TY - JOUR
T1 - Small specimen test technology for evaluation of fatigue properties of fusion structural materials
AU - Hirose, T.
AU - Tanigawa, H.
AU - Ando, M.
AU - Kohyama, A.
AU - Katoh, Y.
AU - Jitsukawa, S.
PY - 2001
Y1 - 2001
N2 - Fatigue tests of ferritic/martensitic steels for fusion reactor application were carried out at room temperature using mini-sized and full-sized hourglass type fatigue specimens, as the basic study of small specimen testing techniques, which are indispensable for the effective use of the limited volumes of material testing reactor and proposed intense neutron sources. The FIB micro-sampling technique was applied to make the cross sectional thin foil specimen from the fatigue crack tip nearby the fractured surface. Effects of specimen size on fatigue properties, such as lifetime, plastic strain range and stress range, were not significant in the specimens used. TEM examination around the crack tip revealed original martensitic lath structure had changed to polygonization-like-structure and fatigue crack had been initiated along pre-austenite grain boundary.
AB - Fatigue tests of ferritic/martensitic steels for fusion reactor application were carried out at room temperature using mini-sized and full-sized hourglass type fatigue specimens, as the basic study of small specimen testing techniques, which are indispensable for the effective use of the limited volumes of material testing reactor and proposed intense neutron sources. The FIB micro-sampling technique was applied to make the cross sectional thin foil specimen from the fatigue crack tip nearby the fractured surface. Effects of specimen size on fatigue properties, such as lifetime, plastic strain range and stress range, were not significant in the specimens used. TEM examination around the crack tip revealed original martensitic lath structure had changed to polygonization-like-structure and fatigue crack had been initiated along pre-austenite grain boundary.
KW - Low cycle fatigue
KW - Microstructure
KW - Phase stability
KW - Reduced activation ferritic/martensitic steel
KW - Small specimen test technology
UR - http://www.scopus.com/inward/record.url?scp=0035014913&partnerID=8YFLogxK
U2 - 10.2320/matertrans.42.389
DO - 10.2320/matertrans.42.389
M3 - Article
AN - SCOPUS:0035014913
SN - 1345-9678
VL - 42
SP - 389
EP - 392
JO - Materials Transactions
JF - Materials Transactions
IS - 3
ER -
