Material testing CTOD.Tests on 35mm welded API.5L.X60

CTOD.TESTS ON 35mm WELDED APL5L.X60

1!ELFT-3 JULY !90.

Teòhnisché 'Universitéit Deift

ING RVON'K

REPORTNÓH27

SSL 327

DATE:: 3 JULY 199O

::pRojEcT:. SC 9OO2

Y

'CONTEÑTS

i Introduction

2 Material and specimens 3 Precracking and bend tests 41

Results

5 Tables and graphs

a Data and results weld material b Data and results fusion line 6 Calibration data of MTS clip gauges

r -DELFT:UNI ,ERSItI i Íui ! eg2; ertänds page OLOGY'

This report gives CTOD-values for two sets of specimens tested at -10°C in accordance with BS 5762 1979

The tests have been carried out on request of the Apparaten- en Ketelfabriek AKF BV in Goes as part of the tests for a welding procedure qualification

WPQ NOC 11/90 Single-vee-45° OD 406 mm I

WT 34 9 mm Position 6G Material API SL Grade X60

2. MATERIAL AND SPECIMENS'

Twosets of specimenshave been tested.

Set 156W includes 3 specimens, through thickness notched with the notch located on the centre line of the weld (B * 2B specimen)

Set 156F includes 3 specimen, the weld metal notched with the pre-cracked front as close to the fusion line as possible (B * B

specimen)

The. yield atres Is assumed toe be:

base material a. = 413 N/nun2,

weld metal _av 440 N/mm2

The initiating notches have all been provided with integral type knife edges / The distance between the knife edges has been 5 mm

3. PRECRACKING. AND BEND TESTS

Precracking and bend tests have been carried out bending, in accordance to BS 5762 1979

n 3-point

ábOratory. DELFT therlàndé

A 100 kN load-controlled servo hydraulic testing machine has been used for the realisation of the fatigue precracking under constant amplitude loading at room temperature

The CTOD-tests have been carried out in a 350 kN load-controlled servo-hydraulic testing machine with a cryogene box

Cooling and stabilisation on the test temperature is obtained by accurately controlled liquid nitrogen injection through a solinoid valve Via a ducting system the nitrogen is distributed

homogeneously in the cryogene box, without influencing the measuring devices

The temperature is measured usinghermocouples incontact_with the test piece surface at the crack tip location in front and at the back side of the test piece

The test temperature for all specimens has been-l0°C The tests were started at a temperature of about 1°C below the test

temperature Depending on the amount of plastic deformation the measured temperatures rose to a value between 10°C and -8 5°C at the moment of failure

The COD's have been measured with a MTS clip gauge,, type

632.O2O-'2O, serial no. 67'5 The.calibratlon va'Ius .over r.ar%es of

0 5 and 2 6 mm are given in t1e tables and graphs on page 11 up to

'I5,;'-.

«'

2

The results are presented in the tables and graphs on page 3 up to

10.. '

All tests are valid according to BS 5762 1979

Except for specimen 156W1 all fracture surfaces show a normal appearance However, n specimen l56Wl the unstable crack

propagation during the COD-test has started partly onthe3 fatigue crack surface at a distance of about 5 mm from the crack tip in a piane perpendicular to the plane of the notch Determination of

the cause of this initiation requires a further detailed'

examination of the local crack surfaces

DELFT UNI ERSITY OF TECHNOLOGY

Departmen of Mechanical Engineering and Marine Technology

'DELF+ UÑIVERSITY ÒF TECHNÓLÓGY

FRACTURE'MECIÎANICS

TEST (CTOD-test

:Specimen nr.

W (height):.

B (thickness)

SHIP STRUCTURES LABORATORY

)

cf

BS-5762/1979

Fatigue p'recarcking.. data

_{3i point bendIng}

esting machth'kN)

_¡0.

: ' _10O

Test temperature (°C)

'r 20

20»

.. .20

Span

(mm) _{240 240 240}

Loading

(kN) _{33 33 33}

R (stress ratio)

i I

Kf

(Ñiim3/2),

1604

1567:

b525

Number of cycles

(*IOA3)

:

l6'.62

15.'Ó9

: '1:4.85

aO (;nim _'.

''1.2

_31.0

a4

(mm)

_3J2'

_30.4'

_'3'o»I

al

(zum)

_32.8

_32.3

_:

_32.0

a2

(mm)

_-.32.7

_32.4

:3 ₅ a (mm)

_31.4

_31.0'

a average /W

...: :529

_.521

J':

COD-test data

_{3 point bending}

Testing machine :(kN.)

Test temperature (°C)

rSp'an (mm)

'dK/dt

.':(Nnm:3, y (mm)

Vc.: pla'tic

(mm):

_.22

Vu comionent_(mm)

1 79 Vmax (mm) 3. OÓ

pl.'

(kN)

_.:

,Pc

(kÑ)

:.

_745.

Pu

(kN)

₈₄₅

'Pmax. (kN);

_84.5

, '

..

