Abstract
This paper focused on the fatigue crack growth behavior of TC4-DT titanium alloy with different lamellar microstructures. Heat treatments were performed in order to prepare different microstructures with α lamella width and colony size. The results show that on the premise to guarantee adequate mechanical properties, the microstructures formed through air cooling from the β-phase field present better ability to resist fatigue crack propagation. This is attributed to the existing of bigger plastic deformation field in crack tip. It is also found that wide α lamellae and coarse α colony are beneficial to improve fracture toughness and resistance to fatigue crack propagation.
| Original language | English |
|---|---|
| Pages (from-to) | 277-281 |
| Number of pages | 5 |
| Journal | Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering |
| Volume | 44 |
| Issue number | 2 |
| State | Published - 1 Feb 2015 |
Keywords
- Fatigue crack propagation
- Lamellar microstructure
- TC4-DT titanium alloy