A recent paper in npj Materials Degradation explores the origins of localized corrosion in additively manufactured (AM) stainless steel. The results show that the metastable cellular structures unique to AM lead to intricate localized corrosion, which shape is completely correlated with the crystallographic orientation. This work was supervised by Dr. Marie A. Charpagne (Assistant Professor at the Department of Materials Science and Engineering). The experimental efforts were led by master’s student Evan DelVecchio, assisted by undergraduate student Tiffany Liu. Dr. Maryam Eslami, Staff Research Scientist at ARI, collaborated with the team regarding the electrochemical measurements, analysis of the data and drafting the manuscript.
The figure to the right shows examples of localized corrosion pits: a. rounded pit spanning across multiple grain boundaries, b. fully grown elongated pit with rugged edges.