Abstract
Local cyclic slip behavior around an oblique fatigue crack tip in single-crystalline Fe-3.2 wt.% Si alloy is precisely observed by using cross-sectional transmission electron microscopy (TEM). The observation successfully reveals the existence of different dislocation structures (vein, ladder, labyrinth, cell) around the crack tip. The results clearly suggest that the crack growth is strongly related to the formation of dislocation cell structures. Additional fractographic observation suggests that the crack growth, the path of which is found to be the boundary between hard cell region and soft matrix, accompanies the formation of striation pattern along the boundary.
| Original language | English |
|---|---|
| Pages (from-to) | 251-253 |
| Number of pages | 3 |
| Journal | Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A |
| Volume | 76 |
| Issue number | 762 |
| DOIs | |
| Publication status | Published - Feb 2010 |
| Externally published | Yes |
Keywords
- Cell
- Dislocation structures
- Fatigue
- Growth process
- Iron-silicon alloy
- Oblique crack
- Single crystal
- Striation
- TEM
ASJC Scopus subject areas
- Materials Science(all)
- Mechanics of Materials
- Mechanical Engineering