The role of oxides in the formation of primary iron intermetallics in an Al-11.6Si-0.37Mg Alloy
Data(s) |
01/12/2006
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Resumo |
Recent research suggest that the iron-rich intermetallic phases, such as alpha-FeAl15(Fe,Mn)(3)Si-2 and beta-Fe Al5FeSi, nucleate on oxide films entrained in aluminum casting alloys. This is evidenced by the presence of crack-like defects within these iron-rich intermetallics. In an attempt to verify the role of oxides in nucleating iron-rich intermetallics, experiments have been conducted under conditions where in-situ entrained oxide films and deliberately added oxide particles were present. Iron-rich intermetallics are observed to be associated with the oxides in the final microstructure, and crack-like defects are often observed in the beta-Fe plates. The physical association of the Fe-rich intermetallic phases with these solid oxides, either formed in situ or added, is in accordance with the mechanism suggesting that iron-rich intermetallics nucleate upon the wetted sides of double oxide films. |
Identificador | |
Idioma(s) |
eng |
Publicador |
Elsevier SA |
Palavras-Chave | #Materials Science, Multidisciplinary #C1 #291400 Materials Engineering #671004 Castings |
Tipo |
Journal Article |