The effect of lithium on the microstructure and morphology of Fe-rich intermetallic compounds in 360 cast alloy

N. Nasiri*, M. Emamy, M. Bigdeli

*Corresponding author for this work

Research output: Contribution to journalConference paper

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 languageEnglish
Pages (from-to)1782-1787
Number of pages6
JournalAdvanced Materials Research
Volume264-265
DOIs
Publication statusPublished - 2011
Externally publishedYes
EventInternational Conference on Advances in Materials and Processing Technologies, AMPT 2009 - , Malaysia
Duration: 26 Oct 200929 Oct 2009

Keywords

  • 360 aluminum alloy
  • Fe-containing intermetallics
  • Lithium

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