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Meeting MS&T22: Materials Science & Technology
Symposium Additive Manufacturing: Mechanisms and Mitigation of Aqueous Corrosion and High-temperature Oxidation
Presentation Title Microstructural Characterization and High-Temperature Oxidation of Laser Powder Bed Fusion Processed Inconel 625
Author(s) Emily Rose Lewis, Nick Cruchley , Moataz Attallah, Sam Cruchley
On-Site Speaker (Planned) Emily Rose Lewis
Abstract Scope Laser Powder Bed Fused (L-PBF) Inconel 625 (IN625) is a prime candidate for the design of oxidation resistant components at high temperatures. However, existing research into the microstructure and oxidation performance of L-PBF IN625 is limited to short time exposures non-reflective of in-service conditions. This study aims to identify the influence of printed microstructure, post-process heat treatment, and surface modifications on the long-term isothermal oxidation behaviour of L-PBF IN625. Oxidation mechanisms were analysed using mass gain kinetics and oxide film characterisation using scanning electron microscopy, energy dispersive spectroscopy and electron backscatter diffraction. Results showed that printed features such as a dendritic microstructure, microsegregation of Nb and Mo, texture, and surface roughness collectively influenced the oxidation properties. The morphology and distribution of δ-phase (Ni3(Nb,Mo)) precipitate also differed across different heat treatments and surface finishes. Oxidation kinetics were similar to wrought alloy, but more closely followed sub-parabolic and cubic behaviours.


Corrosion Evaluation of Additively Manufactured Al-Cu-X Alloys
Effect of Aging Treatment on Stress Corrosion Cracking Response of Cold Sprayed Al 6061 Alloy
Electrochemical Behavior of Additively Manufactured Non-spherical Ti-6Al-4V in Saline Water
Electrochemical Performance of Additively Manufactured 8620 Low Alloy Steel: Effect of Acetic Acid
Leveraging Additive Manufacturing to Co-design Mechanical Properties and Environmental Resistance
Microstructural Characterization and High-Temperature Oxidation of Laser Powder Bed Fusion Processed Inconel 625

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