Abstract
The fatigue performance of 2524-T34 sheets was studied by four-point bend fatigue test. The fatigue crack initiation and propagation behavior were observed by optical microscopy and scanning electron microscopy. The results indicate that 2524 alloy shows superior fatigue properties. The fatigue strength is up to 80% of the yield strength. The fatigue crack mainly initiates from the second phase particles and the interface between the second phase particles and matrix. The crack plane deflection in the process of crack propagation relates to the resistance of the grain boundary. The difference of crystallographic orientation between the two favoured slip planes within the two neighboring grains is an important factor to control crack propagation across a grain boundary.
| Original language | English |
|---|---|
| Pages (from-to) | 37-42 |
| Number of pages | 6 |
| Journal | Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals |
| Volume | 20 |
| Issue number | 1 |
| State | Published - Jan 2010 |
Keywords
- 2524 alloy
- Fatigue crack
- Initiation
- Microstructure
- Propagation
ASJC Scopus subject areas
- Condensed Matter Physics
- Metals and Alloys
- Materials Chemistry