The influence of ternary Cu additions on the nucleation of eutectic grains in a hypoeutectic Al-10 wt.%Si alloy

Darlapudi, A., McDonald, S. D. and StJohn, D. H. (2015) The influence of ternary Cu additions on the nucleation of eutectic grains in a hypoeutectic Al-10 wt.%Si alloy. Journal of Alloys and Compounds, 646 699-705. doi:10.1016/j.jallcom.2015.05.223


Author Darlapudi, A.
McDonald, S. D.
StJohn, D. H.
Title The influence of ternary Cu additions on the nucleation of eutectic grains in a hypoeutectic Al-10 wt.%Si alloy
Journal name Journal of Alloys and Compounds   Check publisher's open access policy
ISSN 0925-8388
1873-4669
Publication date 2015-10
Year available 2015
Sub-type Article (original research)
DOI 10.1016/j.jallcom.2015.05.223
Open Access Status Not Open Access
Volume 646
Start page 699
End page 705
Total pages 7
Place of publication Amsterdam, The Netherlands
Publisher Elsevier
Collection year 2016
Language eng
Formatted abstract
The Influence of the ternary alloying element Cu on eutectic nucleation in an Al-10 wt.%Si alloy in unmodified and Sr-modified conditions was studied. Cu additions had a relatively minor effect on the unmodified eutectic nucleation frequency. In Sr-modified Al–Si alloys where the nucleation frequency of the eutectic grains is very low compared to the unmodified alloys, the addition of Cu significantly increased the nucleation frequency. Further increases in the Cu concentration resulted in a continuous increase in the number of eutectic grains and an associated decrease in their size. It is proposed that constitutional supercooling plays an important role in promoting the nucleation of eutectic grains ahead of the solidifying interface especially in the case of Sr-modified Al–Si alloys.
Keyword Eutectic solidification
Aluminium silicon alloys
Ternary alloys
Eutectic grain nucleation
Porosity Formation
Aluminum alloys
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
Official 2016 Collection
 
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