TY - JOUR
T1 - On the (in)adequacy of the Charpy impact test to monitor irradiation effects of ferritic/martensitic steels
AU - Chaouadi, Rachid
A2 - Maes, Dirk
N1 - Score = 10
PY - 2007/2/1
Y1 - 2007/2/1
N2 - Eurofer-97, Irradiation embrittlement studies rely very often on Charpy impact data, in particular the ductile-to-brittle transition temperature (DBTT). However, while the DBTT-shift is equivalent to the increase of the fracture toughness transition temperature of ferritic steels, it is not the case for ferritic/martensitic steels. The aim of this study is to critically assess experimental data obtained on a 9%Cr–ferritic/martensitic steel, Eurofer-97, to better understand the underlying mechanisms involved during the fracture process. More specifically, a dedicated analysis using the load diagram approach allows to unambiguously reveal the actual effects of irradiation on physically rather than empirically based parameters. A comparison is made between a ferritic and ferritic/martensitic steel to better identify the possible similarities and differences. Tensile, Charpy impact and fracture toughness tests data are examined in a global approach to assess the actual rather than apparent irradiation effects. The adequacy or inadequacy of the Charpy impact test to monitor irradiation effects is extensively discussed.
AB - Eurofer-97, Irradiation embrittlement studies rely very often on Charpy impact data, in particular the ductile-to-brittle transition temperature (DBTT). However, while the DBTT-shift is equivalent to the increase of the fracture toughness transition temperature of ferritic steels, it is not the case for ferritic/martensitic steels. The aim of this study is to critically assess experimental data obtained on a 9%Cr–ferritic/martensitic steel, Eurofer-97, to better understand the underlying mechanisms involved during the fracture process. More specifically, a dedicated analysis using the load diagram approach allows to unambiguously reveal the actual effects of irradiation on physically rather than empirically based parameters. A comparison is made between a ferritic and ferritic/martensitic steel to better identify the possible similarities and differences. Tensile, Charpy impact and fracture toughness tests data are examined in a global approach to assess the actual rather than apparent irradiation effects. The adequacy or inadequacy of the Charpy impact test to monitor irradiation effects is extensively discussed.
KW - Charpy impact
KW - load diagram
KW - ferritic/martensitic steels
KW - DBTT
KW - fracture toughness
KW - irradiation
UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/ezp_85052
UR - http://knowledgecentre.sckcen.be/so2/bibref/4672
U2 - 10.1016/j.jnucmat.2006.08.025
DO - 10.1016/j.jnucmat.2006.08.025
M3 - Article
SN - 0022-3115
VL - 360
SP - 75
EP - 91
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
IS - 2
ER -