About this Abstract |
Meeting |
Materials Science & Technology 2020
|
Symposium
|
Additive Manufacturing: Materials, Alloy Development, Microstructure and Properties
|
Presentation Title |
Microstructure and Corrosion Characteristics of 316L Stainless Steel Fabricated by Laser Powder Bed Fusion Process |
Author(s) |
Balachander Gnanasekaran, Yao Fu |
On-Site Speaker (Planned) |
Balachander Gnanasekaran |
Abstract Scope |
In this study, microstructural and corrosion characteristics of AM 316L SSs have been investigated using advanced microscopic characterization techniques and electrochemical testing. The variation of critical microscopic features with printing parameters are identified. Correspondingly, the changes observed in the corrosion resistance in 3.5% NaCl indicated by the pitting corrosion resistance and their relationship with microstructure and printing conditions are identified. It is found that the AM 316L SSs, in general, demonstrate an improved corrosion resistance compared with conventionally manufactured 316L, reflected by increased pitting potential. Both hatch spacings show an increase in pitting potential with laser power followed by a decrease. Solidification texture affects the corrosion resistance as shown by the difference in pitting potential tested on the two perpendicular surfaces. The enhanced pitting corrosion resistance of AM 316L compared with the conventional ones is likely to relate to the dislocation cells and solidification texture of the AM sample. |