Al–Mn–Fe intermetallic formation in AZ91 magnesium alloys: Effects of impurity iron

The microstructures and corrosion resistance of AZ91 and AZ91+0.5 wt.% erbium (Er) magnesium alloys were studied, respectively. The results show that the Er addition in scrap AZ91 magnesium alloy can improve the corrosion resistance, markedly. The discontinuous precipitation phase (DPP) for Mg17Al12was retarded and the amount of DPP was decreased by 41% due to the formation of Al8ErMn4phase during solidification. The amount of continuous precipitation phase (CPP) in grains was decreased by 8% because of the formation of Al7ErMn5phase during solidification.

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Corrosion and Protection of Magnesium Alloys

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1120-1121.1078 ◽

2015 ◽

Vol 1120-1121 ◽

pp. 1078-1082 ◽

Cited By ~ 2

Author(s):

Yang Yang Lv ◽

Ling Feng Zhang

Keyword(s):

Corrosion Resistance ◽

Magnesium Alloy ◽

Magnesium Alloys ◽

Automotive Industry ◽

Physical And Mechanical Properties ◽

Current Status ◽

Strain Rates ◽

Metallic Materials ◽

Az91 Magnesium Alloy ◽

Az91 Magnesium

Magnesium alloy as a green material in the 21st century, because of its excellent physical and mechanical properties of metallic materials as an ideal in the automotive industry, electronic industry and aviation, aerospace and other industries[1]. However, poor corrosion resistance of magnesium alloys become an important issue hinder application of magnesium alloys[2]. So magnesium alloy corrosion problems and the current status of research paper reviews several magnesium alloy protection methods at home and abroad, and also highlighted with our latest laser shock (LSP) study of AZ91 magnesium alloy at high strain rates of corrosion resistance results.

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Magnesium Alloys as Biodegradable Implants

Materials Science Forum ◽

10.4028/www.scientific.net/msf.618-619.83 ◽

2009 ◽

Vol 618-619 ◽

pp. 83-86

Author(s):

M. Bobby Kannan ◽

R.K. Singh Raman

Keyword(s):

Magnesium Alloy ◽

Magnesium Alloys ◽

Electrochemical Impedance ◽

Alkali Treatment ◽

Test Sample ◽

Az91 Magnesium Alloy ◽

Biodegradable Implant ◽

Degradation Behaviour ◽

Az91 Magnesium

In this study, an attempt was made to enhance the degradation resistance of magnesium alloys for potential biodegradable implant applications through surface treatment. AZ91 magnesium alloy was taken as the test sample and was alkali-treated for two different periods of time and then the in vitro degradation behaviour of the alloy was studied using electrochemical impedance spectroscopy and polarization techniques in simulated body fluid. The study suggests that alkali-treatment reduces the degradation rate in AZ91 magnesium alloy.

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