Abstract
Two additively manufactured (AM) materials, i.e., stainless steel 316 L (SS316L) and Ni-base superalloy Inconel 718 (IN718), have been exposed to MgCl2-KCl-NaCl (47.1–22.7–30.2 mol%) salts at 700 °C to investigate their corrosion behavior. Corrosion tests were conducted using SS316L processed by laser metal deposition (LMD), IN718 by laser powder bed fusion (PBF-LB) as well as conventionally processed counterparts. The obtained results reveal that LMD SS316L is characterized by inferior corrosion resistance, mainly due to the segregation of δ-ferrite at grain boundary (GB). Two different types of corrosion morphologies, uniform corrosion and GB-driven corrosion, are observed in both AM and the conventionally processed IN718 samples. The GB-driven corrosion is accelerated by the evolution of δ-phase in case of IN718.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
