Refining grain structure and porosity of an aluminium alloy with intensive melt shearing

Intensive melt shearing was achieved using a twin-screw machine to condition an aluminium alloy prior to solidification. The results show that intensive melt shearing has a significant grain-refining effect. In addition, the intensive melt shearing reduces both the volume fraction and the size of po...

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Bibliographic Details
Published inScripta materialia Vol. 64; no. 2; pp. 209 - 212
Main Authors Zuo, Y., Li, H., Xia, M., Jiang, B., Scamans, G.M., Fan, Z.
Format Journal Article
LanguageEnglish
Published 01.01.2011
Subjects
Aluminum base alloys
Density
Grain structure
Melts
Porosity
Refining
Shearing
Solidification
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Summary:Intensive melt shearing was achieved using a twin-screw machine to condition an aluminium alloy prior to solidification. The results show that intensive melt shearing has a significant grain-refining effect. In addition, the intensive melt shearing reduces both the volume fraction and the size of porosity. It can reduce the density index from 10.50% to 2.87% and the average size of porosity in the samples solidified under partial vacuum from around 1mm to 100I14m.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
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ISSN:1359-6462
DOI:10.1016/j.scriptamat.2010.09.046