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首页> 外文会议>IEEE Far East NDT New Technology Application Forum >Detection of interlayer delamination in W monoblock of ITER divertors via electromagnetic acoustic transduction
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Detection of interlayer delamination in W monoblock of ITER divertors via electromagnetic acoustic transduction

机译：通过电磁声换能检测ITER偏滤器的W单体中的层间分层

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The W monoblock is one of the key components in divertors of the International Thermonuclear Experimental Reactor (ITER). During fabrication, it is prone to interlayer delamination posing a severe threat to integrity of diverters and safe operation of ITER. This opens up the research of efficient nondestructive evaluation techniques for quality assessment of W monoblock. In this paper, electromagnetic acoustic transduction with full-circumference radial excitation (FREM-EMAT) for detection of interlayer delamination in W monoblock has been intensively investigated via simulations and experiments. The probe parameters including the distance between permanent magnets, magnet type and height of excitation coil, etc and their influence on the transduction efficiency and testing signals are analyzed through semi-analytical modeling. Following this, a series of experiments have been carried out for detection of simulated interlayer delamination in W monoblocks via FREM-EMAT. It can be seen from the results that FREM-EMAT is capable of efficiently detecting the interlayer delamination with the diameter of 1mm in W monoblock, which fulfills the engineering requirement.
机译：W单体是国际热核实验反应堆（ITER）分流器中的关键组件之一。在制造过程中，容易发生层间分层，严重威胁分流器的完整性和ITER的安全运行。这开辟了用于W整块质量评估的有效无损评估技术的研究。本文通过模拟和实验深入研究了具有全周向径向激励的电磁声换能（FREM-EMAT），以检测W整块中的层间分层。通过半解析模型分析了永磁体之间的距离，磁体类型和励磁线圈的高度等探针参数及其对换能效率和测试信号的影响。此后，已经进行了一系列实验，以通过FREM-EMAT检测W单体中的模拟层间分层。从结果可以看出，FREM-EMAT能够有效地检测W单体中直径为1mm的层间分层，满足了工程需求。

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