A Ti-Fe-Sn thin film assembly for joining tungsten and reduced activation ferritic-martensitic steels

作者：Zhu, Wen; Qiang, Jianbing; Wang, Yingmin^*; Sun, Jizhong; Wang, Jianbao; Lian, Youyun; Feng, Fan; Liu, Xiang

来源：Materials and Design, 2017, 125: 55-61.

DOI：10.1016/j.matdes.2017.03.060

• Divertor
• Tungsten
• RAFM steel
• Brazing
• Alloy design

The effective joining of tungsten and reduced activation ferritic-martensitic (RAFM) steels is crucial to fabrication of the divertor components of fusion reactors. In the presentwork, a lowneutron-activation filler metal system of Ti-Fe-Sn was designed to realize the so-called exothermic-reaction-assisted brazing. A series of three-layered Ti-Fe- Sn thin film assemblies were made by electroplating, which allowed the brazing of tungsten with a CLF-1 RAFM steel to be carried out at a temperature as low as 1090 degrees C. The joint structures made from the Sn-bearing filler metals demonstrated high strength and high resistance against thermocycling. The Sn-film layer in the filler assembly has delivered favorable alloying effects on depressing separation of Ti element in the W grain boundaries and the formation of pores, and on microstructure refinement in the brazed joints as well.

• 出版日期2017-7-5
• 单位大连理工大学; 核工业西南物理研究院