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Meeting 2017 TMS Annual Meeting & Exhibition
Symposium Energy Materials 2017: Materials in Clean Power
Presentation Title Microstructural Stability of High Cr Containing FeCrAl Alloys with Minor Alloying Additions
Author(s) Yukinori Yamamoto, Bruce A. Pint, Benjamin Shassere, Sudarsanam Suresh Babu
On-Site Speaker (Planned) Yukinori Yamamoto
Abstract Scope The effect of minor alloying additions on microstructural stability of Fe-30Cr-3Al-0.2Si-2Nb alloy was investigated. The additions of W, Mo, and Ti, substituting for Nb, were selected with guidance from thermodynamic calculations to control Fe2Nb Laves phase precipitation kinetics in the BCC-Fe matrix. These alloying additions lowered the solvus temperature to expand the process temperature window without decreasing the volume fraction of second-phase particles for precipitate strengthening at 700C. However, the alloying additions also resulted in coarsening the second-phase particles during aging at 700C. Optimization is required to balance the beneficial effects on the process window with the reduced particle size stability. The addition of Y stabilized the grain structure at elevated temperatures. This effect would aid in controlling grain size during hot-work processes, together with stabilizing the microstructure at the heat affected zone of weldments. Research sponsored by the Crosscutting Research Program, Office of Fossil Energy, U.S. Department of Energy.
Proceedings Inclusion? Planned: Stand-alone book in which only your symposium’s papers would appear (indicate title in comments section below)

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

C-21: Novel Hydrogen Storage Reaction Pathway of LiBH4+MgH2 Mixtures Enabled by Ball Milling and Aerosol Spraying
C-22: Pyrolysis of Different Wood Species Investigated by TGA-GC-MS
Corrosion of Energy System Materials in Supercritical Carbon Dioxide (sCO2)
Creep-Fatigue-Oxidation Interactions under Fossil Energy Service Conditions
Defect Chemistry of Black Anatase TiO2: An Ab Initio Study
Early Stage Oxidation of Alloy 617 in CO2 Power Cycle Environments
Effect of Pressure and Thermal Cycling on Compatibility in CO2 for Concentrated Solar Power Applications
High Temperature Oxidation of Ni-base Alloys and Stainless Steels in Supercritical CO2 for Power Systems Applications
Manipulating Creep through Modifying Gamma Prime Coarsening Rate in Haynes 282 for A-USC Power Plants
Microstructural Stability of High Cr Containing FeCrAl Alloys with Minor Alloying Additions
Nickel-doped Titania Nanotube Arrays and Their Application in Hydrogen Production
Pb-Bi-Sb and Pb-Bi-Ge: Novel Alternative Alloys for Application as Heat-transport Fluids in Concentrated Solar Power Systems
Phase Relation Prediction for AgxCu1-xGayIn1-ySe2 PV Absorber Layers
Solid-State, High-Shear Manufacturing to Enable Lower Cost and Higher Performance Materials for Energy Conversion
The Composite Materials with Semiconductor and Ionic Conductor for Novel Low Temperature Solid Oxide Fuel Cells
The Impacts of Alternative Fuels and Associated High Water Vapor Content Environments on the Stability and Aging of Turbine Hot-Section Materials
Transient Liquid Phase Bonding of Ni-based-superalloy-H230 for Microchannel Heat Exchanger for Application in Supercritical CO2 Cycles

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