In-Situ Observation and Acoustic Emission Analysis for SCC of MgCl2 Droplet in SUS304 Stainless Steel

被引：10

作者：

Shiwa, Mitsuharu ^{[1
]}

Masuda, Hiroyuki ^{[1
]}

Yamawaki, Hisashi ^{[1
]}

Ito, Kaita ^{[2
]}

Enoki, Manabu ^{[2
]}

机构：

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

[2] Univ Tokyo, Sch Engn, Dept Mat Engn, Tokyo 1138685, Japan

来源：

MATERIALS TRANSACTIONS | 2014年 / 55卷 / 02期

关键词：

stress corrosion cracking; droplet; SUS304 stainless steel; acoustic emission; in-situ optical observation; WAVE-FORM; NOISE;

D O I：

10.2320/matertrans.M2013331

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Acoustic emission and optical video microscope monitoring was proposed to investigate the stress corrosion cracking of work-hardened SUS304 stainless steel caused by a small magnesium-chloride droplet. The crack propagation length could measure clearly under the droplet by VMS. The SCC started at 45-82 ks with pitting. The crack velocity was 3.2-4.7 mu m/ks and it propagated almost continuously. AE signals were generated at early stage of SCC testing of 55 and 82 ks, after that they were generated discontinuously. With the SEM observations, the detected AE signals were mainly attributed to cracking of the oxidation products and discontinuous crack propagation at the falling-off surface grain.

引用

页码：285 / 289

页数：5

共 12 条

[1] Acquisition and analysis of continuous acoustic emission waveform for classification of damage sources in ceramic fiber mat [J].