轧制AZ31B镁合金腐蚀疲劳过程中的声发射信号分析

中国腐蚀与防护学报

2009, Vol. 29

Issue (2): 81-87

研究报告

本期目录 | 过刊浏览

轧制AZ31B镁合金腐蚀疲劳过程中的声发射信号分析

周华茂;王俭秋 ;张波;韩恩厚;臧启山

中国科学院金属研究所金属腐蚀与防护国家重点实验室沈阳 110016

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

全文: PDF(647 KB)

摘要:

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。

关键词 ： AZ31B镁合金, 腐蚀疲劳, 声发射, 频谱分析

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

收稿日期: 2007-07-24

ZTFLH:

TG146

基金资助:

国家重点基础研究发展规划项目(2007CB613705)

通讯作者: 王俭秋 E-mail: jiqwang@imr.ac.cn

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

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引用本文:

周华茂王俭秋张波韩恩厚臧启山. 轧制AZ31B镁合金腐蚀疲劳过程中的声发射信号分析[J]. 中国腐蚀与防护学报, 2009, 29(2): 81-87.
ZHOU Hua-Mao. ACOUSTIC EMISSION SIGNAL ANALYSIS FOR ROLLED AZ31B MAGNESIUM ALLOY DURING CORROSION FATIGUE PROCESS. J Chin Soc Corr Pro, 2009, 29(2): 81-87.

链接本文:

https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y2009/V29/I2/81

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