SCC Monitoring of Chloride Droplets on Thin SUS304 Plate Specimens by Analysis of Continuous Recorded AE Waveform
SCC Monitoring of Chloride Droplets on Thin SUS304 Plate Specimens by Analysis of Continuous Recorded AE Waveform
复制标题
通过分析连续记录的 AE 波形对 SUS304 薄板样品上的氯化物液滴进行 SCC 监测
DOI：
10.2320/matertrans.i-m2010813
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发表时间：
2010
影响因子：
1.2
通讯作者：
M. Enoki
中科院分区：
文献类型：
--
作者：
K. Ito;H. Yamawaki;H. Masuda;M. Shiwa;M. Enoki
提出了一种声发射（AE）监测方法，用于研究SUS 304不锈钢的氯化物应力腐蚀开裂（SCC）机理。该方法将液滴SCC监测系统和能够连续波形数据采集和存储的AE系统相结合。将MgCl 2液滴置于SUS 304薄板试样上诱导SCC。针对检测到的声发射波形幅值小、噪声大的特点，提出了一种基于连续波形时频分析的噪声滤除方法。筛选后约200例AE事件被剔除。扫描电镜观察表明，声发射源可归因于穿晶应力腐蚀开裂，这是传统的声发射监测系统无法检测到的。因此，新的方法显示了高灵敏度的SCC监测。[doi：10.2320/材料trans.I-M2010813]
An acoustic emission (AE) monitoring method for chloride stress corrosion cracking (SCC) in SUS304 stainless steel has been proposed to investigate this mechanism. The method combines a droplet SCC monitoring system and an AE system capable of continuous waveform data acquisition and storage. MgCl2 droplets were placed on a thin plate specimen of SUS304 to induce SCC. Since detected AE waveforms had small amplitudes with large noises, a means of noise filtering was developed to extract these features, based on time-frequency analysis of the continuous waveform. About 200 AE events were taken out after filtering. SEM observation showed that the AE source was attributable to transgranular SCC which cannot be detected by conventional AE monitoring systems. Therefore the new method demonstrated high sensitivity for the SCC monitoring. [doi:10.2320/matertrans.I-M2010813]
影响因子：
1.2
作者：
Ito, Kaita;Enoki, Manabu
通讯作者：
Enoki, Manabu