About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
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Environmental Degradation of Additively Manufactured Alloys
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Presentation Title |
Understanding the Anomalous Corrosion Behavior of Additively Manufactured Stainless Steels through Multi-modal Synchrotron Techniques |
Author(s) |
Jason Trelewicz, David Sprouster, Gary Halada, Hanfei Yan, Yong Chu, Eric Dooryhee, Guhaprasanna Manogharan |
On-Site Speaker (Planned) |
Jason Trelewicz |
Abstract Scope |
Additive manufacturing processes produce materials with hierarchical microstructures containing fusion boundaries at the macroscale, irregular grains and grain boundaries at the microscale, and subgrain dislocation structures at the nanoscale. In 316L stainless steels, corrosion performance has been discussed in the context of chemical heterogeneities formed in the presence of these hierarchical microstructures. However, the large variability in reported measurements underscores the need for statistically significant microstructural data, which is often difficult to access via electron microscopy alone. In this presentation, we explore multi-modal synchrotron x-ray techniques for quantifying hierarchical microstructures and their connection to the underlying chemical distribution in 316L stainless steel. Our results show that the dislocation density depends on the printing conditions with implications for the chemical distribution at the nanoscale. Corrosion rates and pit densities are then discussed to build a connection between printing conditions and corrosion performance vis-à-vis microstructural and chemical information from synchrotron measurements. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |