Abstract
Keywords: solid-state recycling; AZ31B magnesium alloy; AZ91D magnesium alloy; microstructure; mechanical property. Abstract. The chips of AZ31B and AZ91D magnesium alloy were simultaneously recycled by solid -state process. For comparison, AZ91D and AZ31B magnesium alloy were produced by the same solid- state recycling from single AZ91 and AZ31 chip, respectively. Mechanical properties and microstructure of three recycled alloy were investigated. Recycled AZ31B and AZ91D alloy show small exquiaxed grain. In recycled alloy fabricated from two kinds of chips, AZ91 and AZ31 chips consolidate each other after being broken up during hot extruding, so the composition and microstructure of the recycled alloy are inhomogeneous. Original AZ31 part exhibits finer grain than AZ91 because more deformation concentrated in AZ31 chip during hot extruding and lead to a larger degree of dynamic recrystallization. The recycled alloy show good mechanical property, both the ultimate tensile strength and elongation to failure are intermediate at the ones of recycled AZ31B and AZ91D alloy.
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