Abstract
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 90min) at 940°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.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
