Cr-Mo-V-W: a new refractory and transition metal high-entropy alloy system
| Autor: | Gregory R. Lumpkin, D. Ikeuchi, Alexander J. Knowles, Kevin J. Laws, E.G. Obbard, D.J.M. King, R.D. Aughterson |
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| Přispěvatelé: | United Kingdom Atomic Energy Authority, Ikeuchi, Daiki [0000-0002-6707-5969], Apollo - University of Cambridge Repository |
| Rok vydání: | 2018 |
| Předmět: |
Technology
Materials science ANNEALING TREATMENT Alloy Search and Predict (ASAP) MULTICOMPONENT ALLOYS PHASE Alloy Materials Science Thermodynamics Materials Science Multidisciplinary 02 engineering and technology Solidus engineering.material OXIDATION 01 natural sciences NBCRMO0.5TA0.5TIZR ALLOY Transition metal DESIGN Phase (matter) 0103 physical sciences General Materials Science Density functional theory (DFT) Nanoscience & Nanotechnology 0912 Materials Engineering CALPHAD Materials Phase diagram 010302 applied physics Science & Technology STABILITY Mechanical Engineering Metals and Alloys Refractory metals WEAR BEHAVIOR 021001 nanoscience & nanotechnology Condensed Matter Physics Mechanics of Materials engineering Science & Technology - Other Topics Metallurgy & Metallurgical Engineering MICROSTRUCTURE 0210 nano-technology SOLID-SOLUTION Solid solution 0913 Mechanical Engineering |
| Popis: | Cr-Mo-V-W high-entropy alloy (HEA) is studied, with 2553 K equilibrium solidus and high Cr content to promote protective oxide scale formation, suggesting potential applications in hot, oxidising environments. Alloy Search and Predict (ASAP) and phase diagram calculations found a single phase, body-centred cubic (BCC) solid solution at elevated temperatures, across the range of compositions present within the system - uncommon for a HEA of refractory and transition metals. Density functional theory identified solubility of 22 at.% Cr at solidus temperature, with composition-dependent drive for segregation during cooling. An as-cast, BCC single-phase with the composition 31.3Cr-23.6Mo-26.4 V-18.7 W exhibiting dendritic microsegregation was verified. |
| Databáze: | OpenAIRE |
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