Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5015325 | International Journal of Fatigue | 2017 | 22 Pages |
Abstract
We proposed a generalized method to determine the transition crack length from a microstructurally small to a microstructurally large crack growth, l0. Artificial errors are minimized in the data analysis process of the proposed method. In this study, we used low carbon steel specimens, each with eight micro notches (the ferrite grain size was 25 μm). The micro notches were introduced by focused ion beam technique, which is regarded as pre-cracks in steel. The obtained l0 (188 μm) agrees with previous studies. With the present specimen geometry, l0 can be determined using two specimens-an approach that is much easier than conventional methods.
Related Topics
Physical Sciences and Engineering
Engineering
Mechanical Engineering
Authors
Toshinobu Omura, Motomichi Koyama, Yasuaki Hamano, Kaneaki Tsuzaki, Hiroshi Noguchi,