Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 460, Issue 1-2, Pages 472-477Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2007.05.085
Keywords
Al-7Si-0.3Mg alloy; calcium; strontium; modification
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The modification effect of Ca on the structure and properties of Al-7Si-0.3Mg alloy has been investigated and compared with the well-known modifier, Sr. The optimum level of Ca for achieving modification and best mechanical properties lies in the range of 0.0085-0.017%. Higher amount of Ca than this level leads to the formation of higher porosity and Al-Ca-Si intermetallics. Sr shows more porosity than Ca at 0.018% level in the alloy. The properties obtained with Ca modification are at par with those obtained with the well-known modifier, Sr. (C) 2007 Elsevier B.V. All rights reserved.
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