Abstract
In this study, the effect of small additions of lithium on the microstructure and morphology of Fe-containing intermetallic compounds in A360 alloy has been investigated. Different Fe contents (1, 1.5 and 2%) were added into A360 alloy, and Li concentrations also varied from 0 to 0.5 wt. %. The image analysis results showed that, the maximum length of β-Al5FeSi plate in Li-modified specimens is changed significantly in comparison with non-modified ones. It is evident that the maximum reduction in the average length of Fe containing platelets occurs in specimens with 2% Fe. Also, the lowest changes in the length of intermetallic phases -as Fe content decreases- occur in the 0.5 wt% Li. At higher Li concentrations, the presence of Al-Li-Si intermetallics in the microstructure can provide undesirable condition. This intermetallic can be so damaging in mechanical properties especially in coarse shapes.
| Original language | English |
|---|---|
| Pages (from-to) | 1782-1787 |
| Number of pages | 6 |
| Journal | Advanced Materials Research |
| Volume | 264-265 |
| DOIs | |
| Publication status | Published - 2011 |
| Externally published | Yes |
| Event | International Conference on Advances in Materials and Processing Technologies, AMPT 2009 - , Malaysia Duration: 26 Oct 2009 → 29 Oct 2009 |
Keywords
- 360 aluminum alloy
- Fe-containing intermetallics
- Lithium