Calculated results

0 CTODi (mm) CTODc _{(mm) 12} CTODu (nun) ₅₆ CTODmax :, '(nun)' '.'' ...'.

,.8,7

;,

350 ' -, 350 ' 350 -10 ', . ,,

-Io.

",

-10 - .' 240

" .240

: ' 240

sl)..

'.

5.0'

"

" 54.8

53...6

.Yjel!d strength. used 1h c5ic.zlatioii's

_{440 N/mm2.}

JREMARKS'

: .: ' valid' valid va]d'

Date:

03.07.i99'0

ÑOJECT

S'c.9.O.:Ô2

CLIENT,: APPARATEW- 'EN KETEL'ABRIEK Ä1F - By

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DELFT UNIVERSITY OF 'J.ECHNOLOGY SHIP STRUCTURES LABORATORY

FRACTURE MECHAÑICS TEST (CÏOD-test) cf. BS-5762/1979

PROJECT SC 90 02 Date: 03.07.1990

CLIENT: - APPARATEN- EN KETELFABRIEKAKF BV

Specimen data

Specimen nr

W (height) (mm)

B (thickness).- (nun)

Fatigué i

akth data

resting machine (kN) Teat temperature (°C) Span (mm) Loading (kN) R (stress ratio) Kf (Nmm-3/2) Number of cycles (*l0'3) aO (mm). a4 (mm) . (mm), . a2 (mm) a3 (ij): a average / W

COD-test data . . ¿ point bending

Teating machine (kN) Test temperature (°C) Span (mm) dK/dt . :

(Nmm3/2

Vi (mm) Vc ( plastic (mm) Vu '(component (mm) Vmax - (mm) -. -Pi . (lcN) Pc (kN) Pu (kN) Pmax (kN) Calculated results CTODI. (mm) CTODc. :. (mm), CTODu (mm) CTODmax (mm) _1.77 . 1.13

Yield strength used in calculatiOns: 413 N/rnm2

REMARKS valid . valid

vlid

*

Specimen. 156F1-fatigue loading 22.0 kN, R = 0.1, 40 000 cycles

.and:29. 0..kN,R Ï I,.ilLi3IOicyc les.._

s-1) . 350. 350 350 -IO -10 -10 120 120 12O 54.9 55.4: 6O:.O 156F1 156F2 156F3 30 O 30 O 30 0 29.9 29.9. 29.9 3 point bending 100 100 100 20 2Ó . 20 120 120 120 29 29 .1. .1 . 1. 1397 1296 1321 25 3 28 8 1.1.. 1 9..9 9 .5 11.4 10.8 1.1.9 11.2 11.1 12 1 11 3 11 9 12.0 .11.0 . 11.1 .400 . .372 .379

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Calibration of MTS clip gauge 2 5 nun

Calibration device

LSC microspan

Clock gauges

O -

0 5 mm with 0 001 mm accuracy

2.,5 mrnwith 0O1 mm accuracy

Measurements (see tables and figures on

On July 2, 1990

I I

0-0.5mm

384 Volts/mm

_+1-

0.35%

0-2 5 mm

3 87 Volts/mm

_+1-

0 15%

0-0 5 mm

3 84 Volts/mm

_+1-

0 35%

0-2 5 msi

3 87 Volts/mm

/..

rO 15%

The maximum deviation in the range of 0 5 mm is 0 603 min and in the

range of2.5 mm ;the maximum deviation is 0005 mm

The

clip gauge/conditioner coinbiña,tjòñ ha been

_{ca ibrated on the 2nd}

and 4th of July 1990 (before and

er .CQD-ests)

Function obta±ned:

Y +(3...836 +- 0. 013)*(X)

+(l.25 +- 0.37)*E-02*(i):

Analysis of Variance

Sum of Squares Valüó Degr.Freedom Variancé

Total 1..4431E01 11

Due to regression _{i 4430E+01 2 7 2151E+00}

Residual 3 9509E-04 9 4 3899E-05

If the model is assumed to be correct, the estimated standard deviation of Y is 6 6256E-03 (absolute)

RelErr (Yreg - Y)/(Yreg)

2:.

D. O

12

MTS632-02C-20 ijking 0-Q.5 mm.

DELFT UNIV RSIJ

Ship

i

'OLOGY

'aboratory

eIands

Volta Cohdit.ibner -output

Calibration July 2 £990

0 -0.5 titi 4sith 0.001 elock

yauga

,n:croelc gauge 0 012 0 012 100 000 0 204 0 003 1 602 0 396 -0 007 -1 744 0 588 -0 005 -0 866 0 780 -0 004 -0 548 0 972 -0 005 -0 561 1 163 -0 008 -0 656 1 355 0 003 0 235 1 0 000 0 000 2 0 050 0 201 3 0 100 0 403 4 0 150 0 593 5 0 200 0 784 6 0 250 0 977 7 0 300 _{1 171} 8 0 350 1 352 9 _{0.400 1.544} 10 0.450 H 1.734 '0.500 1;928: 1.547 0.003 0.194 1.739

0005

0.277

i931

0.003 0.137

MTS 632-02C-20 Ijking 0-2.5 mm

Function obtained:

Y +(3.8711 +'- 0.0044)*(X) -l-(1.92 i-- .0.67)*E-02*(l)

Analysis of Variance

Sum of Squares Value Degr.Freedom Variance

Total 49365E+02 14

Due to regression: 4.9365E+o2 2 .2 !4682E+02

Residual 2.1010E-03 12 1.7508E-04

If the model is assumed to be correct, the estimated standard deviation of Y is 1.3232E-02 (absolute)

RelErr (Yreg- Y)/(Yreg)

Point 1 .

