ACOUSTIC EMISSION SIGNAL ANALYSIS FOR ROLLED AZ31B MAGNESIUM ALLOY DURING CORROSION FATIGUE PROCESS

J Chin Soc Corr Pro

2009, Vol. 29

Issue (2): 81-87 DOI:

技术报告

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ACOUSTIC EMISSION SIGNAL ANALYSIS FOR ROLLED AZ31B MAGNESIUM ALLOY DURING CORROSION FATIGUE PROCESS

ZHOU Huamao; WANG Jianqiu; ZHANG Bo; HAN Enhou; ZANG Qishan

Key Laboratory for Corrosion and Protection; Institute of Metal Research;Chinese Academy of Sciences; Shenyang 110016

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Abstract

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.

Key words: AZ31B magnesium alloy corrosion fatigue acoustic emission spectrum analysis

Received: 24 July 2007

ZTFLH:

TG146

Corresponding Authors: WANG Jianqiu E-mail: jiqwang@imr.ac.cn

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Cite this article:

ZHOU Huamao WANG Jianqiu ZHANG Bo HAN Enhou ZANG Qishan. ACOUSTIC EMISSION SIGNAL ANALYSIS FOR ROLLED AZ31B MAGNESIUM ALLOY DURING CORROSION FATIGUE PROCESS. J Chin Soc Corr Pro, 2009, 29(2): 81-87.

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y2009/V29/I2/81

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