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Meeting 2018 TMS Annual Meeting & Exhibition
Symposium Refractory Metals 2018
Presentation Title Assessments of the Mo-Si-X-(B) System for High Temperature Structural Application Potentials
Author(s) Young-Won Kim, Sang-Lan Kim
On-Site Speaker (Planned) Young-Won Kim
Abstract Scope Select Mo-Si-X-(B) alloys have been considered to possess high temperature (>1000C) structural application potentials in terms of their excellent oxidation resistance and good mechanical behavior. Their realization has been hindered by several critical barriers: 1) poor oxidation resistance at low temperatures (600-900C); 2) zero tensile plasticity up to BDTTs, 3) poor processing responses making the use of fine microstructures inevitable; and 4) consequently further lowered BDTTs (<1100C), above which creep strength is low for the required. The last three barriers are evaluated for the upper service temperature limits. Low temperature surface degradation is discussed with new data and detailed observations, along with the process that helps reduce the oxygen-surface interaction. This process involves preforming a high temperature glass layer containing finely dispersed Mo-rich particles that can be persistent at all temperatures due to the increased viscosity. Realistic approaches are proposed to redefine the scope and directions of future RD activities.
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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