SCC Monitoring of Chloride Droplets on Thin SUS304 Plate Specimens by Analysis of Continuous Recorded AE Waveform

被引：11

作者：

Ito, Kaita ^{[1
,2
]}

Yamawaki, Hisashi ^{[1
]}

Masuda, Hiroyuki ^{[1
]}

Shiwa, Mitsuharu ^{[1
]}

Enoki, Manabu ^{[2
]}

机构：

[1] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan

[2] Univ Tokyo, Dept Mat Engn, Tokyo 1138656, Japan

来源：

MATERIALS TRANSACTIONS | 2010年 / 51卷 / 08期

基金：

日本学术振兴会;

关键词：

stress corrosion cracking; droplet; acoustic emission method; continuous recording; time-frequency analysis; ACTIVE PATH CORROSION; HYDROGEN EMBRITTLEMENT; CRACKING; STEEL;

D O I：

10.2320/matertrans.I-M2010813

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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]

引用

页码：1409 / 1413

页数：5

共 14 条

[1]

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[2]

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[3]

Fujimoto S., 2004, Zair. Kankyo/Corros. Eng, V53, P309, DOI [10.3323/jcorr1991.53.309, DOI 10.3323/JCORR1991.53.309]

[4] Noise reduction of continuous recorded laser AE waveform by time-frequency analysis [J].