Tungsten joining with copper alloy and its high heat load performance
2014; Elsevier BV; Volume: 455; Issue: 1-3 Linguagem: Inglês
10.1016/j.jnucmat.2014.07.041
ISSN1873-4820
AutoresXiang Liu, Youyun Lian, Lei Chen, Zengkui Cheng, Jiming Chen, Xuru Duan, Jioupeng Song, Yang Yu,
Tópico(s)Nuclear reactor physics and engineering
ResumoW–CuCrZr joining technology by using low activation Cu–Mn filler metal was developed at Southwestern Institute of Physics (SWIP) for the manufacturing of divertor components of fusion experiment devices. In addition, a fast W coating technology by chemical vapor deposition (CVD) was also developed and CVD-W/CuCrZr and CVD-W/C mockups with a W coating thickness of 2 mm were prepared. In order to assess their high heat flux (HHF) performances, a 60 kW Electron-beam Material testing Scenario (EMS-60) equipped with a 150 keV electron beam welding gun was constructed at SWIP. Experimental results indicated that brazed W/CuCrZr mockups can withstand 8 MW/m2 heat flux for 1000 cycles without visible damages and CVD-W/CuCrZr mockups with W–Cu gradient interface can survive 1000 cycles under 11 MW/m2 heat flux. An ultrasonic inspection method for non-destructive tests (NDT) of brazed W/CuCrZr mockups was established and 2 mm defect can be detected. Infinite element analysis and heat load tests indicated that 5 mm defect had less noticeable influence on the heat transfer.
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