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Meeting 2018 TMS Annual Meeting & Exhibition
Symposium Refractory Metals 2018
Presentation Title Alloying Behaviour and Properties of Tetragonal Nb5Si3
Author(s) Panayiotis Tsakiropoulos
On-Site Speaker (Planned) Panayiotis Tsakiropoulos
Abstract Scope New high-temperature alloys are needed to replace Ni-based superalloys that have reached their maximum intrinsic temperature capability. Nb-silicide based alloys can offer balance of properties and meet property goals. In these alloys the tetragonal Nb5Si3 silicide is the key phase for achieving a balance of high temperature properties and the creep goal. In Nb5Si3 the Nb can be substituted by other transition metals, e.g. Cr, Hf, Mo, Ta, Ti and W, and the Si by other simple metals and metalloids, e.g. Al, B, Ge and Sn. The presentation will discuss the alloying behaviour of tetragonal Nb5Si3 using data for alloyed 5-3 silicides, and will demonstrate the link between alloying and the hardness and creep of Nb5Si3. It will also show how this understanding of alloying-property relationships has led to the new alloy design methodology NICE (Niobium Intermetallic Composite Elaboration) for the design and/or selection of Nb-silicide based alloys.
Proceedings Inclusion? Planned: Supplemental Proceedings volume

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

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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