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The stabilising effect of oxides in foamed aluminium alloy scrap

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<mark>Journal publication date</mark>1/09/2015
<mark>Journal</mark>International Journal of Materials Research
Issue number9
Volume106
Number of pages10
Pages (from-to)978-987
Publication StatusPublished
<mark>Original language</mark>English

Abstract

The expansion and stability of foams made from remelted aluminium alloy scrap has been studied. Foams made from scrap alloy contain oxide bi-films introduced from the swarf (machining chips and turnings) of LM26 alloy and these oxides act as stabilizing agents. The wettability of the oxides and hence the stabilisation is studied by varying the addition of Mg (0 to 2 wt. in the alloy. The viscosity of the melts with and without Mg addition is measured and correlated with foam expansion and stability. A detailed microstructural analysis of the base alloy and foam cell wall was conducted to obtain an understanding of the stabilisation behaviour of oxides.