Evolution of γ/γ' phases, their misfit and volume fractions in Al10Co25Cr8Fe15Ni36Ti6 compositionally complex alloy
| Autor: | Florian Vogel, Guido Schmitz, Rüya Duran, Anna M. Manzoni, Haneen Daoud, Sebastian Haas, Frank Mücklich, Hisham Aboulfadl, Daniel M. Többens, Syo Matsumura, Uwe Glatzel, Nelia Wanderka, J. M. Yu |
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| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Diffraction Materials science Annealing (metallurgy) Mechanical Engineering High entropy alloys Alloy 02 engineering and technology Atom probe engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure 01 natural sciences law.invention Superalloy Crystallography Mechanics of Materials law Transmission electron microscopy 0103 physical sciences engineering General Materials Science 0210 nano-technology |
| Zdroj: | Materials Characterization. 154:363-376 |
| ISSN: | 1044-5803 |
| Popis: | Recently introduced Al10Co25Cr8Fe15Ni36Ti6 compositionally complex alloy has been investigated in the as-cast state and after heat treatment in a thorough characterization. The combination of optical, scanning and transmission electron microscopy, three dimensional atom probe and x-ray diffraction, both at lab and synchrotron level provides precise information of the microstructural evolution. After the typical dendritic solidification the alloy reveals dendritic cores consisting of γ and γ' phases and interdendritic regions consisting of η and Heusler type phases. Homogenization removes the interdendritic regions and their phases and subsequent annealing produces a microstructure similar to Ni based superalloys consisting of γ/γ' phases. In addition, about 50 μm sized Al-Ni rich needle-shaped precipitates of Heusler type structure can be observed. The four phases and their evolution with heat treatment are investigated in detail. Special focus lies on the γ/γ' misfit determination and the determination of volume fractions by different methods. |
| Databáze: | OpenAIRE |
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