Abstract
Wire-brushing was applied to surfaces of AZ31B Mg alloy sheets, and the microstructure, mechanical properties and corrosion resistance were investigated. A nanocrystalline surface layer, which consists of equiaxed nano-crystals, can be obtained by the wire-brushing. The mean grain size in the nanocrystalline layer depends on the condition, and the smallest mean grain size was 68.2nm. The grain size depends on the feed speed rather than pressing load. The proof stress and tensile strength slightly increased after the wire-brushing. Corrosion resistance of the Mg sheet significantly increased after the wire-brushing.
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