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Meeting 2020 TMS Annual Meeting & Exhibition
Symposium Refractory Metals 2020
Presentation Title Development of Refractory Complex Concentrated Alloys RCCAs Using Diffusion Couple Approach
Author(s) Vivek Verma, Michael Titus, David Johnson, Kaustubh Kulkarni
On-Site Speaker (Planned) Vivek Verma
Abstract Scope Exceptional properties of Refractory High Entropy Alloys (RHEAs) and Refractory Complex Concentrated Alloys (RCCAs) make them promising candidate materials to replace conventional refractory alloys for high temperature applications. However, due to the enormous composition available for these alloys, novel approaches are required for development of specific alloy compositions. Being multicomponent alloys with potential high temperature applications, an in-depth understanding of diffusional interactions is important. As we move from binary to higher order systems, diffusion interactions among alloying elements become significant and in turn affect the interdiffusion behavior of the system. Recent work has shown that diffusional interactions correlate with the enthalpy of mixing, potentially enabling new alloy development strategies by predicting the enhancement or decrease of elemental activities and mobilities. In the present work, a series of AlMoNbTi alloys were fabricated for maximization of Al activities and characterized using the diffusion couple technique. Importance of diffusional interactions will be discussed.
Proceedings Inclusion? Planned: Supplemental Proceedings volume
Keywords Characterization,


Alloying for Precipitation Hardening in Chromium
Development of Refractory Complex Concentrated Alloys RCCAs Using Diffusion Couple Approach
Dislocation Multiplication from a Frank-Read Source in Six Body-centered Cubic Refractory Metals
Dynamic Grain Growth in Refractory Metals
Effect of Dislocations and Grain Boundaries on Magnetic Flux Trapping in High-purity Niobium used for Superconducting Radio Frequency Cavities
Effect of Strain Rate on the Anisotropic Tensile Mechanical Properties of High Purity Niobium Single Crystals
Hot Isostatic Pressing of WC-3009 Niobium-Based Refractory Alloy
Intermetallic Precipitate Reinforced Refractory Metal Alloys toward ‘bcc-superalloys’
Mechanical Testing of Tungsten-Steel Laminate Composites for use in Fusion Applications
Microstructure, Microhardness and Oxidation Behavior of Mo-Si-B alloys in the Moss+Mo2B+Mo5SiB2 Three Phase Region
Modifying Grain Boundary Cohesion in Ultra-fine Grained Tungsten and Tungsten-based Nanocomposites through Systematic Doping
Molybdenum Foil Tensile Testing
Performance of Niobium and Molybdenum Alloys for High Temperature Sensing Applications
Pressureless Sintering and Microstructure Evolution of Ultrafine-grained Tungsten
Refractory Alloys 3D Printing for Missile and Space Applications
Seeking Toughness in Mo-Si-B: Composites of Stable Oxides
Static and Dynamic Grain Growth in Niobium at 1200 to 1500℃
The Influence of Dislocation Density on Thermal Conductivity in Pure Niobium from 2-9K
Thermally Activated Deformation Processes in W-Re Alloys
ZrC-W Composites Prepared by Reactive Melt Infiltration of Zr2Cu Alloy into Binder-jet Printed WC Preforms

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