Abstract
Two-step aging behavior of an Al-10%Si-0.3%Mg alloy cast into permanent mold, rolled up to 68% and solution-treated was investigated by micro-vickers hardness measurement and transmission electron microscopy(TEM). In the case that final-aging temperature is relatively lower and the holding time in iced water is longer, negative effect of two-step aging was observed because the peak hardness in the final-aging stage was slightly decreased. Similar tendency was obtained in the case that the pre-aging temperature is increased to room temperature. On the other hand, pre-aging at 423 K for a relatively long time slightly increased the peak hardness in the final-aging stage with a shorter time to reach the peak hardness. Such a two-step aging behavior is considered due to the influence of precipitated phases such as clusters, G.P. zones, parallelogram-type and β″ in the matrix.
| Original language | English |
|---|---|
| Pages (from-to) | 55-60 |
| Number of pages | 6 |
| Journal | Keikinzoku/Journal of Japan Institute of Light Metals |
| Volume | 65 |
| Issue number | 2 |
| DOIs | |
| State | Published - 2015 |
Keywords
- Al-Si-Mg alloy
- Casting
- Precipitates
- Solution treatment
- Two-step aging
ASJC Scopus subject areas
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry