TY - GEN
T1 - Use of Miniaturized Compact Tension Specimens for Fracture Toughness Measurements in the Upper Shelf Regime
AU - Lucon, Enrico
AU - Scibetta, Marc
AU - Chaouadi, Rachid
AU - van Walle, Eric
N1 - Score = 1
PY - 2008/1
Y1 - 2008/1
N2 - In the nuclear field, the importance of direct fracture toughness measurements on RPV materials has been nowadays widely recognized, as opposed to Charpy-based estimations. However, sample dimensions have to be kept small in order to optimize the use of available material (often in the form of previously broken Charpy specimens) or, in the case of new irradiations, make effective use of the limited space available inside irradiation facilities. One of the most appealing geometries for fracture toughness measurements is the miniature Compact Tension specimen, MC(T), which has the following dimensions: B = 4.15 mm, W = 8.3 mm, cross section 10 × 10 mm². Four MC(T) specimens can be machined out of a broken half Charpy, and in the case of irradiation ten MC(T) samples occupy approximately the same volume as a full-size Charpy specimen. A comprehensive investigation is presented in this paper, aimed at assessing the applicability of MC(T) specimens to measure fracture toughness in fully ductile (upper shelf) conditions. In this study, 18 1TC(T) and 20 MC(T) specimens have been tested at different temperatures from three RPV steels and one low-alloy C-Mn steel.
AB - In the nuclear field, the importance of direct fracture toughness measurements on RPV materials has been nowadays widely recognized, as opposed to Charpy-based estimations. However, sample dimensions have to be kept small in order to optimize the use of available material (often in the form of previously broken Charpy specimens) or, in the case of new irradiations, make effective use of the limited space available inside irradiation facilities. One of the most appealing geometries for fracture toughness measurements is the miniature Compact Tension specimen, MC(T), which has the following dimensions: B = 4.15 mm, W = 8.3 mm, cross section 10 × 10 mm². Four MC(T) specimens can be machined out of a broken half Charpy, and in the case of irradiation ten MC(T) samples occupy approximately the same volume as a full-size Charpy specimen. A comprehensive investigation is presented in this paper, aimed at assessing the applicability of MC(T) specimens to measure fracture toughness in fully ductile (upper shelf) conditions. In this study, 18 1TC(T) and 20 MC(T) specimens have been tested at different temperatures from three RPV steels and one low-alloy C-Mn steel.
KW - Ductile fracture toughness measurement
KW - miniature Compact Tension specimen
KW - ductile tearing initiation
KW - J-R curve
KW - work hardening
KW - loss of constraint
UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/ezp_85488
UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/ezp_85488_2
UR - http://knowledgecentre.sckcen.be/so2/bibref/4745
M3 - In-proceedings paper
SN - 978-0-8031-3406-5
VL - 1
T3 - Special Tecnical Publication (STP)
SP - 374
EP - 389
BT - Fatigue & Fracture Mechanics - 35th Volume
CY - West Conshohocken, PA, United States
T2 - 35th ASTM Symposium on Fatigue & Fracture Mechanics
Y2 - 18 May 2005 through 20 May 2005
ER -