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Meeting Materials Science & Technology 2020
Symposium Computation Assisted Materials Development for Improved Corrosion Resistance
Presentation Title High Temperature Oxidation Lifetime Modeling of FeCr and NiCr Foils in Water Vapor
Author(s) Marie Romedenne, Rishi Pillai, Sebastien Dryepondt, Bruce Pint
On-Site Speaker (Planned) Marie Romedenne
Abstract Scope Fe-based alloys are typically employed in heat exchanger components for combined heat and power generation systems. However, operating temperatures above 650 C are desired to improve efficiency of these applications requiring the use of Ni-based alloys (e.g. alloy 625), which typically form a protective Cr2O3 scale. The ability to maintain formation of a protective Cr2O3 scale depends on an interplay of different processes (loss in wall thickness, subsurface Cr depletion, Cr2O3 volatilization). Foil specimens of Fe- and Ni-based alloys were oxidized in dry and wet air for up to 30,000 h at 650, 700 and 800 C. Recuperator foils exposed for up to 100,000 h at about 650 C in real engine conditions were also analyzed. The impact of composition, temperature and gas flow rates on Cr depletion and loss of wall thickness of the foils will be discussed with an oxidation kinetics model and coupled thermodynamic-kinetic diffusion calculations.
Proceedings Inclusion? Planned: At-meeting proceedings

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Applying Machine Learning to Determine the Corrosion Resistance of Alloys
Assessing High Temperature Durability for Long-term Applications
Development of a Multiscale Corrosion Model for Valve Steels in a Gasoline Engine Environment
High Temperature Oxidation Lifetime Modeling of FeCr and NiCr Foils in Water Vapor
Introductory Comments: Computation Assisted Materials Development for Improved Corrosion Resistance
Machine Learning to Predict Cyclic Oxidation of NiCr-based alloys
Metal-Oxide Bond-energy Models for Bond Energies of Alloy Oxides in Corrosion
Simulation of Dissolution of \Gamma\Prime Precipitates in Ni-base Superalloys during Oxidation
Tailoring the Microstructure of Eutectoid Steels during Annealing for Improved Corrosion Resistance: Insights from Phase-field Simulations

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