High heat flux performance of W-Eurofer brazed joints

Prado, J. de; Sánchez, M.; Wirtz, M.; Pintsuk, G.; Du, Jun; Linke, J.; Ureña, A.

doi:10.1016/j.jnucmat.2017.10.054

Cited by 15 publications

(4 citation statements)

References 19 publications

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“…The shear test results presented herein have been compared with those obtained through alternative joining methods utilizing the same Cu interlayer by our research group. Higher shear strengths were achieved through brazing and hot isostatic pressing (HIP) techniques [ 33 , 36 , 37 ]. Specifically, brazing at 1135 °C for 10 min yielded a shear strength of approximately 220 MPa.…”

Section: Resultsmentioning

confidence: 99%

Exploring FAST Technique for Diffusion Bonding of Tungsten to EUROFERE97 in DEMO First Wall

Sánchez,

de Prado,

Izaguirre

et al. 2024

Materials

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The European Fusion Reactor (DEMO, Demonstration Power Plant) relies significantly on joining technologies in its design. Current research within the EUROfusion framework focuses on developing materials for the first wall and divertor applications, emphasizing the need for suitable joining processes, particularly for tungsten. The electric field-assisted sintering technique (FAST) emerges as a promising alternative due to its high current density, enabling rapid heating and cooling rates for fast sintering or joining. In this study, FAST was employed to join tungsten and EUROFERE97 steel, the chosen materials for the first wall, using 50-µm-thick Cu foils as interlayers. Three distinct joining conditions were tested at 980 °C for 2, 5, and 9 min at 41.97 MPa to optimize joint properties and assess FAST parameters influence. Hardness measurements revealed values around 450 HV0.1 for tungsten, 100 HV0.1 for copper, and 390 HV0.1 for EUROFER97 under all joining conditions. Increasing bonding time improved joint continuity along the EUROFER97/Cu and W/Cu interfaces. Notably, the 5 min bonding time resulted in the highest shear strength, while the 9 min sample exhibited reduced strength, possibly due to Kirkendall porosity accumulation at the EUROFER97/Cu interface. This porosity facilitated crack initiation and propagation, diminishing interfacial adhesion properties.

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Section: Resultsmentioning

confidence: 99%

Exploring FAST Technique for Diffusion Bonding of Tungsten to EUROFERE97 in DEMO First Wall

Sánchez,

de Prado,

Izaguirre

et al. 2024

Materials

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“…Prado et al have been studying the use of Cu-20Ti wt.% powder brazing alloy for joining tungsten to Eurofer steel directly [14,[39][40][41][42][43]. The filler was fabricated by laminating a mixture of pure metallic powders or mechanically alloyed powders with an organic binder.…”

Section: The Latest Progress Made In Tungsten/steel Brazingmentioning

confidence: 99%

“…It turned out that the strength decreased to 60 MPa after annealing. High Heat Flux Tests were carried out in [40]. It was shown that heating up to 600 • C led to failure even after 79 cycles.…”

Section: The Latest Progress Made In Tungsten/steel Brazingmentioning

confidence: 99%

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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“…Another prospective idea for the present research topic includes the production of W-Eurofer bi-materials via LPBF for first wall applications in future fusion reactors [90,91].…”

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confidence: 99%

Laser Powder Bed Fusion of Unalloyed Tungsten: A Review of Process, Structure, and Properties Relationships

Seyam

Koshy

Elbestawi

2022

Metals

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Tungsten (W) as a structural component has grown roots in many special applications owing to its radiation-shielding capabilities and its properties at elevated temperatures. The high ductile-brittle transition temperature (DBTT) and the very high melting point of tungsten however have limited its processability to certain technologies such as powder metallurgy. Laser powder bed fusion (LPBF) has been introduced in recent years as an alternative for manufacturing tungsten parts to overcome the design limitations posed by powder metallurgy technology. A review of the literature shows significant improvements in the quality of tungsten components produced by LPBF, implying a strong potential for manufacturing tungsten with this technology and a need for further research on this subject. This review paper presents the current state-of-the-art in LPBF of unalloyed tungsten, with a focus on the effect of process parameters on the developed structure/properties and identifies current knowledge gaps.

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High heat flux performance of W-Eurofer brazed joints

Cited by 15 publications

References 19 publications

Exploring FAST Technique for Diffusion Bonding of Tungsten to EUROFERE97 in DEMO First Wall

Exploring FAST Technique for Diffusion Bonding of Tungsten to EUROFERE97 in DEMO First Wall

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

Laser Powder Bed Fusion of Unalloyed Tungsten: A Review of Process, Structure, and Properties Relationships

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