Abstract
The effects of hydrogen-charged treatment on the biaxial cyclic deformation behavior and the fatigue lifetime of cold-worked Zr-4 have been investigated. The results show that the fatigue lifetime of hydrogenated Zr-4 under the cold-worked condition with CH =400 μg/g is better than that of the unhydrogenated one. Whereas, when CH = 580 μg/g, the fatigue lifetime of cold-worked hydrogenated Zr-4 alloy is lower than that of the unhydrogenated Zr-4 at the equivalent strain amplitudes (Δεeq = 0.8%) and the same phase angle (φ). Microstructure examination by means of TEM and optical microscope reveals that the improvement of fatigue lifetime for the hydrogenated Zr-4 alloy in the low hydrogen concentration can be attributed to the relieve of the residual stress during hydrogenating treatment at elevated temperature, which leads to the good abilities of plastic deformation and harmony with matrix for hydride formed in Zr-4.
| Original language | English |
|---|---|
| Pages (from-to) | 783-786 |
| Number of pages | 4 |
| Journal | Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering |
| Volume | 35 |
| Issue number | 5 |
| State | Published - May 2006 |
Keywords
- Cyclic deformation
- Dislocation
- Hydrogen-charged
- Non-proportional loading
- Proportional loading
- Zr-4