TY - GEN
T1 - Applicability of a FIB-notch as a small initial crack for fatigue limit evaluation
AU - Sakamoto, Junji
AU - Takahashi, Yoshimasa
AU - Noguchi, Hiroshi
PY - 2012
Y1 - 2012
N2 - In this study, we propose a method for assessing the applicability of an artificial defect as a small initial crack for fatigue limit evaluation. The proposed method is applied to drill holes and sharp notches introduced using a focused ion beam (FIB) technique in annealed 0.45% carbon steel. It is found that under rotating bending fatigue, an FIB notch can be used as a small initial crack for fatigue limit evaluation, whereas a drill hole cannot, for of ∼50 μm. Here, is the square root of the area obtained by projecting the defect onto a plane perpendicular to the load axial direction. The results indicate that an FIB notch can be used as a small initial crack for fatigue limit evaluation in a greater number of materials than those in which a drill hole can be used.
AB - In this study, we propose a method for assessing the applicability of an artificial defect as a small initial crack for fatigue limit evaluation. The proposed method is applied to drill holes and sharp notches introduced using a focused ion beam (FIB) technique in annealed 0.45% carbon steel. It is found that under rotating bending fatigue, an FIB notch can be used as a small initial crack for fatigue limit evaluation, whereas a drill hole cannot, for of ∼50 μm. Here, is the square root of the area obtained by projecting the defect onto a plane perpendicular to the load axial direction. The results indicate that an FIB notch can be used as a small initial crack for fatigue limit evaluation in a greater number of materials than those in which a drill hole can be used.
KW - Fatigue crack growth
KW - Fatigue limit
KW - Initial small crack
KW - Non-propagating crack
KW - Reproducibility
UR - http://www.scopus.com/inward/record.url?scp=85127226788&partnerID=8YFLogxK
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M3 - Conference contribution
AN - SCOPUS:85127226788
SN - 978-5-905576-18-8
T3 - 19th European Conference on Fracture: Fracture Mechanics for Durability, Reliability and Safety, ECF 2012
BT - 19th European Conference on Fracture
PB - European Conference on Fracture, ECF
T2 - 19th European Conference on Fracture: Fracture Mechanics for Durability, Reliability and Safety, ECF 2012
Y2 - 26 August 2012 through 31 August 2012
ER -