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

Bachurina, Diana; Сучков, А. Н.; Kalin, B. A.; Sevriukov, O.N; Fedotov, Ivan; Джумаев, П. С.; Ivannikov, A. A.; Leont’eva-Smirnova, M. V.; Mozhanov, E. M.

doi:10.1016/j.nme.2018.03.010

Cited by 27 publications

(14 citation statements)

References 26 publications

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“…5. It is known that a direct joint between tungsten and steel is impossible due to the different coefficients of thermal expansion (CTE) which causes damage to the joint even after the manufacturing process [34,35]. To decrease thermal stresses responsible for a damage, the usage of interlayers is preferable.…”

Section: Methodsmentioning

confidence: 99%

“…To decrease thermal stresses responsible for a damage, the usage of interlayers is preferable. Ta and V efficiently reduce stresses to be occurred in tungsten [35]. In this work, pure Ta with the thickness of 200 µm and dimensions of 7 × 7 × 0.2 mm 3 was chosen because it doesnot form brittle eutectic with components of the filler alloy, apart from V forming the brittle eutectic with Zr [36,37].…”

Section: Methodsmentioning

confidence: 99%

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Self-passivating smart tungsten alloys for DEMO: a progress in joining and upscale for a first wall mockup

et al. 2021

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Self-passivating, so-called smart alloys are under development for a future fusion power plant. These alloys containing tungsten, chromium and yttrium must possess an acceptable plasma performance during a regular plasma operation of a power plant and demonstrate the suppression of non-desirable oxidation of tungsten in case of an accident. The up-scaling of the bulk smart alloys to the reactor-relevant sizes has begun and the first samples with a diameter of 50 mm and thickness of 5 mm became available. The samples feature high relative density of above 99% and good homogeneity. With production of bulk samples, the research program on joining the smart alloy to the structural material was initiated. In a present study, the novel titanium–zirconium–beryllium braze was applied successfully to join the smart alloy to the Rusfer-reduced-activation steel. The braze has survived at least a hundred of cyclic thermal excursions in the range of 300–600 °C without mechanical destruction.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Self-passivating smart tungsten alloys for DEMO: a progress in joining and upscale for a first wall mockup

et al. 2021

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“…As a result, an ITER-type CuCrZr pipe concept was chosen for Research & Development (R&D) activities for divertor applications. However, a lot of studies have already been published on helium-cooled divertor concepts [13,15,[24][25][26][27].…”

Section: Heat Loadsmentioning

confidence: 99%

“…The geometry was designed based on the parameters presented in [32]. The 2-mm-thick tungsten and reduced activation ferriticmartensitic steel (RAFM) Rusfer were modeled, and the properties of the materials were taken from [26].…”

Section: Fem Calculationsmentioning

confidence: 99%

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Overview of the Mechanical Properties of Tungsten/Steel Brazed Joints for the DEMO Fusion Reactor

Bachurina

Vorkel

Сучков

et al. 2021

Metals

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A Demonstration (DEMO) thermonuclear reactor is the next step after the International Thermonuclear Experimental Reactor (ITER). Designs for a DEMO divertor and the First Wall require the joining of tungsten to steel; this is a difficult task, however, because of the metals’ physical properties and necessary operating conditions. Brazing is a prospective technology that could be used to solve this problem. This work examines a state-of-the-art solution to the problem of joining tungsten to steel by brazing, in order to summarize best practices, identify shortcomings, and clarify mechanical property requirements. Here, we outline the ways in which brazing technology can be developed to join tungsten to steel for use in a DEMO application.

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Active Brazing of Silicon Carbide with Rapidly Quenched TiZrCuBe Filler Metal

Fedotov

Сучков

Ivannikov

et al. 2022

J. of Materi Eng and Perform

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

Cited by 27 publications

References 26 publications

Self-passivating smart tungsten alloys for DEMO: a progress in joining and upscale for a first wall mockup

Self-passivating smart tungsten alloys for DEMO: a progress in joining and upscale for a first wall mockup

Overview of the Mechanical Properties of Tungsten/Steel Brazed Joints for the DEMO Fusion Reactor

Active Brazing of Silicon Carbide with Rapidly Quenched TiZrCuBe Filler Metal

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