Abstract

Aluminum composite pipes reinforced with stainless steel nets were fabricated in the following procedure. A mould core was first prepared by a graphite bar wrapped with both stainless steel nets and aluminum foils. Hollow shaped billets were made using a unidirectional solidification technique after pouring aluminum melt into the mould having the core. Then, the hollow shaped billets were extruded into composite pipes using a mandrel. Aluminum foils used with nets were useful for positioning nets, adjusting spacing between net layers and improving melt filling into billets. The original shape was maintained even after extrusion without failure. The torsional properties of the pipe were improved by adjusting the radial position of nets and by increasing the wrapping number of nets.

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