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The strength loss resulting from hydrogen induced cracking (HIC) has been known to cause several serious failures in refineries and other plants. The study of this cracking mode using only electrochemical techniques is not fully efficient for the detection and control on line of this phenomenon. The technique using acoustic emission (AE) to detect defects in pressure vessels on line has been significantly...
Hydrogen Induced Cracking (HIC) is one of failure types of in-service pressure vessels. Acoustic emission (AE) is a good method to monitor HIC. In order to investigate the characteristic of AE signals produced by HIC of carbon steel used in pressure vessel, the hydrogen charging progress of 20R steel was monitored using AE technique. There were three useful AE sources during the test, corrosion and...
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