Abstract
Effects of four different pre-treatments including annealing, deformation, dual aging, RRA on Al-Zn-Mg-Cu alloy in ECAP have been described. The results show that the annealed alloy at room temperature can only be pressed two passes, while the other alloys are seriously cracked after pressing first pass in ECAP. In addition, the annealed alloy can be pressed many passes with annealing at 523 K, in which the grain size is obviously refined and gradually evolved into equaixed grain with increasing in ECAP passes, however, the refinement of grain size is greatly decreased after eight passes, and the equivalent true strain reaches up to 6.2 after 10 passes with the equaixed grain of about 0.8 μm in size. The hardness of annealed alloy is increased with increasing passes, showing a quantitative relationship.
| Original language | English |
|---|---|
| Pages (from-to) | 268-271 |
| Number of pages | 4 |
| Journal | Tezhong Zhuzao Ji Youse Hejin/Special Casting and Nonferrous Alloys |
| Volume | 28 |
| Issue number | 4 |
| Publication status | Published - 2008 |
Keywords
- AI-Zn-Mg-Cu alloy
- ECAP
- Grain refinement
- Pre-treatment