February 15, 2024
Journal Article
Influence of carbon nanotubes on microstructure and corrosion performance of additively manufactured 316L stainless steel
Abstract
Laser powder bed fusion (LPBF) was performed on feedstock-modified 316L stainless steel powder with 1 and 2 vol% carbon nanotubes (CNT). The pitting corrosion resistance was evaluated following potentiodynamic polarization tests conducted in 0.6 M NaCl at room temperature, 35 and 50 ?, and immersion tests in 6 % FeCl3. The CNT addition has significantly enhanced the corrosion resistance of LPBF printed 316L by refining Mn-Si-O nano inclusions from ~45 to ~15 nm and segregation of chromium around the inclusions. The enhanced corrosion resistance was correlated with the altered microstructure due to CNT addition.Published: February 15, 2024