also
be
obtained
by
evaluating
the
ductility
for¬
mula
for
the
flex
life
in
cycles-to-failure
using
the
fatigue
duc¬
tility
determined
in
5.3.1
.2
and
the
desired
bend
radius.
6.0
Notes
For
further
technical
details,
reference
the
mate¬
rial
shown
below.
6.1
Document
in
paragraph
2.0
(IPC-TP-204).
6.2
Engelmaier,
W.,
"Fatigue
Ductility
for
Foils
and
Flexible
Printed
Wiring,”
Program
No.
1883D
HP-67/97
User's
Library,
Hewlett
Packard
Co.,
Corvallis,
Oregon,
1978.
6.3
Engelmaier,
W.,
“Fatigue
Ductility
Flex
Tester,”
Drawing
L520163,
Bell
Telephone
Laboratories,
Inc.,
Whippany,
New
Jersey,
1978.
6.4
Test
Equipment
Sources
The
equipment
sources
described
below
represent
those
currently
known
to
the
industry.
Users
of
this
test
method
are
urged
to
submit
addi¬
tional
source
names
as
they
become
available,
so
that
this
list
can
be
kept
as
current
as
possible.
6.4.1
Fatigue
Ductility
Flex
Tester,
Universal
Tool
&
Machine
Inc.,
171
Coit
St.,
Irvington,
NJ
07111;
201-374-4400.
6.4.2
JDC
Precision
Sample
Cutter,
Model
J
DC
125-N
or
equal.