Srirangam-Venkata, Surya Prakash, Chattopadhyay, S, Shibata, T, Kaduk, J A, Miller, J T, Segre, C U and Shankar, S (2009) XAFS studies on a modified Al-Si hypoeutectic alloy. Journal of Physics: Conference Series, 190 . 012068. doi:10.1088/1742-6596/190/1/012068 ISSN 1742-6596.

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Abstract

To understand the role of Sr in doped aluminium-silicon alloys, we have conducted for the first time, Sr- K edge XAFS measurements on Al-3%Si-0.04%Sr. Aluminium-Silicon alloys are widely used in automobile and aerospace applications. Modification of these alloys with addition of trace levels of Sr (200–400 ppm) results in changing the morphology of Si eutectic from "plate" like structure to "fibrous" structure. Several theories have been proposed to understand the mechanism of modification of eutectic phases with Sr addition in these alloys, but there is no conclusive evidence in support of these theories. From our XAFS analysis, we suggest Sr-Si bonds and Sr-Sr correlations may be responsible for the morphological transformation observed in the alloy.

Item Type:	Journal Article
Divisions:	Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group)
Journal or Publication Title:	Journal of Physics: Conference Series
Publisher:	Institute of Physics Publishing Ltd.
ISSN:	1742-6596
Official Date:	2009
Dates:	Date Event 2009 Published
Volume:	190
Page Range:	012068
DOI:	10.1088/1742-6596/190/1/012068
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access

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