摘要
氢致开裂是在役压力容器一种常见的失效形式。声发射技术是监测动态破坏过程的有效手段。为了研究压力容器用钢氢致开裂过程的声发射特征,对电解充氢过程中的20R钢进行了监测。试验结果表明,碳钢表面电解充氢并腐蚀的过程和内部氢致裂纹的产生均会对材料的声发射活动产生影响。氢致裂纹的发展过程可分为孕育期和扩展期两个阶段,随着裂纹的生长,高幅声发射信号的数量明显增多。试验结果为压力容器现场检验提供了参考。
Hydrogen Induced Cracking （HIC） is one of failure types of in - service carbon steel pressure vessels. Acoustic emission is a good method to monitor the dynamic break progress. In order to investigate the characteristic of acoustic emission signals produced by HIC of carbon steel used in pressure vessel, the hydrogen charging progress of 20R steel was monitored using acoustic emission instrument. The results proved that observable acoustic activity is an effect of hydrogen charging, corrosion and HIC production in the steel samples. The process of HIC can be divided into two stages, gestation and extending. The amount of high amplitude AE signals were increased obviously with cracking growth. This study provides a reference to pressure vessel inspection on site.
出处
《压力容器》
北大核心
2009年第6期5-8,18,共5页
Pressure Vessel Technology
基金
国家十一五科技支撑计划(2006BAK02B02)
关键词
氢致开裂
声发射
碳钢
压力容器
hydrogen induced cracking
acoustic emission
carbon steel
pressure vessel