0000

2 0.200 3 0.400 4 0.600 5 0.800 6 1.000 7 1,200 8 1.400 9 1.600 10 1.800 11 2.000 12 2.200 13 2.400 14 2.600. X. Y 0.00.0 0.794 1.. 562 2. 335 3.128 3.911 4.666

5437

6.228 7.000 7.763

8536

9.284 10.080

Uolts condit ifner output

o 13 I I I I Yreg 0.019 0.793 1.568 2.342 3.116 3.890 4.665 5.439 6.213 6.987 7.762 8.536 9.310 lOE. 084 Calibration July 2. 1990 ti

2.6

tiliwith0.Oj'loI ya ge

00

DEIFT UNI Ship St I . I I I I I I

liti

clock gauge

I I RH

26

Yreg-Y RelErr(%) Ó.019 100.000 -0.001 -0.068 0.006 0.363 0.00.7 .0.295 -0.012 -0.381 -0.021 -0.530 -0.001 -0.030 0.002 0.034 -0.015 -0.241 -'O. 013 -0.182 O.001 _-0.019 -0.000 -0.003 0.026 0:279 .0.004 0;042 RR

MTS 632-02C-20.Ijk.ing'0-0.5 mm

Fünction obtained:.

Y = +(3.841 +- .0.013)*(x)

+(1.20 ±, 0140)*E-02*(1)

Analysis of VarIance

Sum of Squares Value Degr..Free'dom

Total 1.. 4454E+01 11

Due to regression i.. 4453E-i-01 2

Residual _{4..4141E-04 9 4.9045E-05}

If the model is assumed to be. _{correct, the estimated}

standard devIation of.Y is _{7.0032E-03 (absolute)}

RelErr (Yreg - Y)/(Yreg)

0.0

14

Point X

_Y

_{Yreg Yreg-Y}

RelErr(%)

00Ï2

0.012 l00.000 0.204 0.003 1.471 0.396 -0.006 -1.504 0.588 -0.003 -0.49,5 0.780 -0.009 -1.136 0.972 -0.004 -0.393 1.164 -0.007 . -0.582 '1.356 0.006 0.462 1.54:8 . -0.003 . -0.173 1.740 0.007 ' .0.423 1.932 . O002. . 0.125

RR-2.0.Volts conditioner output

Calibration July 4, 190

O - D. ii,i with 0.001 ii,i clock _au9e

liii clock gauge

DELFT UNIV 'SI

/

_Q

:. _10G

ShipS

Väriance 7 ..2267.E+O0 HR i 0.000 0.000 2 _{0.050 0.201} 3 0.100

0402

4 0.150 . 0.591 5 _{0.200 0.789} 6 _{0.250 '0.97.6} 7 0.300 1.171 8 0.350 1.350 9 _{0.400 1.551} 10 0.450 ' 1.733 11 . 0.500 . 1.930

TS 632.-02C-,Z0 Ìjkng...0.2.5 nim

::Fnciobtaned:

"-Y4-(3.8.744..0.0O4O)*(X)

+(l 39 +- O 61)*E-02*(l)

Sum of Squares Value Degr Freedom Variance

Total / 4 9374E+02 ₁₄

Due to regression 4 93,74E+02 2 2 4687E+02

Residua1 _{i 7355E-03 12 1 4462E-04}

If the model is assumed to be _{correct, the estimated}

standarddévjtjon of.Y 1s" l026E-O2(abso'iute),

RelErr (Yreg - . o 1 2 o. Analysis

oariance--,

0000

0.200,; 0.4Ó0 .'0.600 0..8:0o 1. boo. ,.c;, l.,2OO 1.40.0. 60Ö 1.800 2.00Q; 2.200 '24O'O' 2.600,

00o0

'1.'560.' '3.122 ':3:. 903' 5.440 Y6..229' ;,

7MO2

8.537 ,9.28.7 'Ô .014 0.7,89. 1. 5,64 339 3..l13 .3,888 6., 663 5.438 6..2Ï3 ..698I8: 7.763: 'g :538 "'93i3 .10.082 f:: l'iO,:..08t7:,, 'Yre ,: g-Y

liii clock gauge

0.014 '0,!Q03

'o .c

0.0Ò9 -o.:oo9. 100.000 359 0.238 '0.. 3:68 -0;273 _0,oi1' _{' -0.376} -0L'00,3. - '-0.059 -0 002 -0 034 -0 016 -0 257 -OE 014 -0 201 -0 003 -0 041 0.008 ' 0.026 f,

.275

0.005"

_O5'4

2. 6 RR