TY - JOUR
T1 - Effect of specimen shape on micro-crack growth behavior under fatigue in reduced activation ferritic/martensitic steel
AU - Nogami, Shuhei
AU - Sato, Yuki
AU - Hasegawa, Akira
AU - Tanigawa, Hiroyasu
AU - Yamazaki, Masanori
AU - Narui, Minoru
N1 - Funding Information:
The experimental works in this study was carried out under the joint-use program of the International Research Center for Nuclear Materials Science, Institute for Materials Research, Tohoku University. This work was partly supported by the R&D of the IFERC and IFMIF/EVEDA projects in the BA (Broader Approach) activity.
PY - 2011/10/1
Y1 - 2011/10/1
N2 - The effect of specimen shape on the micro-crack growth behavior of F82H was investigated by the low cycle fatigue test at room temperature in air at the total strain range of 0.4-1.5% using three types of the miniature hourglass-type specimens with different stress concentration factors. In case of the high strain range conditions above 0.8%, almost no effect of the specimen shape on the fatigue life, micro-crack initiation life and the crack growth rate was observed. In case of the low strain range conditions below 0.6%, the effect of specimen shape on the fatigue life was observed. The fatigue life was considered to be dependent on the stress concentration factor. Based on the micro-crack growth analysis, the difference of the fatigue life under the low strain range conditions was attributed not to the crack growth rate but to the micro-crack initiation life dependent on the specimen shape.
AB - The effect of specimen shape on the micro-crack growth behavior of F82H was investigated by the low cycle fatigue test at room temperature in air at the total strain range of 0.4-1.5% using three types of the miniature hourglass-type specimens with different stress concentration factors. In case of the high strain range conditions above 0.8%, almost no effect of the specimen shape on the fatigue life, micro-crack initiation life and the crack growth rate was observed. In case of the low strain range conditions below 0.6%, the effect of specimen shape on the fatigue life was observed. The fatigue life was considered to be dependent on the stress concentration factor. Based on the micro-crack growth analysis, the difference of the fatigue life under the low strain range conditions was attributed not to the crack growth rate but to the micro-crack initiation life dependent on the specimen shape.
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U2 - 10.1016/j.jnucmat.2010.12.048
DO - 10.1016/j.jnucmat.2010.12.048
M3 - Article
AN - SCOPUS:80053610876
SN - 0022-3115
VL - 417
SP - 131
EP - 134
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
IS - 1-3
ER -