About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
Environmental Degradation of Additively Manufactured Alloys
|
Presentation Title |
C-10: Localized Corrosion of Selective Laser Melted Stainless Steel 316L |
Author(s) |
Duane Armell Macatangay, Jonathan M Skelton, Wenhao Lin, Robert G Kelly, Ji Ma |
On-Site Speaker (Planned) |
Duane Armell Macatangay |
Abstract Scope |
In recent years, additively manufactured metallic alloys such as 316L stainless steel produced by SLM have garnered attention due to opportunities in waste reduction, time and cost efficiency, and fabrication of geometrically complex structures. However, corrosion properties of SLM metal alloys are not well understood. The microstructure in materials produced by SLM is significantly different from that of its wrought counterpart, resulting in the presence of numerous heterogeneities that can ultimately lead to localized corrosion. This study characterizes the dependence of melt-pool boundary attack and intergranular corrosion and assesses a series of microstructure-based mechanisms responsible for the electrochemical behavior of these SLM 316L alloys. Galvanostatic etching, potentiodynamic scans, mass-loss testing, and accelerated testing of wrought and SLM 316L were used to reveal the localized corrosion behavior in these alloys. Focused ion beam and transmission electron microscopy was utilized to understand the microstructural origins of these observations. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |