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ASTM Selected Technical Papers
Fracture Mechanics: Twenty-First Symposium
By
JP Gudas
JP Gudas
editor
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JA Joyce
JA Joyce
editor
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EM Hackett
EM Hackett
editor
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ISBN-10:
0-8031-1299-8
ISBN:
978-0-8031-1299-5
No. of Pages:
629
Publisher:
ASTM International
Publication date:
1990

Fracture toughness testing of steels in the ductile-to-brittle transition region is complicated by a large amount of data scatter. There are many available methods of analyzing transition region toughness data with the objective of reducing the data scatter and arriving at a representative value for the lower bound toughness. Ten 1T and five 4T compact specimens of SA508 C12 pressure vessel steel given a special heat treatment were tested in the transition region, and the data were analyzed according to six of the available methods. Of three purely statistical methods, one based on a large collection of pressure vessel and rotor steel data is preferred. Of three analytical methods, one which subtracts the contributions of plasticity and crack growth from measured toughness is preferred.

1.
Landes
,
J. D.
and
Shaffer
,
G. H.
, “
Statistical Characterization of Fracture in the Transition Region
,” in
Fracture Mechanics: Twelfth Conference
, ASTM STP 700,
American Society for Testing and Materials
,
Philadelphia
,
1980
, pp. 368–382.
2.
Iwadate
,
T.
,
Tanaka
,
Y.
,
Ono
,
S.
, and
Watanabe
,
J.
, “
An Analysis of Elastic-Plastic Fracture Toughness Behavior for JIc Measurement in the Transition Region
,” in
Elastic-Plastic Fracture: Second Symposium, Volume II—Fracture Resistance Curves and Engineering Applications
, ASTM STP 803,
Shih
C. F.
and
Gudas
J. P.
, Eds.,
American Society for Testing and Materials
,
Philadelphia
,
1983
, pp. II-531–561.
3.
Merkle
,
J. G.
, “
An Examination of the Size Effects and Scatter Observed in Small-Specimen Cleavage Fracture Toughness Testing
,” ORNL Report TM-9088, NUREG CR-3672,
1984
.
4.
Rosenfield
,
A. R.
and
Shetty
,
D. K.
, “
Cleavage Fracture of Steel in the Upper Ductile-Brittle Transition Region
,”
Engineering Fracture Mechanics
, Vol.
17
, No.
5
,
1983
, pp. 461–470.
5.
Watanabe
,
J.
,
Iwadate
,
T.
,
Tanaka
,
Y.
,
Yokobori
,
T.
, and
Ando
,
K.
, “
Fracture Toughness in the Transition Region
,”
Journal of Engineering Fracture Mechanics
, (in press).
6.
Bryan
,
R. H.
 et al
, “
Pressurized-Thermal-Shock Test of 6-in.-Thick Pressure Vessels. PTSE-1: Investigation of Warm Prestressing and Upper-Shelf Arrest
,” ORNL Report 6135, NUREG CR-4106,
1985
.
7.
Domian
,
H. A.
, “
Vessel V-7 and V-8 Repair and Characterization of Insert Material
,” ORNL Report 82-52845-1, NUREG CR-3771,
1984
.
8.
Anderson
,
T. L.
and
Stienstra
,
D.
, “
A Model to Predict the Sources and Magnitude of Scatter in Toughness Data in the Transition Region
,”
Journal of Testing and Evaluation
 0090-3973,(in press).
9.
Doig
,
P.
, “
Evaluation of Lower-Bound Fracture Toughness Values using Weibull Analysis of Single Specimen Data
,”
Engineering Fracture Mechanics
, Vol.
21
, No.
5
,
1985
, pp. 963–987.
10.
Anderson
,
T. L.
, “
A Combined Statistical/Constraint Model for the Ductile-Brittle Transition Region
,”
Third National Symposium on Nonlinear Fracture Mechanics
, 6–8 Oct. 1986,
Knoxville, TN
.
11.
Wallin
,
K.
, “
The Scatter in JIc Results
,”
Engineering Fracture Mechanics
, Vol.
21
, No.
5
,
1985
, pp. 963–987.
12.
Merkle
,
J. G.
, “
Evidence Concerning Crack Tip Constraint and Strain Rate Effects in Fracture Toughness Testing
,”
Third National Symposium on Nonlinear Fracture Mechanics
, 6–8 Oct. 1986,
Knoxville, TN
.
13.
Seidl
,
W.
, “
Specimen Size Effects on the Determination of KIc-Values in the Range of Elastic-Plastic Material Behavior
,”
Engineering Fracture Mechanics
, Vol.
12
,
1979
, pp. 581–597.
14.
Irwin
,
G. R.
, “
Fracture Mode Transition for a Crack Traversing a Plate
,”
Journal of Basic Engineering
 0021-9223, Vol.
82
,
1968
, pp. 417–425.
15.
Wallin
,
K.
, “
The Size Effect in KIc Results
,”
Engineering Fracture Mechanics
, Vol.
22
, No.
1
,
1985
, pp. 149–163.
16.
Macdonald
,
B. D.
,
Knolls Atomic Power Laboratory
, private communication,
01
1989
.
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