Abstract
The solid-state structural modification technique friction-stir-processing (FSP) was applied on the surface of a laser-powder-bed-fusion fabricated AlSi10Mg alloy to locally modify the microstructure and enhance the corrosion properties of the alloy. A uniform microstructure was formed after FSP, comprised of a homogenous distribution of the Si-particles embedded in an Al-matrix with an ultrafine-grained structure containing a low fraction of subgrains, and reduced porosity level. This structure offers improved corrosion properties, ascribed to the formation of a thicker passive layer with a lower donor density on the FSPed regions as compared to the as-fabricated metal.
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