need for an external loading ssem. Bend secimens can be tsed in relaiely simple cniver beamequipment, but specmens subjected to tenson loading requie cnstnt load ceep rupture or smilar t
Trang 1} NTERNATI ONAL
STAN DARD
I SO 7539- 6
Second edi t on
I SO 7539- 6: 2003( E)
回 I SO 2003
Trang 2Thi s PDF f e ma y c on t ai n e mb ed de dt yef ac e s. I
PDF di scl ai mer
Trang 3) I SO 20 03一 Al l r gh t s r se r ed 1
Trang 5I NTERNATI ONAL STANDARD I SO 739 - : 00 3 E)
Cor r osi on of me t al s and al l oys一 St r ess c or r osi on t es t i ng一 Par t 6:
Trang 10need for an external loading ssem. Bend secimens can be tsed in relaiely simple cniver beamequipment, but specmens subjected to tenson loading requie cnstnt load ceep rupture or smilar tsigmachns. In tis cse, the expense cn be minimized by tsing cains of secimens conneced by ladin
Trang 11Cont our ed doubl e cant i ever | beam
Doubl e cant i ever beam
Trang 12b) tose which are (W-a) indiferent, such as the double cantever beam (DCB) specimen in which the bac
face is sfficenty remote fom te cak tp to ensue that is posion hs a neglile efect on te cak
dslacement in service staions;
d) modied wedge opening loaded (modied WOL) specmens, whih are also selfoaded and minmize te
materil requiment fr consant displacement tsing;
e) C-saped specimens, which can be machned fom tick-walld cylinders in order to sudy te radial
Trang 13
Di mens i ons i n mi l met r es, sur fac e r oughness v al u es i n mi c omet r es
Figure 2一 Proportonal dimensions and tolerances for cantlever bend tst pieces
。I SO 203一 Al l r gh t s r es er ve d 9
Trang 14二0, 6砰 二0, 25才 二1, 6 D
二0, 065 W ma xi mum 二0, 25砰t o 0, 40那
二0, 45牙 t o 0, 55附
Figure 3一 Proportional dimensions and tolerances for compact tension tst piees
Trang 16二0, 06 B 二0, 625 B 二0, 239 B
Trang 19Figure 8一 Knie edges for locaton of displacement gauges
Trang 20+
Trang 22,.  ̄
C ,
上 r,,, 一 」 一
u a
i s i nac cur ac y and val i di t y I m
Figure 10一 Stress intensity factor solution for double cantlver beam specimen [W-a) indifferent
18 ) I SO 20 0 3一 Al l r h s r es er ve d
Trang 23{ l
}
{ l
}一 Il
!i
l
!
} l l l
! I I
!1 ! ll
一 一 峪 、
一1! ll
Trang 24Figure 12一 Stress intensity fcor soluion for cantlever bend specimens
20 ) ISO 2003一 AU rghts rsrved
Trang 264 5希‘ 0 , 5 5 .
w ni cn case m e
Figure 14一 Strss intensity fcor solution for C-shaped specimens
Trang 28X- Y
丫. X
X_ Z Z- Y
Z- X 丫. 2
c) Non-basic facture plane identiation
a Gr ai n f low
Figure 15一 Fracture plane identicton
24 。I SO 20 03一 At l rh s r s er ved
Trang 35u i g r cmme n e d p o eu e . Th i s v l e e t b i h s t e u pr b ud t o Ki sc} Te f s t s r s
c r o i n t s t s a l t e n b e c n u t d a t a n i i a l s r s s i t n i y o f hl f K} } wi t h sb eu n t t s s a
Trang 42Te v l e o f Kl a s c a e d wi t h t e d / t vl e i s c mp u e d ui g t e f e d c a k l nt , 6 , c rs od n
to不.
Trang 44! CS 77. 060
Pr i e bse d on 3 8 pa ge s
) I SO 20 03一 Al l rhs r sr ve d