Abstract
The liquid metal-induced embrittlement (LME) of 7075 aluminum alloy was investigated by using a special constant deflection device. The change in dislocation configuration ahead of a loaded crack tip for 7075 aluminum alloy before and after adsorping of Hg+3%Ga atoms, and the initiation of liquid metal-induced microcrack have been observed in TEM. The results showed that chemisorption of liquid metal atoms could facilitate dislocation emission, multiplication and motion. When the chemisorption-facilitating dislocation emission and motion reach to a critical condition, a microcrack will initiate in dislocation free zone (DFZ) or at the crack tip, and propagate in cleavage mode.
| Original language | English |
|---|---|
| Pages (from-to) | 1021-1027 |
| Number of pages | 7 |
| Journal | Jinshu Xuebao/Acta Metallurgica Sinica |
| Volume | 34 |
| Issue number | 10 |
| Publication status | Published - Oct 1998 |
| Externally published | Yes |
ASJC Scopus Subject Areas
- Geotechnical Engineering and Engineering Geology
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
Keywords
- 7075 aluminum alloy
- Dislocation emission
- Dislocation motion
- Liquid metal-induced embrittlement (LME)
- TEM