ITER第一壁模块Be/Cu连接界面的热疲劳损伤分析

摘要

采用热等静压扩散连接技术并通过添加Ti/Cu中间过渡层实现了Be与CuCrZr合金之间的可靠连接,所制作的ITER第一壁小模块已通过高热负荷疲劳试验.对试验后的小模块进行了超声波无损探伤,发现界面多处存在大尺寸缺陷.介绍了高热负荷疲劳试验后模块的破坏性检测与分析,结合对缺陷界面的金相观察、SEM观察及EDS分析方法,确定了缺陷形成的主要原因.%The ITER first wall mock-ups fabricated by joining CuCrZr and 316L(N) stainless steel with explosion welding, machining cooling channel, and then bonding Be tiles on CuCrZr interface with a hot isocratic press technology were subject to high heat flux test, the ultrasonic testing result of mock-up revealed that some larger defects on Be/Cu joint localized on the central area in mock-up. The defects located on Be/Cu interface were inspected by cutting sampling, combined with optical microscope, SEM observation and EDS, analyzing the possible reason what the defects caused by, leading to the first wall manufacturing technology optimization and better material choice.