TY - JOUR
T1 - Pre-strain effect on fatigue strength characteristics of SUH660 plain specimens
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 - 2013
Y1 - 2013
N2 - Precipitation particles in precipitation-strengthened materials are considered to be cut by pre-strain treatment, which affects the fatigue strength. In this study, fatigue tests were performed on precipitation- strengthened stainless steel SUH660 to investigate the effect of pre-strain on fatigue crack initiation and propagation characteristics. Fatigue test results showed that pre-strained specimens have a shorter fatigue crack propagation life compared to non-strained specimens; this is the opposite of results observed in carbon steel. The accelerated fatigue crack growth observed in pre-strained specimens was first assumed to be caused by precipitate cutting. A dislocation accumulation model for the fatigue crack tip in the precipitation-strengthened material was then suggested. Buff-polished specimens were also used for the fatigue tests, and the results showed that the work-hardened layer had a significant impact on the fatigue strength and fatigue life.
AB - Precipitation particles in precipitation-strengthened materials are considered to be cut by pre-strain treatment, which affects the fatigue strength. In this study, fatigue tests were performed on precipitation- strengthened stainless steel SUH660 to investigate the effect of pre-strain on fatigue crack initiation and propagation characteristics. Fatigue test results showed that pre-strained specimens have a shorter fatigue crack propagation life compared to non-strained specimens; this is the opposite of results observed in carbon steel. The accelerated fatigue crack growth observed in pre-strained specimens was first assumed to be caused by precipitate cutting. A dislocation accumulation model for the fatigue crack tip in the precipitation-strengthened material was then suggested. Buff-polished specimens were also used for the fatigue tests, and the results showed that the work-hardened layer had a significant impact on the fatigue strength and fatigue life.
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U2 - 10.1016/j.ijfatigue.2013.06.021
DO - 10.1016/j.ijfatigue.2013.06.021
M3 - Article
AN - SCOPUS:84884905376
SN - 0142-1123
VL - 55
SP - 291
EP - 298
JO - International Journal of Fatigue
JF - International Journal of Fatigue
ER -