EFFECT OF ALUMINUM CONTENT AND PRECIPITATION ON THE CORROSION BEHAVIOR AND ACOUSTIC EMISSION RESPONSE OF AZ31 AND AZ80 MAGNESIUM ALLOYS

被引：0
|
作者：
Veverkova, Eliska [1 ]
Knapek, Michal [1 ,2 ]
Minarik, Peter [1 ]
机构：
[1] Charles Univ Prague, Dept Phys Mat, Prague, Czech Republic
[2] Czech Acad Sci, Nucl Phys Inst, Rez, Czech Republic
来源：
28TH INTERNATIONAL CONFERENCE ON METALLURGY AND MATERIALS (METAL 2019) | 2019年
关键词：
Magnesium alloys; corrosion; acoustic emission; polarization; AZ91;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this study, we investigated the effect of aluminum content and precipitation on the corrosion behavior of the AZ31 and AZ80 magnesium alloys. The investigated alloys were received in the as-extruded condition in order to retain comparable grain size and texture. First, solid solution treatment was performed on the samples of both alloys. Subsequently, the samples were isothermally aged at 200 degrees C for 20 hours. The scanning electron microscopy was used to study the grain size and microstructure. The corrosion properties of samples were studied by potentiodynamic polarization measurements and the AE signal was concurrently recorded. Solution treated AZ80 and AZ31 samples exhibited similar behavior. The aged AZ80 sample showed lower corrosion rate. Also, a strong breakdown appeared in the later (compared to other samples) stage of the potentiodynamic test. The breakdown was found to be easily recognized by AE parameters.
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页码：1732 / 1737
页数：6
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