2015年
Estimation of Stress Corrosion Cracking Initiation and Propagation in High-Pressure, High-Temperature Water Environment Utilizing Acoustic Emission
MATERIALS TRANSACTIONS
- ,
- ,
- ,
- 巻
- 56
- 号
- 3
- 開始ページ
- 327
- 終了ページ
- 332
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.2320/matertrans.M2014357
- 出版者・発行元
- JAPAN INST METALS
The stress corrosion cracking (SCC) of type 304 stainless steel during a creviced bent beam (CBB) test in a high-temperature, high-pressure water environment was monitored by an optical fiber acoustic emission (AE) sensor. By examining the number and type of cracks formed by different durations of CBB testing an SCC initiation and propagation behavior model was developed. This model was then used to examine the AE event rate, which was found to agree well with the observed changes in the number and size of the cracks formed. Through analysis of the relationship between crack size and AE, the weaker AE signals were assumed to be produced by the initiation of small cracks, whereas the coalescence of cracks produces moderate and large AE signals. On the basis of these findings, it is concluded that the SCC propagation behavior can be reliably estimated from the event rate and amplitude of AE signals.
- リンク情報
- ID情報
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- DOI : 10.2320/matertrans.M2014357
- ISSN : 1345-9678
- eISSN : 1347-5320
- Web of Science ID : WOS:000352512300009