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Meeting Materials Science & Technology 2020
Symposium High Temperature Corrosion and Degradation of Structural Materials
Presentation Title The Effect of Surface Treatment on the Formation, Structure, and Chemistry of Protective Oxide Scale on High-temperature Oxidation-resistant Nickel Alloys
Author(s) Stephen D. House, Henry O Ayoola, John Lyons, Meng Li, Bingtao Li, Judith C Yang, Wissam A Saidi, Brian Gleeson
On-Site Speaker (Planned) Stephen D. House
Abstract Scope High-temperature oxidation-resistant alloys often have finishes – such as polishing or vapor-blasting – applied to their exposed surfaces for aesthetic or practical reasons, which introduce deformation into the surface grain structure. Upon heating, a region of recrystallized grain structure can form at the surface. The degree and depth of the recrystallized zone depends on the type of surface finishing treatment, which in turn affects the extent of imposed surface deformation. Haynes 214 is a high-temperature oxidation-resistant nickel-aluminum-chromium-iron alloy that is known to form adherent alumina scales above 955 C. Below this temperature, however, it can form either an alumina, chromia, or a combined oxide scale. In this work we employed surface (SEM, AFM) and subsurface (S/TEM, FIB) imaging and spectroscopic techniques to investigate the effect of various surface finishes on oxide scale formation and the surface and subsurface structure of the alloy resulting from the deformation and high-temperature oxidation processes.
Proceedings Inclusion? Undecided

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Corrosion Study of Stainless Steel 316 with Different Coatings in MgCl2-KCl Heat Transfer Fluid
Effect of Al Addition on Oxidation Behavior of a New Mo-Si-B Alloy
Elucidating Influence of Alloy Composition, Thermal Cycling and Environment on Oxidation Behavior of Engine Exhaust Valve Materials
Environmental Resistance and Microstructure Design in Mo-Si-B Alloys
Exploring Materials Options for sCO2 Applications: Steels to Cermets
Influence of the Water Vapor on Oxide Scale and Alpha Case Layer in Ti6Al4V
Introductory Comments: High-temperature Corrosion and Degradation of Structural Materials
Kinetic Modeling of High-temperature Oxidation of Pure Metals by Incorporating Wagner’s Theory into the CALPHAD Approach
Long-term Oxidation Behavior of Chromia-forming Alloys in High-temperature CO2 and Air
Machine Learning and Data Analytics for Accelerating High-temperature, Corrosion-resistant Materials Design
Metal Dusting of Ni-based Alloys at Elevated Pressure in Different Gas Compositions
The Effect of Surface Treatment on the Formation, Structure, and Chemistry of Protective Oxide Scale on High-temperature Oxidation-resistant Nickel Alloys
Thermochemical Stability of EBC Silicates in High-temperature High-velocity Water Vapor

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