Investigation of a brazed joint EK-181/V/W obtained by Cu-Sn and Cu-Ti amorphous foils

Bachurina, Diana; Сучков, А. Н.; Gurova, Yu.A.; Sevryukov, O. N.

doi:10.1088/1757-899x/1005/1/012010

Cited by 3 publications

(4 citation statements)

References 16 publications

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“…Our scientific group investigated Cu-based brazing alloys that rapidly solidified into foil. Cu-28/50Ti, Cu-12/20Sn, and Cu-12/25Ge, wt.% [12,26,33,38], and a vanadium interlayer were used to overcome the mismatch in CTE between tungsten and the Rusfer steel. In all cases, Cu-50Ti brazing alloy was used to join W with V, because Cu, Sn, and Ge do not dissolve in W, while Ti has a good solubility in W. Hence, to join V to Rusfer, other brazing alloys were investigated.…”

Section: The Latest Progress Made In Tungsten/steel Brazingmentioning

confidence: 99%

“…The first is carried out by means of hot isostatic pressing [8,9] and spark plasma sintering [10,11]. The second is carried out by means of vacuum brazing, using foils [12,13], powders [14], and liquid-forming interlayers [15]. Some of the advantages of considering brazing as a prospective technology include:…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, this technology is used in the assembly of ITER components and is currently actively investigated with a view to its use in DEMO production. Meanwhile, a compensating interlayer is usually used [12,18,19] to reduce the residual stresses arising from differences in CTE. In this case, the development of brazing alloys suitable for two seams (tungsten/interlayer and interlayer/steel) is required.…”

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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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Section: The Latest Progress Made In Tungsten/steel Brazingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

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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“…However, until now no fully reduced activation brazing alloy has been used, or the strength of the joint was low [21]. Instead, scientists use nickel [17,22,23] or copper [11,[24][25][26] brazing alloys, although these materials do not fully satisfy the requirement of reduced activation. To solve this problem, we are attempting to use a fully reduced activation composition, 48Ti-48Zr-4Be wt.%.…”

Section: Introductionmentioning

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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W/Fe co-sputtered layers for tungsten to steel joints

Casalegno

Perero

Girman

et al. 2023

Nuclear Materials and Energy

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Investigation of a brazed joint EK-181/V/W obtained by Cu-Sn and Cu-Ti amorphous foils

Cited by 3 publications

References 16 publications

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

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

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

W/Fe co-sputtered layers for tungsten to steel joints

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