Acoustic Emission Monitoring of Laser Shock Peening by Detection of Underwater Acoustic Wave
Acoustic Emission Monitoring of Laser Shock Peening by Detection of Underwater Acoustic Wave
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DOI：
10.2320/matertrans.m2015401
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发表时间：
2016-05
影响因子：
1.2
通讯作者：
T. Takata;M. Enoki;P. Chivavibul;A. Matsui;Yuji Kobayashi
中科院分区：
文献类型：
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作者：
T. Takata;M. Enoki;P. Chivavibul;A. Matsui;Yuji Kobayashi
声发射技术是实时评价材料变形或损伤的大小、位置和发生时间的无损方法之一。通常情况下，声发射传感器直接附着在部件表面来检测声发射波，但这种方法给许多工业过程带来了不便的设置。本文研究了一种用于监测激光冲击喷丸(LSP)的声发射传感器的布置。不是将传感器直接安装在目标上，而是将多个声发射传感器放置在水层中，以探测通过水传播的声波。结果表明，该传感器布置具有良好的监测LSP性能。利用反褶积技术从检测到的声发射波形中获得了液固耦合过程中的冲击压力。此外，通过声发射测量，用高速摄像机观察了样品表面，并对液固相沉积过程中的现象进行了研究。[DOI：10.2320/MATERTRA.M2015401]
Acoustic Emission (AE) technique is one of the nondestructive methods to evaluate the size, location and generation time of deformation or damage of material in real times. Generally AE sensors are directly attached on the surface of the component to detect AE wave, however this method brings about inconvenient setting to many industrial processes. In the present study, an arrangement of AE sensors was investigated to monitor laser shock peening (LSP). Instead of direct attachment of the sensors on the target, several AE sensors were located in the water layer to detect acoustic wave propagating through the water. The results showed that the sensor arrangement has a good performance to monitor LSP. Impact pressures during LSP process were obtained from detected AE waveforms by deconvolution technique. In addition, with AE measurement, sample surface was observed by high speed camera and investigated phenomena during LSP process. [doi:10.2320/matertrans.M2015401]