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Meeting 2018 TMS Annual Meeting & Exhibition
Symposium Refractory Metals 2018
Presentation Title Opportunities for BCC Refractory-metal-based Superalloys
Author(s) Alexander Knowles, Howard J Stone, David Dye
On-Site Speaker (Planned) Alexander Knowles
Abstract Scope Reinforcement with ordered intermetallic precipitates is a potent strategy for the development of strength alongside damage tolerance and is central to the success of fcc nickel-based superalloys. Such a strategy is equally of interest within bcc-based systems for their increased melting point and acceptable cost. However, only limited studies have been made on refractory metal (RM) or titanium based alloys strengthened by ordered-bcc precipitates (e.g. B2 or L21). In this talk, opportunities for refractory-metal-based superalloys systems will be discussed, including a review of Cr-Ni2AlTi, Mo-NiAl, Ta-(Ti,Zr)2Al(Mo,Nb) and Nb-Pd2HfAl systems together with newly developed alloys. These alloys exploit an extensive two-phase field that exists between A2 (RM,Ti) and B2 TiFe to produce nanoscale precipitate reinforced microstructures that increase the proof strength by over 500 MPa. This work was supported through EURO-Fusion Researcher Grant & EPSRC Doctoral Prize Fellowships, EPSRC ‘DARE’ ( EP/L025213/1 and Rolls-Royce/EPSRC Strategic Partnership EP/H022309/1 and EP/H500375/1.
Proceedings Inclusion? Planned: Supplemental Proceedings volume


A Metallurgical Study of Pressure Resistance Welded Molybdenum Based Materials
A Study on the Potential Analogous Rhenium Effect of Manganese in Tungsten-molybdenum Alloys Prepared by Mechanical Alloying
Alloying Behaviour and Properties of Tetragonal Nb5Si3
Assessments of the Mo-Si-X-(B) System for High Temperature Structural Application Potentials
Characteristics of Dynamic Abnormal Grain Growth in Mo and Ta
Effect of Oxide Coating on the Fusion Welding of Molybdenum Tubing
Fabrication of Tungsten Nanopowder by Combustion-based Method
Fracture Toughness Evaluation and Microstructural Characterization of Drawn Tungsten Wires
High Ductility in Bulk Polycrystalline Tungsten Produced by Equal Channel Angular Extrusion
High Temperature Oxidation Behaviors of Refractory Complex Concentrated Alloys (RCCAs)
Mechanical Behavior of a Three-phase Mo-Si-B Alloy Produced by Reaction Synthesis
Microstructure and Mechanical Properties of Cr-Si High-temperature Alloys
On the Design and Selection of Nb In Situ Composites
Opportunities for BCC Refractory-metal-based Superalloys
Oxidation and Creep Behavior of Mo-Si-Ti Alloys
Oxidation Resistance of W Substituted Mo-Si-B
Synthesis of MoC-graphite Composite by High-energy Ball Milling
Tensile Response of Binary Mo-Si Solid Solution Alloys

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