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Meeting 2021 TMS Annual Meeting & Exhibition
Symposium Environmental Degradation of Additively Manufactured Alloys
Presentation Title Tailoring Microstructure in Additively Manufactured Stainless Steels for Enhanced Corrosion Performance
Author(s) Jason Trelewicz, David J. Sprouster, Gary Halada, Joseph J. Sopcisak, Steven M. Storck
On-Site Speaker (Planned) Jason Trelewicz
Abstract Scope In laser additively manufactured 316L, enhanced pitting susceptibility has been discussed in the context of the cellular microstructure that forms during printing. Interestingly, some studies also report on laser printed samples with seemingly enhanced stability against pitting relative to wrought 316L. The complexity of these highly heterogeneous microstructures has thus made it difficult to identify the mechanisms governing localized attack, and in turn design printed alloys with performance exceeding their wrought counterparts. In this study, we explore the microstructural underpinnings of localized corrosion in laser additively manufactured 316L using multi-modal characterization techniques. The dislocation density and its dependence on printing conditions are correlated to chemical heterogeneities formed at the nanoscale. On this basis, accelerated pitting is attributed to depletion of Cr and carbide formation in regions of high dislocation density. We finally show that ceramic dopants can inhibit accelerated pitting corrosion by augmenting the chemical state of the cellular walls.
Proceedings Inclusion? Planned:
Keywords Additive Manufacturing, Environmental Effects, Iron and Steel

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Additively Manufactured 316L Stainless Steel for Nuclear Applications
Anisotropic Electrochemical Response of Laser Powder Bed Additively Fused Ti6Al4V in Chloride Medium
Characterization of Corrosion Behavior in Additively Manufactured Al-6061 RAM Processed by Laser Powder Bed Fusion (L-PBF)
Comparing Corrosion of Alloys Made by Additive Manufacturing and Traditional Methods
Comparison of Oxidation Behavior of Ultrasonic Additively Manufactured and Conventional Zircaloy-4
Corrosion Behavior of Functionally Graded Inconel 718 Produced by Additive Manufacturing
Effect of Heat Treatment on the Stress Corrosion Cracking Behavior of an Additively Manufactured 7050 Aluminum Alloy Produced by Selective Laser Melting (SLM)
Effect of High-temperature Oxidation on the Fatigue Properties of Inconel 625 Fabricated by Laser Additive Manufacturing
Electrochemical Response of Additively Printed Inconel 718 by Laser-based Direct Energy Deposition
High Performance AM Stainless Steel 316L Under Corrosive Environment
High Temperature Air Oxidation Behavior of Ni-based Superalloys Processed by Electron Beam Melting (EBM) and Selective Laser Melting (SLM)
High Temperature Oxidation and Corrosion of LBM and EBM Ni-base Superalloys and Ti Alloys
High Temperature Oxidation of Additively Manufactured FeCrAl and Ni-based Alloys
Improving the Corrosion Performance of Additively Manufactured 316L via Chemically-modified Feedstock
Influence of Cold Spray Deposition Parameters on Pitting of AA2024
Localized Corrosion of Additively Manufactured Stainless Steels
Melt Pool Boundaries and the Corrosion of Laser Powder Fusion Stainless Steels
Microstructural Evolution and Oxidation Behavior of Fe-25Cr-20Ni-1.4Nb-0.2C Steel Fabricated by Laser Powder-bed Fusion
Nano-crystalline Cold Spray Coatings for Repair and Retrofit of Existing Large-Scale Structures
Performance of Additively Manufactured FeCrAl Alloy Accident Tolerant Fuel Cladding in Nuclear Power Reactor Environments
Selective Corrosion and Sensitization Behavior in Laser Powder Bed Fusion 316L
Sensitization and Stress Corrosion Cracking of Alloy 800H by Laser Powder Bed Fusion
Simulation of the Effect of Corrosion on the Mechanical Properties of Porous Mg Scaffolds Fabricated by Power Bed Laser Fusion for Biomedical Applications
Tailoring Microstructure in Additively Manufactured Stainless Steels for Enhanced Corrosion Performance

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