About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
Environmental Degradation of Additively Manufactured Alloys
|
Presentation Title |
Issues in Localized Corrosion of Selective Laser Melted 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 |
Stainless steels such as 316L produced by selective laser melting (SLM) have advantages in terms of design space for structures compared to conventionally processed material. However, the localized corrosion phenomena and mechanisms in SLM materials 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 corrosion 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. Additionally, focused ion beam and transmission electron microscopy was utilized to understand the microstructural origins of these observations. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |