利用全数字声发射系统研究了轧制AZ31B镁合金腐蚀疲劳过程中的声发射信号。结果表明，轧制AZ31B镁合金在NaCl溶液中的腐蚀疲劳过程主要存在4种声发射源, 其中与腐蚀相关的两种信号分别对应于阳极溶解和阴极析氢,前者属于板平面内激励源，产生扩展波信号；后者属于板平面外激励源，产生弯曲波。与载荷相关的两种信号分别对应于塑性变形的连续型信号和裂纹扩展阶段高载荷阶段出现的裂纹扩展信号。腐蚀相关的声发射信号存在于整个疲劳过程，而塑性变形信号只发生在疲劳过程中特定的应力阶段。
Acoustic emission (AE) signals during corrosion fatigue of a rolled AZ31B magnesium alloy were studied. There were mainly four types of signals found in the corrosion fatigue process. Two types of AE signals corresponded respectively to anodic dissolution and cathodic hydrogen evolution appeared in a whole loading cycle. The signals of anodic dissolution belonged to the sources in plate produced extensive waveform, while the signals of cathodic hydrogen evolution belonged to the sources out of plate produced flexural waveform.Another two types of AE signals were corresponded to mechanical signals. One was the signals of plastic deformation which were continuous signal and appeared at the certain stress stage in a loading cycle. At the stage of crack propagation, crack propagation signals appeared at high stress loading part of each cycle.
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