| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Processing Effects on Microstructure and Material Performance
|
| Presentation Title |
A-133: On the Microstructure and Corrosion Behavior of Wire Arc Additively Manufactured AISI 420 Stainless Steel |
| Author(s) |
Mostafa Kazemipour, Jonas Lunde, Salar Salahi, Ali Nasiri |
| On-Site Speaker (Planned) |
Jonas Lunde |
| Abstract Scope |
In this study, a robotic wire arc additive manufacturing (WAAM) technology utilizing advanced surface tension transfer mode was adopted to fabricate a thin wall of AISI 420 stainless steel. The microstructure and corrosion properties of the as-printed wall were studied and compared to its wrought counterpart. Optical microscopy, scanning electron microscopy (SEM), X-ray diffraction (XRD), and electron backscatter diffraction (EBSD) analysis were used to determine the microstructure of the wall. The dominant microstructure of the wall comprised 𝛿-ferrite phase and carbides micro-constituents embedded in a martensitic matrix, revealing a gradual decrease in the amount of formed carbides from the bottom of the wall towards its top. The corrosion behavior of the wall was evaluated using electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (PD) testing. As a general trend, the upper portion of the fabricated wall revealed an improved corrosion resistance and reduced pitting susceptibility than the bottom layers. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |