摘要
对氢蚀前后低碳钢拉伸过程中的声发射（ＡＥ）行为进行了研究．结果表明，氢蚀使低碳钢拉伸过程事件数明显减少，但是高幅声发射信号的振铃计数明显增多．声发射源以显微裂纹长大与连接为主．
Acoustic emission(AE) behaviour of low-carbon steel samples,which have been attacked upon exposure to hydrogen of 18MPa at temperatures 450℃ and 500℃ for 240,480 and 720 hours respeCtively,was studied during tensile tests.The experimental results showed that hydrogen attack decreased AE activity,but the count of high amplitude AE signals increased.The AE signajs originated from intergranular fraCture caused by coalescence of the micro-bubbles or microcracks on the grain boundaries.
出处
《中国腐蚀与防护学报》
CAS
CSCD
1994年第4期304-310,共7页
Journal of Chinese Society For Corrosion and Protection
关键词
氢蚀
低碳钢
声发射
拉伸试验
腐蚀
Low-carbon steel
Hydrogen attack
Acoustic emission
Tensile
