Abstract
The ageing precipitation and hardening behavior of 1973 high strength and high toughness aluminum alloy were studied by means of transmission electron microscopy (TEM), select area electron diffraction (SAED) and hardness measurements at different ageing temperatures. The results show that this alloy has obvious anti-over-aging capability at 120 and 140°C. And this alloy can keep the hardness of 195 HV in a long time after peak-ageing. Furthermore, the precipitation sequence of 1973 aluminum alloy can be described as follows: supersaturated solid solution (α) → GPI/GPII zone → metastable η'→ stable η→T phase. There are GPII zone and η' phase with the greatest strengthening effect on the 1973 aluminum alloy during the whole ageing process at 140°C.
| Original language | English |
|---|---|
| Pages (from-to) | 522-528 |
| Number of pages | 7 |
| Journal | Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals |
| Volume | 21 |
| Issue number | 3 |
| State | Published - Mar 2011 |
| Externally published | Yes |
Keywords
- 1973 aluminum alloy
- Ageing hardening
- Precipitation
- Precipitation sequence