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ASTM Selected Technical Papers
Effects of Radiation on Materials: Sixteenth International Symposium
By
AE Kumar
AE Kumar
1
University of Missouri-Rolla
,
Rolla, MO
;
symposium chairman and editor
.
Search for other works by this author on:
DS Gelles
DS Gelles
2
Battelle Pacific Northwest Laboratory
,
Richland, WA
;
symposium cochairman and editor
.
Search for other works by this author on:
RK Nanstad
RK Nanstad
3
Oak Ridge National Laboratory
,
Oak Ridge, TN
;
symposium cochairman and editor
.
Search for other works by this author on:
TA Little
TA Little
4
Harwell Laboratory
,
Oxfordshire,
UK
;
symposium cochairman and editor
.
Search for other works by this author on:
ISBN-10:
0-8031-1488-5
ISBN:
978-0-8031-1488-3
No. of Pages:
1344
Publisher:
ASTM International
Publication date:
1994

Recent investigations have shown that the Charpy-V test is an unreliable indicator of the true irradiation embrittlement. This has increased the need for a direct measurement of the fracture toughness. In the case of surveillance testing, where the specimen size is typically small, especially two types of tests are attractive, static testing based on the J-integral and dynamic testing performed by the instrumented impact hammer. Many factors speak in favor for the dynamic test. However, it is not clear whether the irradiation embrittlement is depicted similarly by static and dynamic tests. In this work the the effect of loading rate upon irradiation embrittlement measured by fracture mechanical properties is investigated. It is shown that the shift in the fracture toughness transition temperature is smaller for dynamic loading than for static loading and a theoretical explanation for the effect is proposed.

1.
Wallin
,
K.
, “
A Simple Theoretical Charpy-V — Kc Correlation for Irradiation Embrittlement
, ” Innovative Approaches to Irradiation Damage, and Fracture Analysis, PVP - Vol.
170
,
The American Society of Mechanical Engineers, ASME
,
1989
, pp 93 – 100.
2.
Valo
,
M.
,
Wallin
,
K.
,
Törrönen
,
K.
, and
Ahlstrand
,
R.
, “
Irradiation Response of the New IAEA Correlation Monitor Material JRQ Measured by Fracture Mechanical Properties
,” 15th Symposium on Effects of Radiation on Materials, ASTM STP 1125,
1992
.
3.
Valo
,
M.
,
Wallin
,
K.
,
Törrönen
,
K.
, and
Ahlstrand
,
R.
, “
Irradiation Response of the IAEA CRP-3 Material FFA Measured by Fracture Mechanical Properties
,” IAEA Specialists Meeting on Nuclear Reactor Pressure Vessel Steels,
Balatonfüred, Hungary
, September 25–28, 1990,
International Atomic Energy Agency (IAEA)
.
4.
Manufacturing History and Mechanical Properties of Japanese Materials Provided for the International Atomic Energy Agency
,” CRP subcommittee report,
Atomic Energy Research Committee, Japan Welding Engineering Society
,
10
1986
, 270 p.
5.
Wallin
,
K.
,
Valo
,
M.
,
Rintamaa
,
R.
,
Törrönen
,
K.
and
Ahlstrand
,
R.
, “
Characteristics of the IAEA Correlation Monitor Material for Surveillance Programmes
,” Research Report 639,
Technical Research Centre of Finland
, Espoo, Finland,
1989
, 55 p.
6.
Rintamaa
,
R.
and
Zimmermann
,
C.
, “
Advanced instrumented impact testing facility for characterization of dynamic fracture behaviour
,”
Nuclear Engineering and Design
 0029-5493, Vol.
96
,
1986
, pp 159–166.
7.
Rintamaa
,
R.
, “
Evaluation of Dynamic Fracture Behaviour of Materials - Method Development and Application
,”
VTT Publication, Technical Research Centre of Finland
,
Espoo
,
1992
(to be published).
8.
Rintamaa
,
R.
,
Rahka
,
K.
,
Wallin
,
K.
,
Ikonen
,
K.
,
Talja
,
H.
,
Kotilainen
,
H.
and
Sirkkola
,
E.
, “
Instrumented impact testing machine with reduced specimen oscillation effects
,” VTT Research Report 290,
Technical Research Centre of Finland
, Espoo,
1984
, 44 p.
9.
Törrönen
,
K.
,
Aaltonen
,
P.
,
Hänninen
,
H.
,
Mäkelä
,
K.
,
Karjalainen-Roikonen
,
P.
,
Keinänen
,
H.
,
Kauppinen
,
P.
,
Rintamaa
,
R.
,
Talja
,
H.
,
Wallin
,
K.
, and
Valo
,
M.
, “
Overview of the Nuclear Power Plant Structural Integrity Research in Finland
,”
The International Journal of Pressure Vessels and Piping
, In Press,
1992
.
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