Abstract
The bars of TC21 alloy with 90mm in diameter were produced by α+β-and β-processing. The crack propagation rate and the fracture toughness of the bars were tested. The crack growth behaviour with the fine and coarse lamellar microstructures were characterized. The results showed that the material microstructure influenced the magnitude of crack propagation, and that the bar produced by β-processing had higher fracture toughness and a lower crack propagation rate. The thin microstructure showed a lower crack propagation rate compared with the coarser microstructure. The stationary state region of crack propagation developed forwards in the form of striation mechanism, many fatigue striations were observed by scan electronic microscopy.
| Original language | English |
|---|---|
| Pages (from-to) | 263 |
| Number of pages | 1 |
| Journal | Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering |
| Volume | 34 |
| Issue number | SUPPL. 3 |
| State | Published - Oct 2005 |
Keywords
- Bars
- Crack propagation rate
- Fracture toughness
- TC21