Abstract: Additive manufacturing (AM) encompasses a range of production processes in which complex 3-dimensional components are fabricated in a layer-by-layer manner directly from a digital model. These processes involve the use of a powder feedstock and a high energy density source, such as a laser, to melt the feedstock. The AM process can provide a means for rapidly producing replacement parts and also has the potential to create new alloys and composites that were not previously possible with conventional processing methods. However, the differences in processing between conventional and AM parts lead to differences in the microstructure and morphology of the resulting components, even though they may be fabricated from the same alloy system. These corresponding microstructural differences can have a significant impact on the electrochemical and corrosion behavior of a traditional range of corrosion-resistant alloys, such as austenitic grade stainless steels (SS).
Authors: Barbara A. Shaw, Elizabeth Sikora, Dailin Wang, Todd A. Palmer,
and Mohamed Salman A. Kadhi
Keywords:Additive manufacturing, 316L stainless steel, corrosion, localized corrosion, electrochemical techniques, pitting, and crevice corrosion