Wettability study of a Cu-Ti alloy on tungsten and EUROFER substrates for brazing components of DEMO fusion reactor

被引：29

作者：

de Prado, J. ^{[1
]}

Sanchez, M. ^{[1
]}

Urena, A. ^{[1
]}

机构：

[1] Univ Rey Juan Carlos, Mat Sci & Engn Area, ESCET, C Tulipan S-N, Madrid 28933, Spain

来源：

MATERIALS & DESIGN | 2016年 / 99卷

关键词：

EUROFER; Tungsten; Wetting; Brazing; HELIUM-COOLED DIVERTOR; MICROSTRUCTURE; STRENGTH; METAL;

D O I：

10.1016/j.matdes.2016.03.054

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A wettability study of Cu based filler alloy on tungsten and ferritic-martensitic steel (EUROFER) substrates has been performed for brazing applications in components of the divertor, which will be used in the future fusion power plant (DEMO). The wetting behavior has been evaluated by measurement of the contact angle of braze drops formed and solidified on the studied substrates after applying a brazing thermal cycle with different times (10, 30, 60 and 90 min) at 940 degrees C. The spreading capabilities of the Cu based alloy on EUROFER substrate are enhanced with the increase of wetting time due to the formation of different reaction layers. In addition, the extension of thermal cycle activated the diffusion mechanisms of the steel alloying elements causing a softening effect of the EUROFER close to the interface vicinity. Regarding the W/Cu based alloy wetting interface, there is no influence of the wetting time on the W microstructure and any wetting improvement was detected when wetting time is extended. In general, the increase of wetting time improves operational brazeability, but softening effect detected in EUROFER could reduce the local (metallurgical) brazeability of the studied system. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：93 / 101

页数：9

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