金属点蚀过程声发射源机制研究  

Studies on the source mechanism of acoustic emission produced by pitting corrosion

作　　者：耿荣生[1] 傅刚强[1] 

机构地区：[1]北京航空工程技术研究中心,北京100076

出　　处：《声学学报》2002年第4期369-372,共4页Acta Acustica

基　　金：国家重点基础研究专项经费资助(G19990650)

摘　　要：研究了腐蚀特别是点蚀过程产生应力波,即声发射(ＡＥ)的源机制,估算了单个钝化膜破裂所产生的薄板表面位移量级,并用实验进行了论证。作者提出,利用板波声发射理论加上参数识别方法,可将腐蚀过程产生的声发射信号同背景噪声相区别。Studies have been made on the source mechanism of acoustic emission produced by pitting corrosion. Methods for identifying pitting corrosion-related AE signals were proposed and the magnitude of surface displacement due to single pitting was estimated. It is concluded that differentiation between background noise and corrosion induced genuine AE signal is possible through using plate wave acoustic emission theory combined with parameter identification.

关 键 词：金属 点蚀过程 声发射 源机制 腐蚀 参数识别 应力波 

分 类 号：TG172[金属学及工艺—金属表面处理]