CAJ | 학술논문

托卡马克装置的偏滤器靶板多为钨块-铜管穿管部件，钨块-铜管间采用热等静压(HIP)焊接且有过渡层，具有多层管状结构。针对该多层管焊接界面的无损检测，提出了管外施加偏置磁场的电磁超声检测方法，开发了多层管电磁超声检测信号数值模拟程序，通过计算和比较缺陷区域大小和探头-缺陷相对位置对检出信号的影响，分析了横波和纵波探头的检测灵敏度和空间分辨率，说明了电磁超声无损检测方法对多层管界面脱粘缺陷检测的有效性。
탁잡마극장치적편려기파판다위오괴-동관천관부건，오괴-동관간채용열등정압(HIP)한접차유과도층，구유다층관상결구。침대해다층관한접계면적무손검측，제출료관외시가편치자장적전자초성검측방법，개발료다층관전자초성검측신호수치모의정서，통과계산화비교결함구역대소화탐두-결함상대위치대검출신호적영향，분석료횡파화종파탐두적검측령민도화공간분변솔，설명료전자초성무손검측방법대다층관계면탈점결함검측적유효성。
The vertical target of diverter of a Tokamak system consists of a lot of units of W-Cu Mono-block which has a multi-layer tube structure and is bonded together with the HIP welding technique.To validate the NDT method for quality of welding joint of the Mono-blocks,a numerical code was developed for the signal simulation of EMAT of a multi-layer tube,and was used to investigate the detectability and space resolution of EMAT probes with two different structures.Numerical results verified the validity of the proposed EMAT method and probe structure for the inspection of delamination in multilayer tube.