Abstract
Performance of commercial alloys can be improved greatly by severe plastic deformation, which refines grain of metals to several micrometer or sub-micrometer order. During severe plastic deformation, the final size of grain structure depends on the following factors: strain rate, total strain, deformation temperature and so on. Under a certain condition, structure cannot be infinitely refined, which means that the size of grain has a limit with the increase of total strain. Under conventional hot deformation temperature, the grain size of 7075 aluminum alloy can be refined to 1-2 μm, and it will not become smaller with the increase of total strain, that is to say, the limit of grain refinement is about 1 μm.
| Original language | English |
|---|---|
| Pages (from-to) | 645-648 |
| Number of pages | 4 |
| Journal | Transactions of Nonferrous Metals Society of China (English Edition) |
| Volume | 13 |
| Issue number | 3 |
| State | Published - Jun 2003 |
| Externally published | Yes |
Keywords
- 7075 aluminum alloy
- Deformation refinement
- Ultra-fine grains