| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Characterization of Minerals, Metals and Materials 2024: Process-Structure-Property Relations and New Technologies
|
| Presentation Title |
Initiation and Propagation of Corrosion on Additively Manufactured Stainless Steel |
| Author(s) |
Michael A. Melia, Nicole Nimeh, Kasandra Escarcega, Peter Renner, Erin Karasz, Jason Taylor |
| On-Site Speaker (Planned) |
Michael A. Melia |
| Abstract Scope |
Susceptibility to localized corrosion of laser powder bed fusion (L-PBF) stainless steels has been a topic of research for the past several years. However, few investigations focus on the influence of as-printed surfaces on corrosion when exposed to atmospheric environments. Surface microstructure-corrosion initiation and propagation relationships will be presented for as-printed L-PBF 316L stainless steel samples after exposure for 1 year to constant humidity (40% relative humidity) and salt loading (300 µg/cm2 of artificial sea water). Optical and electron microscopy were used to identify the extent and surface microstructural features associated with corrosion initiation. Plasma focused ion beam milling, serial sectioning, and electron microscopy were used to determine common corrosion pathways for as-printed surfaces. The non-metallic films on the as-printed surface and melt pool boundaries that form during the L-PBF process control corrosion initiation and propagation, respectively.
SNL is managed and operated by NTESS under DOE NNSA contract DE-NA0003525. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Characterization, Environmental Effects |