About this Abstract |
Meeting |
5th International Congress on 3D Materials Science (3DMS 2021)
|
Symposium
|
5th International Congress on 3D Materials Science (3DMS 2021)
|
Presentation Title |
Three-dimensional Electron Backscatter Diffraction Analysis of Fatigue Crack Propagation in Steel |
Author(s) |
Mayuko Kikuzuki, Takanori Kato, Taizo Makino, Yukihiko Kimura |
On-Site Speaker (Planned) |
Mayuko Kikuzuki |
Abstract Scope |
Resistance against crack propagation is dominant effective in improving fatigue strength in steel. Identifying the behavior of non-propagating fatigue crack tip which stop growing during cyclic stress test reveals the factors inhibiting fatigue cracks. The conventional cross-sectional observations around the cracks have been performed; however, it was difficult to determine the crystal orientation of the fracture surfaces of fatigue crack tip from such 2D observation.
In this study, 3D electron backscatter diffraction (3D-EBSD) analysis using a focused ion beam scanning electron microscope (FIB-SEM) visualized the distribution of crystal grains and the primary crystal orientation of the fracture surface around the non-propagating fatigue crack tip in a ferritic model steel. The result shows that the fatigue crack propagated on the three planes of equivalent {101} slip planes in the steel, and fatigue crack tip stopped not at grain boundary but inner grain. |
Proceedings Inclusion? |
Definite: Other |