Joining tungsten with steel for DEMO: Simultaneous brazing by Cu-Ti amorphous foils and heat treatment
| Autor: | Julia Gurova, Maxim Savelyev, Roman Svetogorov, A. N. Suchkov, M. V. Leont’eva-Smirnova, Pavel Dzhumaev, O. N. Sevryukov, Diana Bachurina, Ilya S. Kozlov |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Mechanical Engineering Metallurgy Alloy chemistry.chemical_element engineering.material Tungsten Microstructure 01 natural sciences 010305 fluids & plasmas Amorphous solid law.invention Nuclear Energy and Engineering Optical microscope chemistry law 0103 physical sciences Shear strength engineering Brazing General Materials Science 010306 general physics FOIL method Civil and Structural Engineering |
| Zdroj: | Fusion Engineering and Design. 162:112099 |
| ISSN: | 0920-3796 |
| DOI: | 10.1016/j.fusengdes.2020.112099 |
| Popis: | Development of a reliable technology to join tungsten with steel is essential for DEMO application; however, it is difficult due to large differences in their physical properties. To solve this problem, high-temperature brazing was carried out. Cu-Ti brazing alloys, which were rapidly solidified into foil, were used together with a compensating vanadium interlayer, so the EK-181 steel/Cu-28Ti/V/Cu-50Ti/W and EK-181/Cu-50Ti/V/Cu-50Ti/W brazed joints were obtained. The microstructures of the seams were investigated by optical microscopy, SEM (EDX, EBSD) and synchrotron XRD. Thermocycling and shear strength tests showed that Cu-28Ti wt. % brazing alloy ensures a firmer joint compared to Cu-50Ti wt. %. The Cu-28Ti wt. % brazing alloy was used to perform high-temperature brazing in the brazing mode equivalent to traditional EK-181 steel heat treatment. It showed that every step of the heat treatment affected the microstructures and the shear strength. |
| Databáze: | OpenAIRE |
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