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

• ITO Kaita

  Department of Materials Engineering, School of Engineering, The University of Tokyo

• YAMAWAKI Hisashi

  National Institute for Materials Science

• MASUDA Hiroyuki

  National Institute for Materials Science

• SHIWA Mitsuharu

  National Institute for Materials Science

• ENOKI Manabu

  Department of Materials Engineering, School of Engineering, The University of Tokyo

Bibliographic Information

Other Title

• 連続計測AE波形の解析によるSUS304薄板試験片の塩化物液滴SCCモニタリング
• レンゾク ケイソク AE ハケイ ノ カイセキ ニ ヨル SUS304 ウスイタ シケンヘン ノ エンカブツ エキテキ SCC モニタリング

Abstract

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.

Journal

• Journal of The Japanese Society for Non-Destructive Inspection

  Journal of The Japanese Society for Non-Destructive Inspection 58 (1), 25-29, 2009

  The Japanese Society for Non-Destructive Inspection

Keywords

• Stress corrosion cracking
• Droplet
• Acoustic emission method
• Continuous recording
• Time-frequency analysis

Details

• CRID: 1390282681469819648
• NII Article ID: 10024944660
• NII Book ID: AN00208370
• DOI: 10.11396/jjsndi.58.25
• NDL BIB ID: 9762520
• ISSN: 03675866
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I9762520
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed