Detecting acoustic emission during cyclic crack growth in simulated BWR environment. Discussion
Detecting acoustic emission during cyclic crack growth in simulated BWR environment. Discussion
复制标题
在模拟沸水堆环境中检测循环裂纹扩展期间的声发射。
DOI：
10.1520/stp33458s
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发表时间：
1981
期刊：
影响因子：
--
通讯作者：
M. Niitsuma
中科院分区：
文献类型：
--
作者：
H. Nakajima;T. Shoji;M. Kikuchi;H. Nütsuma;M. Shindo;J. Masounave;J. Bailon;F. Hamel;M. Niitsuma
对SA 533 B级钢在模拟沸水堆水环境中循环裂纹扩展的声发射进行了检测和分析。通过适当的降噪技术获得了由环境增强裂纹扩展引起的显著水平的信号。通过减少加载销和试样之间的摩擦噪声，并通过表征从各种源发出的信号的频谱，离散信号识别成为可能。从发射能量和裂纹扩展速率之间的经验关系，利用这种类型的声发射技术的可能性进行了讨论，在未来的连续监测运行的核电站。
An attempt is made to detect and analyze acoustic emissions from cyclic crack growth in SA 533 Grade B steel in the simulated boiling-water reactor (BWR) water environment. Significant levels of signals caused by the environment-enhanced crack growth were obtained through appropriate noise reduction techniques. By reducing the frictional noises between the loading pins and the specimen, and by characterizing the spectrum of signals emitted from various sources, discrete signal identification was made possible. From an empirical relationship between the energy of emission and the crack growth rate, the possibility of utilizing this type of acoustic emission technique was discussed in relation to future continuous monitoring of operating nuclear plants.