Joining of tungsten with low-activation ferritic–martensitic steel and vanadium alloys for demo reactor

The conceptual designs of the blanket and the helium-cooled divertor of the DEMO reactor require joining of reduced activation steel (for example RUSFER EK-181, EUROFER, etc.) and tungsten. Significant differences in their physical properties can lead to the generation of the stresses during cooling...

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Main Authors:	Diana Bachurina, Alexey Suchkov, Boris Kalin, Oleg Sevriukov, Ivan Fedotov, Pavel Dzhumaev, Alexander Ivannikov, Maria Leont'eva-Smirnova, Eugene Mozhanov
Format:	Article
Language:	English
Published:	Elsevier 2018-05-01
Series:	Nuclear Materials and Energy
Online Access:	http://www.sciencedirect.com/science/article/pii/S235217911730128X

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spelling	doaj-8a4dcdaab7d047cea0d80ec710a841cf2020-11-24T20:53:45ZengElsevierNuclear Materials and Energy2352-17912018-05-0115135142Joining of tungsten with low-activation ferritic–martensitic steel and vanadium alloys for demo reactorDiana Bachurina0Alexey Suchkov1Boris Kalin2Oleg Sevriukov3Ivan Fedotov4Pavel Dzhumaev5Alexander Ivannikov6Maria Leont'eva-Smirnova7Eugene Mozhanov8Department of Materials Science, National Research Nuclear University MEPhI, Moscow 115409, Russia; Corresponding author.Department of Materials Science, National Research Nuclear University MEPhI, Moscow 115409, RussiaDepartment of Materials Science, National Research Nuclear University MEPhI, Moscow 115409, RussiaDepartment of Materials Science, National Research Nuclear University MEPhI, Moscow 115409, RussiaDepartment of Materials Science, National Research Nuclear University MEPhI, Moscow 115409, RussiaDepartment of Materials Science, National Research Nuclear University MEPhI, Moscow 115409, RussiaDepartment of Materials Science, National Research Nuclear University MEPhI, Moscow 115409, RussiaDepartment of Materials Science, National Research Nuclear University MEPhI, Moscow 115409, Russia; Bochvar High-Technology Research Institute of Inorganic Materials, ul. Rogova 5, Moscow 123098, RussiaBochvar High-Technology Research Institute of Inorganic Materials, ul. Rogova 5, Moscow 123098, RussiaThe conceptual designs of the blanket and the helium-cooled divertor of the DEMO reactor require joining of reduced activation steel (for example RUSFER EK-181, EUROFER, etc.) and tungsten. Significant differences in their physical properties can lead to the generation of the stresses during cooling and, as a result, to the failure of the joint. In this paper, diffusion brazing of RUSFER EK-181 steel with tungsten using a V–4Ti–4Cr interlayer was obtained. Rapidly-quenched ribbon brazing alloys based on copper of various compositions were used. Brazing was carried out in vacuum furnaces at temperatures in the range of 800–1000 °C. The structural-phase states of the joints obtained were studied, the microhardness was measured, and thermocycling tests were performed in the interval of 700 to 25 °C. FEM simulation was used to calculate the optimal thickness of the interlayer. Keywords: Tungsten-steel joint, Diffusion brazing, DEMO, Plasma facing component, FEM simulationhttp://www.sciencedirect.com/science/article/pii/S235217911730128X
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Diana Bachurina Alexey Suchkov Boris Kalin Oleg Sevriukov Ivan Fedotov Pavel Dzhumaev Alexander Ivannikov Maria Leont'eva-Smirnova Eugene Mozhanov
spellingShingle	Diana Bachurina Alexey Suchkov Boris Kalin Oleg Sevriukov Ivan Fedotov Pavel Dzhumaev Alexander Ivannikov Maria Leont'eva-Smirnova Eugene Mozhanov Joining of tungsten with low-activation ferritic–martensitic steel and vanadium alloys for demo reactor Nuclear Materials and Energy
author_facet	Diana Bachurina Alexey Suchkov Boris Kalin Oleg Sevriukov Ivan Fedotov Pavel Dzhumaev Alexander Ivannikov Maria Leont'eva-Smirnova Eugene Mozhanov
author_sort	Diana Bachurina
title	Joining of tungsten with low-activation ferritic–martensitic steel and vanadium alloys for demo reactor
title_short	Joining of tungsten with low-activation ferritic–martensitic steel and vanadium alloys for demo reactor
title_full	Joining of tungsten with low-activation ferritic–martensitic steel and vanadium alloys for demo reactor
title_fullStr	Joining of tungsten with low-activation ferritic–martensitic steel and vanadium alloys for demo reactor
title_full_unstemmed	Joining of tungsten with low-activation ferritic–martensitic steel and vanadium alloys for demo reactor
title_sort	joining of tungsten with low-activation ferritic–martensitic steel and vanadium alloys for demo reactor
publisher	Elsevier
series	Nuclear Materials and Energy
issn	2352-1791
publishDate	2018-05-01
description	The conceptual designs of the blanket and the helium-cooled divertor of the DEMO reactor require joining of reduced activation steel (for example RUSFER EK-181, EUROFER, etc.) and tungsten. Significant differences in their physical properties can lead to the generation of the stresses during cooling and, as a result, to the failure of the joint. In this paper, diffusion brazing of RUSFER EK-181 steel with tungsten using a V–4Ti–4Cr interlayer was obtained. Rapidly-quenched ribbon brazing alloys based on copper of various compositions were used. Brazing was carried out in vacuum furnaces at temperatures in the range of 800–1000 °C. The structural-phase states of the joints obtained were studied, the microhardness was measured, and thermocycling tests were performed in the interval of 700 to 25 °C. FEM simulation was used to calculate the optimal thickness of the interlayer. Keywords: Tungsten-steel joint, Diffusion brazing, DEMO, Plasma facing component, FEM simulation
url	http://www.sciencedirect.com/science/article/pii/S235217911730128X
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Joining of tungsten with low-activation ferritic–martensitic steel and vanadium alloys for demo reactor

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