The brazing of nickel alloys for nuclear reactor with the using of the rapidly-quenched filler metals

Logvenchev, I. S.; Ivannikov, A. A.; Volkov, A. A.; Arofikin, N. V.; Sevryukov, O. N.; Fedotov, V. T.; Сучков, А. Н.; Fedotov, Ivan; Skrytnyi, V. I.

doi:10.1134/s2075113314030101

Cited by 8 publications

(4 citation statements)

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“…The common way to join complex elemental systems is brazing-the widespread technology used in nuclear [20,21], aerospace [22] and automotive [23,24] industry. This technology is also used in the manufacturing process of ITER components [25,26].…”

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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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%

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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“…We manufactured the following joint: Rusfer/TiZr4Be/Ta/TiZr4Be/W. STEMET brazing alloys are widely used in the nuclear, air and automotive industries [32][33][34][35][36]. TiZr4Be alloy has a good glass forming ability (GFA) produced by melt spinning [37], and a high GFA makes it possible to produce flexible foil by this spinning technology.…”

Section: Methodsmentioning

confidence: 99%

Brazing Tungsten/Tantalum/RAFM Steel Joint for DEMO by Fully Reduced Activation Brazing Alloy 48Ti-48Zr-4Be

Bachurina

Сучков

Gurova

et al. 2021

Metals

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To create a DEMO reactor, it is necessary to develop high-quality technology to join tungsten with reduced-activation ferritic-martensitic (RAFM) steel (Rusfer, Eurofer, CLF-1, etc.). Difficulties arise in their direct connection due to the large difference in the coefficient of thermal expansion (CTE). To suppress the difference of CTE, intermediate interlayers are usually used, such as vanadium or tantalum, and brazing is a prospective technology to conduct the joining. The vast majority of works represent copper- or nickel-based brazing alloys, but their applicability is under significant discussion due to their activation properties. That is why, in this work, fully reduced activation 48Ti-48Zr-4Be wt.% brazing alloy was used. The following joint was made: Rusfer steel/48Ti-48Zr-4Be/Ta/48Ti-48Zr-4Be/W. The brazing was successfully carried out under a mode providing thermal heat treatment of Rusfer. Through EDS and EBSD analysis, the microstructure of the joint was determined. Shear strength of the as-joined composition was measured as 127 ± 20 MPa. The joint endured 200 thermocycles in the temperature range between 300–600 °C, but the fillet regions degraded.

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“…Thus, the study of the Ti-Zr-Co ller metals characteristics will allow to approach the creation of a biocompatible brazed ceramic-titanium joint. Rapidly quenched ller metals have proven their effectiveness for brazing critical structures of aerospace and nuclear technology [30][31][32]. They show unique results in wetting the surfaces of materials, and also allow to obtain high-strength joints.…”

Section: Introductionmentioning

confidence: 99%

Brazing of ZTA ceramic with titanium for biomedical application

Fedotov,

Ivannikov,

Terehova

et al. 2024

Preprint

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The purpose of this work was to determine the wetting angles on ZTA ceramic and titanium by new Zr-30Ti-20Co filler metal, identify the mechanism of crystallization during brazing and conduct further corrosion tests of Ti-ZTA brazed joints in Ringer Locke solution. With electronic microscopy, XRD and EDS study it was found that the structure of the joint was represented by eutectic and eutectoid structural components, consisting of α-(Ti,Zr) and (Ti, Zr)2Co phases. With a cyclic potentiodynamic test the pitting corrosion of intermetallic compounds (Ti, Zr)2Co in the brazed joint was revealed. The analysis of ions concentration in Ringer Locke solution shows that cobalt ions are mainly released into the solution during electrochemical tests.

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The brazing of nickel alloys for nuclear reactor with the using of the rapidly-quenched filler metals

Cited by 8 publications

References 0 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

Brazing Tungsten/Tantalum/RAFM Steel Joint for DEMO by Fully Reduced Activation Brazing Alloy 48Ti-48Zr-4Be

Brazing of ZTA ceramic with titanium for biomedical application

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