Abstract
Effects of the isothermal temperature and holding time on the microstructural morphology and grain size have been investigated during partial remelting of the semisolid Al-4Cu-Mg alloy. The mechanism of microstructural evolution has been discussed in the paper. The experimental results show that the α grains coarsen gradually and become more globular with an increase of the isothermal temperature and holding time. For the Al-4Cu-Mg alloy, the optimal process parameters include the isothermal temperature range from 540°C to 580°C and below holding time of 10 min. The coalescence of grains and Ostwald ripening theory are two main mechanisms of the grain coarsening during partial remelting, which plays an important role at different liquid fraction.
| Original language | English |
|---|---|
| Pages (from-to) | 82-86 |
| Number of pages | 5 |
| Journal | Suxing Gongcheng Xuebao/Journal of Plasticity Engineering |
| Volume | 14 |
| Issue number | 4 |
| State | Published - Aug 2007 |
Keywords
- Al-4Cu-Mg alloy
- Mechanism
- Microstructural evolution
- Partial remelting