Microstructure of the tungsten and reduced activation ferritic-martensitic steel joint brazed with an Fe-based amorphous alloy

被引：17
|
作者：
Wang, J. B. [1 ]
Lian, Y. Y. [1 ]
Feng, F. [1 ]
Chen, Z. [1 ]
Tan, Y. [1 ]
Yang, S. [1 ]
Liu, X. [1 ]
Qiang, J. B. [2 ]
Liu, T. Z. [2 ]
Wei, M. Y. [2 ]
Wang, Y. M. [2 ]
机构：
[1] Southwestern Inst Phys, POB 432, Chengdu 610041, Sichuan, Peoples R China
[2] Dalian Univ Technol, Minist Educ, Key Lab Mat Modificat Laser Ion & Electron Beams, Dalian 116000, Peoples R China
来源：
FUSION ENGINEERING AND DESIGN | 2019年 / 138卷
基金：
中国国家自然科学基金;
关键词：
Divertor; First wall; Tungsten; RAFM steels; Brazing; Amorphous filler metal; HELIUM-COOLED DIVERTOR; MECHANICAL-PROPERTIES; BRAZING FOILS; DEMO; DESIGN; FABRICATION; INTERLAYER; CHOICE;
D O I：
10.1016/j.fusengdes.2018.11.017
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：
The effective joining of tungsten (W) and reduced activation ferritic-martensitic (RAFM) steels is crucial to fabrication of the divertors and first wall of future fusion reactors. In the present work, a low-activation Fe-based amorphous alloy of Fe67.8Cr11.5Si2.1B18.6 (at. %) is designed as the filler metal for brazing W and RAFM steels. Crack-free joint has been achieved with the amorphous alloy filler and a vanadium interlayer metal by short-time vacuum brazing at 1270 degrees C. Layer structures composed of intermetallic phases and single solid-solution phases, respectively, are alternately formed in the W/RAFM steel joint, exhibiting alternating hard and soft mechanical characteristic. Long-distance diffusion of W atoms to the steel substrate is blocked by the formation of FeW2B2 and Fe3B phases, and Si and B elements are confined within the main bonding seam of the joints. Microstructure recovery for the steel is realized following the standard heat treatment procedures. The present results suggest a promising way of making strong and tough W/RAFM joints with low-activation Fe-based amorphous alloys.
引用
收藏
页码：164 / 169
页数：6
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