Abstract
The flow behavior of isothermally compressed 7A09 aluminum alloy in the deformation temperature range from 633 to 733 K, the strain rate range from 0.01 to 10.0 s-1 and the maximum deformation of 60% was investigated on a Gleeble-1500 isothermal compressor. Meanwhile, a flow stress model considering the contribution of the strain was established in the isothermal compression of 7A09 aluminum alloy. The results show that the flow stress of 7A09 aluminum alloy significantly decreases with the increase of the deformation temperature and the decrease of strain rate. After a critical value of strain, the flow stress changes differently with the increase of the strain at higher and lower strain rates. The maximum and the average differences between the calculated flow stress by the flow stress model and the experimental ones are 7.77% and 2.69%, respectively. The comparison between the present flow stress model and that without considering the strain shows that the present flow stress model has higher precision and can efficiently predict the flow behavior in the isothermal compression of 7A09 aluminum alloy. The present flow stress model is also beneficial to the FEM simulation of thermal deformation for 7A09 aluminum alloy.
| Original language | English |
|---|---|
| Pages (from-to) | 954-960 |
| Number of pages | 7 |
| Journal | Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals |
| Volume | 21 |
| Issue number | 5 |
| State | Published - May 2011 |
Keywords
- 7A09 aluminum alloy
- Flow stress
- Flow stress model
- Isothermal compression
- Strain