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Meeting MS&T23: Materials Science & Technology
Symposium High Temperature Corrosion and Degradation of Structural Materials
Presentation Title Comparison and Mechanism of High-temperature Oxidation Behavior of Additively Manufactured Haynes 282 to Wrought Haynes 282 in Direct-fired Supercritical CO<sub>2</sub> Power Cycle Environments
Author(s) Casey Carney, Nicholas Lamprinakos, Richard P. Oleksak, Omer N. Dogan, Anthony D. Rollett
On-Site Speaker (Planned) Casey Carney
Abstract Scope Materials selection is a key concern for corrosion resistance in elevated temperature and pressure direct-fired supercritical CO<sub>2</sub> (sCO<sub>2</sub>) power cycles. Additive manufacturing (AM) could be used to construct compact heat exchangers with complex geometry. Haynes 282 AM coupons were exposed to direct-fired sCO<sub>2</sub> conditions (95CO<sub>2</sub> – 4H<sub>2</sub>O – 1O<sub>2</sub>, 20 MPa) at both atmospheric pressure (T=850 C) and supercritical pressure of 20 MPa (T=750 C) for more than 1500 hours. The oxidation behavior is contrasted with the oxidation of wrought H282, so that the feasibility of the use of AM production methods for direct-fired sCO<sub>2</sub> power cycles can be assessed. Oxidation protection slightly increased with AM samples. Additionally, two potentially significant differences were observed: (a) sub-surface carbides were present in AM samples but not in the wrought samples and (b) the degree of chromia volatilization appeared to be suppressed in AM samples. Potential mechanisms for this behavior will be examined.

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Ablation Resistance of Ultra-high Temperature Polymer-derived Ceramic-matrix Composites
Comparison and Mechanism of High-temperature Oxidation Behavior of Additively Manufactured Haynes 282 to Wrought Haynes 282 in Direct-fired Supercritical CO2 Power Cycle Environments
Corrosion Behavior of Compositionally Gradient Additively Manufactured 316L Stainless Steel Doped with Hafnium in Eutectic NaCl-MgCl2 Molten Salt at 700 °C
Cyclic Oxidation of NbTiZr Using a Resistive Heating System
Development of Ablation-Resistant, High Emittance Coatings for Carbon/Carbon Composites for Hypersonic Application
Discovery of High Entropy Rare Earth Disilicates for Extreme Environments
Effect of Gaseous Environments and Alloy/Coatings Composition on the Mixed Deposit-induced Degradation of Advanced Alloys/Coatings
Effect of Temperature and Impurities on the Oxidation Behavior of Ni-based Alloys in Hot CO2-rich Gases
Environmental Creep Behavior of Austenitic Steels in CO2
Evaluating Corrosivity of Molten Salts Using Halide Optical Basicity Index
Evolution of Interfacial Morphogenesis and Stability of Alloys in Harsh Environments
High-throughput Investigation of Microstructure & High Temperature Oxidation Behavior of CrMoNbTaW
High Temperature Materials Study for HCl+SO2 and HF+P2O5 Environments
High Temperature Oxidation Behavior of Zr vs ZrC
Impact of Environmental Barrier Coating Chemistries on the Oxidation of Si-base Materials
Intermediate Temperature Oxidation of Melt Infiltrated SiC/BN/SiC CMCs
Investigating Fifth Oxide Effect on CMXAS Glass Properties
Liquid Metal Embrittlement Assessment of F82H in Li
On the Thermodynamic Properties of CrTaO4: A Computational Perspective
Oxidation and Hot Corrosion Performance of Fe-Cr-Ni Based Alloys
Oxidation of Additively Manufactured AM-ZrB2-30vol%SiC under CO2 Exposure
Oxidation of B2-(Ru,Pd)Al Alloys for Bond Coat Applications
Solid Particle Erosion of Ceramic Matrix Composites and Environmental Barrier Coatings: Current Progress and Future Direction
Stress Assisted Corrosion Behavior of Al0.1CrCoFeNi High Entropy Alloy in a Molten NaCl-Na2SO 4 Salt
Surface Coatings Providing Protection Against High Temperatures and Corrosion in the Production of Coke
T91 Boiler Tube Oxidation Performance and Oxide Spallation in Supercritical Steam Thermal Cycling Conditions
Thermophysical Properties of Xenotime Inspired Rare Earth Phosphate EBCs

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