Joining tungsten with steel for DEMO: Simultaneous brazing by Cu-Ti amorphous foils and heat treatment

被引：14

作者：

Bachurina, Diana ^{[1
]}

Suchkov, Alexey ^{[1
]}

Gurova, Julia ^{[1
]}

Savelyev, Maxim ^{[1
]}

Dzhumaev, Pavel ^{[1
]}

Kozlov, Ilya ^{[1
]}

Svetogorov, Roman ^{[2
]}

Leont'eva-Smirnova, Maria ^{[1
,3
]}

Sevryukov, Oleg ^{[1
]}

机构：

[1] Natl Res Nucl Univ MEPhI, Dept Mat Sci, Moscow 115409, Russia

[2] Natl Res Ctr Kurchatov Inst, Moscow 123182, Russia

[3] Bochvar High Technol Res Inst Inorgan Mat, Moscow 123098, Russia

来源：

FUSION ENGINEERING AND DESIGN | 2021年 / 162卷

关键词：

DEMO; Ferritic-martensitic steel; Tungsten; First wall; Brazing; 1ST WALL; HIP JOINTS; MICROSTRUCTURE; OPTIMIZATION;

D O I：

10.1016/j.fusengdes.2020.112099

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

Development of a reliable technology to join tungsten with steel is essential for DEMO application; however, it is difficult due to large differences in their physical properties. To solve this problem, high-temperature brazing was carried out. Cu-Ti brazing alloys, which were rapidly solidified into foil, were used together with a compensating vanadium interlayer, so the EK-181 steel/Cu-28Ti/V/Cu-50Ti/W and EK-181/Cu-50Ti/V/Cu-50Ti/W brazed joints were obtained. The microstructures of the seams were investigated by optical microscopy, SEM (EDX, EBSD) and synchrotron XRD. Thermocycling and shear strength tests showed that Cu-28Ti wt. % brazing alloy ensures a firmer joint compared to Cu-50Ti wt. %. The Cu-28Ti wt. % brazing alloy was used to perform high-temperature brazing in the brazing mode equivalent to traditional EK-181 steel heat treatment. It showed that every step of the heat treatment affected the microstructures and the shear strength.

引用

页数：11

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