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An investigation of the behaviour of double oxide film defects in aluminium-magnesium cast alloys
Journal of the Southern African Institute of Mining and Metallurgy
Double oxide films (bifilms) are significant defects in light alloy castings that occur when, during melt handling, the oxidized surface of the melt is folded over onto itself and then entrained into the liquid metal, encapsulating a portion of the local atmosphere. These defects create crevices in the final castings and have been shown to decrease tensile and fatigue properties, and also to increase their scatter, making casting properties unreproducible and unreliable. This paper reports ondoi:10.17159/2411-9717/2018/v118n11a13 fatcat:ple75gpfyfd4dlbyivrn2azzei