Abstract
A special deflection device for TEM has designed and used to study the dislocation configuration change before and after recharging hydrogen. The relations among hydrogen-facilitated microcrack initiation, dislocation motion and dislocation free zone (DFZ) were also studied. The results showed that hydrogen can promote dislocation emission and motion. When the dislocation emission and motion develop to a critical condition, hydrogen-facilitated microcrack will initiate in DFZ or at the top of the crack. This process is similar to that during tensile testing in the air.
| Original language | English |
|---|---|
| Pages (from-to) | 134-140 |
| Number of pages | 7 |
| Journal | Jinshu Xuebao/Acta Metallurgica Sinica |
| Volume | 34 |
| Issue number | 2 |
| Publication status | Published - Feb 1998 |
| Externally published | Yes |
ASJC Scopus Subject Areas
- Geotechnical Engineering and Engineering Geology
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
Keywords
- Dislocation emission and motion
- Hydrogen induced crack
- Rail steel
- TEM