Materials & Design | |
On the pitting corrosion of 2205 duplex stainless steel produced by laser powder bed fusion additive manufacturing in the as-built and post-processed conditions | |
Hansheng Chen1  Majid Laleh2  Carina Ledermueller3  Simon Ringer4  Sophie Primig5  Xiaozhou Liao5  Zibin Chen6  Nima Haghdadi7  | |
[1] Corresponding authors.;Engineering, UNSW Sydney, NSW 2052, Australia;Institute for Frontier Materials, Deakin University, Waurn Ponds, VIC 3216, Australia;Microanalysis, and School of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney, NSW 2006, Australia;;Australian Centre for Microscopy &School of Engineering, Deakin University, Waurn Ponds, VIC 3216, Australia;;School of Materials Science & | |
关键词: Additive manufacturing; Duplex stainless steel; Microstructure; Pitting corrosion; Heat treatment; | |
DOI : | |
来源: DOAJ |
【 摘 要 】
The effects of additive manufacturing (AM) and post-AM heat treatment on microstructural characteristics and pitting corrosion of 2205 duplex stainless steel were studied and benchmarked against its conventionally hot-rolled counterpart. The rapid solidification and possible loss of N associated with AM resulted in a non-equilibrium microstructure dominated by δ-ferrite with a minor fraction of austenite and abundant Cr2N precipitation. Atom probe tomography revealed that no depletion of Cr occurs around intragranular Cr2N. A deduction in Cr was observed adjacent to intergranular Cr2N particles, however, Cr content in these regions remained above the critical value of 13 wt%. Post-AM heat treatment was effective in restoring the duplex microstructure while dissolving the Cr2N precipitates. Although the pitting resistance in the as-built AM specimen was lower than that of its hot-rolled counterpart, it was fully recovered after post-AM heat treatment.
【 授权许可】
Unknown