scholarly journals Evaluation of Pitting Corrosion Mechanism of AZ31 Magnesium Alloy by Monitoring Acoustic Emission

2017 ◽  
Vol 58 (1) ◽  
pp. 123-126 ◽  
Author(s):  
Hye-Young Kim ◽  
Jae-Yeon Kim ◽  
Seung-Mi Lee ◽  
Jai-Won Byeon
Keyword(s):  
Acoustic Emission ◽  
Magnesium Alloy ◽  
Pitting Corrosion ◽  
Az31 Magnesium Alloy ◽  
Corrosion Mechanism

scholarly journals Acoustic emission generated during the tensile testing of AZ31 magnesium alloy.

1990 ◽  
Vol 40 (7) ◽  
pp. 514-519
Author(s):  
Hajime KATO ◽  
Tatsumi TOZAWA ◽  
Yoshimasa TAKAYAMA
Keyword(s):  
Acoustic Emission ◽  
Magnesium Alloy ◽  
Tensile Testing ◽  
Az31 Magnesium Alloy

Influence of anions, pH and coating on the localized corrosion behavior of AZ31 magnesium alloy in physiological environments

2016 ◽  
Vol 63 (4) ◽  
pp. 301-307 ◽  
Author(s):  
Qian Hu ◽  
Jing Liu ◽  
Feng Huang
Keyword(s):  
Magnesium Alloy ◽  
Corrosion Rate ◽  
Corrosion Behavior ◽  
Substrate Surface ◽  
Electrochemical Techniques ◽  
Az31 Magnesium Alloy ◽  
Localized Corrosion ◽  
Corrosion Mechanism ◽  
Content Type ◽  
Average Corrosion Rate

Purpose The purpose of this paper was to clarify the influence of H2PO4-, HCO3-, pH increase and phosphate coating on corrosion rate and localized corrosion tendency of AZ31 magnesium alloy. Design/methodology/approach The corrosion behavior of AZ31 magnesium alloy in physiological environments was investigated by hydrogen evolution collection measurements, electrochemical techniques and by use of a three-dimensional digital microscope. Findings H2PO4- and HCO3- have corrosion inhibition effects on AZ31 magnesium alloy in normal saline solutions. After immersing for 54 h, the surface undulations decrease from 100 to about 60 μm and 45 μm. The average corrosion rate decreased with increasing pH value. The localized corrosion tendency, however, increased significantly. CaHPO4·2H2O [dicalcium phosphate dehydrate (DCPD)] coating could decrease the initial icorr of AZ31 substrate in Hank’s solution. With partial dissolution of the coating, localized corrosion was readily evident on the AZ31 substrate surface, and a large corrosion pit with depth of over 350 μm appeared. The combined effect of the presence of inhibited ions, the increase in pH during corrosion process and the DCPD coating caused the decrease in the average corrosion rate while enhancing the localized corrosion tendency, resulting in the observed localized attack. Originality/value The paper provides an essential insight into the localized corrosion mechanism of AZ31 magnesium alloy in physiological environments.

Effects of Texture on Tensile Property of Extruded AZ31 Magnesium Alloy Investigated by Acoustic Emission

2013 ◽  
Vol 747-748 ◽  
pp. 340-345
Author(s):  
Chuan Kai Sun ◽  
Hong Yun Luo ◽  
Zhi Yuan Han
Keyword(s):  
Acoustic Emission ◽  
Flow Stress ◽  
Magnesium Alloy ◽  
Yield Strength ◽  
Strain Hardening ◽  
Tensile Property ◽  
Stress Relief ◽  
Deformation Twinning ◽  
Az31 Magnesium Alloy ◽  
Deformation Twins

In this paper, effects of texture on tensile property of extruded AZ31 magnesium alloy are investigated by acoustic emission (AE). The results show that the extruded AZ31 magnesium alloy used in this research has the strong texture of and tensile anisotropy. The yield strength of TD-sample is about 80MPa, which is half of that of ED-sample. AE results show that the AE count of the TD-sample is higher than that of the ED-sample. These AE results suggest that there are more deformation twins in the TD-sample than in the ED-sample. It can be concluded that the deformation twinning can strongly influence the anisotropy, which is mainly due to the flow stress relief induced by twinning and the interaction of twins and dislocations during the strain hardening.

scholarly journals Acoustic emission study of fatigue crack propagation in extruded AZ31 magnesium alloy

2014 ◽  
Vol 597 ◽  
pp. 270-278 ◽  
Author(s):  
Zhiyuan Han ◽  
Hongyun Luo ◽  
Chuankai Sun ◽  
Junrong Li ◽  
Mayorkinos Papaelias ◽  
...  
Keyword(s):  
Acoustic Emission ◽  
Fatigue Crack ◽  
Magnesium Alloy ◽  
Crack Propagation ◽  
Fatigue Crack Propagation ◽  
Az31 Magnesium Alloy ◽  
Emission Study ◽  
Acoustic Emission Study

EFFECT OF SAMPLE ORIENTATION ON STATIC RECRYSTALLIZATION OF AZ31 MAGNESIUM ALLOY

2012 ◽  
Vol 48 (8) ◽  
pp. 915 ◽  
Author(s):  
Hongtao HUANG ◽  
Andrew Godfrey ◽  
Wei LIU ◽  
Ruihe TANG ◽  
Qing LIU
Keyword(s):  
Magnesium Alloy ◽  
Static Recrystallization ◽  
Az31 Magnesium Alloy ◽  
Sample Orientation
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