Microstructure and corrosion resistance of the AE42 commercial alloy processed by extrusion and rotary swaging were investigated. Microstructure characterization showed an increasing volume fraction of the rened grains with increasing stage of swaging processing. However, their presence was limited solely to the peripheral ring of 1 mm in all studied conditions of swaged material. Corrosion resistance investigation showed continuous decrease of polarization resistance that was attributed to the grain renement and insucient homogenization of the alloying elements during the swaging process.
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Minárik et al. (2015) studied this question.