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Meeting 2022 TMS Annual Meeting & Exhibition
Symposium Refractory Metals
Presentation Title Development of novel chromium-superalloys strengthened by B2 intermetallic precipitates
Author(s) Kan Ma, Jóhan Pauli Magnussen, Anke S. Ulrich, Till König, Mathias C. Galetz, Alexander J. Knowles
On-Site Speaker (Planned) Kan Ma
Abstract Scope Common to many high temperature applications, increases in operating temperature are eagerly sought to improve the thermal efficiency of concentrated solar plants (CSPs). However, increasing operating temperature creates new challenges for the materials employed. Chromium (Cr) offers significant advantages for advanced CSPs with its high melting point, low price and good resistance in corrosive environments. However, the mechanical properties of Cr-based materials still need improvement to match current nickel superalloys, both for creep resistance and low temperature toughness. Here we explore the ‘bcc-superalloy’ design concept by introducing ordered-bcc (B2) NiAl precipitates into disordered-bcc (A2) Cr matrix to give Cr-superalloys that are hoped to confer attractive properties. This work addresses the demonstration and optimization of B2-A2 microstructures. The influence of alloying content, alloying element and thermal treatment on the morphology, distribution and volume fraction of precipitates is investigated alongside their influence on mechanical and environmental properties.
Proceedings Inclusion? Planned:
Keywords Characterization, High-Temperature Materials,

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Bending Creep Deformation of ODS MoLa with 0.6 vs 1.1 wt.%La
Design of BCC high-entropy alloys with low neutron absorption cross-section
Design of MoWTaTiZr Refractory Multi-principal Element Alloys
Development of Heat-Treatable Crss-Cr3Si-based Alloys: Microstructure, Oxidation, and Creep
Development of novel chromium-superalloys strengthened by B2 intermetallic precipitates
Effect of heating rate and substrate on the oxidation behavior of hafnium aluminum diboride thin films
Flexible powder production for additive manufacturing of refractory metals and alloys
Flow behavior and associated microstructures of niobium at 1200 to 1500°C
Grain boundary doping as effective method to improve mechanical properties in ultra-fine grained tungsten
Grain Boundary Segregation Engineering in Technically Pure Molybdenum Examined via Three-point Bending Tests
High-throughput Engineering of Oxidation Behavior in complex refectory alloys
Hydrogen Reduction of Cobalt(II,III) oxide to make sub-micron and micron size cobalt metal powder for WC-Co synthesis
NanoPhase Separation Sintering in Mo and Mo-W Based Systems
Nanostructured tungsten alloys for nuclear fusion
Oxidation behavior of Mo-Si-B-Al alloys at elevated temperature
Platinum-based superalloys: Combating high temperatures and aggressive environments
Realizing sub-micron tungsten and tungsten composite microstructures via deformable punch spark plasma sintering
Refractory High Entropy Alloys for Applications in Extreme Environments
Studies on the phase formation of cobalt contacted with zinc vapour
Sustainability-based Selection of Materials for Refractory High Entropy Alloys
Tensile Properties of Molybdenum & ODS MoLa Sheet at Elevated Temperatures
The influence of impurities on the interfacial chemistry of niobium – alumina high-temperature refractories
The oxidation behavior of the eutectic alloy Mo-20Si-52,8Ti in dry and wet atmospheres
Thermal stability of thin rolled potassium-doped tungsten sheets at temperatures between 1100 °C and 1400 °C
Thermodynamic assessment of the V-Ti-B system
Tungsten grain optimization and composite fabrication for use in fusion reactors

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