TY - JOUR
T1 - Fatigue strength characteristics evaluation of SUH660 considering small fatigue crack propagation behavior and hardness distribution
AU - Wu, Hao
AU - Hamada, Shigeru
AU - Noguchi, Hiroshi
N1 - Funding Information:
This study was conducted as a part of the “Fundamental Research Project on Advanced Hydrogen Science (2006–2012)” funded by the New Energy and Industrial Technology Development Organization (NEDO). The authors gratefully acknowledge the support of the International Institute for Carbon Neutral Energy Research (WPI-I2CNER), sponsored by the Japanese Ministry of Education, Culture, Sports, Science and Technology.
PY - 2014/6
Y1 - 2014/6
N2 - The fundamental characteristics of SUH660, which a precipitation- strengthened stainless steel, were investigated by tensile, fatigue, and Vickers hardness tests. Owing to the observed crack propagation mechanisms, the S-N diagram had two "fatigue limits": the fatigue strength at 10 7 cycles and the safe side of the fatigue limit based on the threshold of PSB crack propagation. There was significant variability between the Vickers hardness distributions of the test zones, which indicated the existence of high and low hardness zones in a single specimen. It was observed that more cracks were initiated and propagated in the low hardness zone than in the high hardness zone. Therefore, the fatigue strength of SUH660 steel is low compared to its high tensile strength.
AB - The fundamental characteristics of SUH660, which a precipitation- strengthened stainless steel, were investigated by tensile, fatigue, and Vickers hardness tests. Owing to the observed crack propagation mechanisms, the S-N diagram had two "fatigue limits": the fatigue strength at 10 7 cycles and the safe side of the fatigue limit based on the threshold of PSB crack propagation. There was significant variability between the Vickers hardness distributions of the test zones, which indicated the existence of high and low hardness zones in a single specimen. It was observed that more cracks were initiated and propagated in the low hardness zone than in the high hardness zone. Therefore, the fatigue strength of SUH660 steel is low compared to its high tensile strength.
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U2 - 10.1016/j.ijfatigue.2013.12.011
DO - 10.1016/j.ijfatigue.2013.12.011
M3 - Article
AN - SCOPUS:84898006164
SN - 0142-1123
VL - 63
SP - 1
EP - 11
JO - International Journal of Fatigue
JF - International Journal of Fatigue
ER -