TY - JOUR
T1 - Radiation effects on low cycle fatigue properties of reduced activation ferritic/martensitic steels
AU - Hirose, T.
AU - Tanigawa, H.
AU - Ando, M.
AU - Kohyama, A.
AU - Katoh, Y.
AU - Narui, M.
PY - 2002/12
Y1 - 2002/12
N2 - The reduced activation ferritic/martensitic steel, RAFs F82H IEA heat has been fatigue-tested at ambient temperature under diametral strain controlled conditions. In order to evaluate the effects of radiation damage and transmutation damage on fatigue characteristics, post-neutron irradiation and post-helium ion implantation fatigue tests were carried out. Fracture surfaces and fatigue crack initiation on the specimen surface were observed by SEM. Low-temperature irradiation caused an increase in stress amplitude and a reduction in fatigue lifetime corresponding to radiation hardening and loss of ductility. Neutron irradiated samples showed brittle fracture surface, and it was significant for large strain tests. On the other hand, helium implantation caused delay of cyclic softening. However, brittle crack initiation and propagation did not depend on the helium concentration profiles.
AB - The reduced activation ferritic/martensitic steel, RAFs F82H IEA heat has been fatigue-tested at ambient temperature under diametral strain controlled conditions. In order to evaluate the effects of radiation damage and transmutation damage on fatigue characteristics, post-neutron irradiation and post-helium ion implantation fatigue tests were carried out. Fracture surfaces and fatigue crack initiation on the specimen surface were observed by SEM. Low-temperature irradiation caused an increase in stress amplitude and a reduction in fatigue lifetime corresponding to radiation hardening and loss of ductility. Neutron irradiated samples showed brittle fracture surface, and it was significant for large strain tests. On the other hand, helium implantation caused delay of cyclic softening. However, brittle crack initiation and propagation did not depend on the helium concentration profiles.
UR - http://www.scopus.com/inward/record.url?scp=0347927301&partnerID=8YFLogxK
U2 - 10.1016/S0022-3115(02)01199-6
DO - 10.1016/S0022-3115(02)01199-6
M3 - Article
AN - SCOPUS:0347927301
SN - 0022-3115
VL - 307-311
SP - 304
EP - 307
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
IS - 1 SUPPL.
ER -