About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
Environmental Degradation of Additively Manufactured Alloys
|
Presentation Title |
Role of Microstructure and Surface Finish on the Corrosion of Selective Laser Melted 304 and 316 Stainless Steel |
Author(s) |
Eric Schindelholz, Michael Melia, Rebecca Schaller, Jesse Duran, Jeffrey Rodelas |
On-Site Speaker (Planned) |
Eric Schindelholz |
Abstract Scope |
This presentation examines how the unique microstructural features and surface finish of SLM stainless steels affect corrosion resistance relative to their conventionally processed counterparts. Recent studies on the electrochemical behavior of SLM 316L and 304L in saline solutions will be discussed within the context of hierarchal microstructural and surface features governing corrosion resistance across multiple length scales. Global and local electrochemical methods, such as a capillary microelectrochemical cell, in combination with electron microscopy were used to correlate corrosion behavior to microstructure for both as-printed and polished material surfaces. The deleterious role of bulk material and surface defects, the exceptional pitting resistance enabled by ultrafine second phase inclusions, and the role of less obvious features such as melt pool boundaries will be discussed. Based on these studies, processing and post-processing targets for enhanced corrosion resistance are addressed along with areas for future work. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |