Special Features of the Effect of Flux-Free Melting on the Structure and Properties of Magnesium Alloy VMD16 in Cast Condition

2021 ◽  
Author(s):  
E. F. Volkova ◽  
I. V. Mostyaev ◽  
M. V. Akinina ◽  
A. A. Alikhanyan
Keyword(s):  
Magnesium Alloy ◽  
Structure And Properties ◽  
Cast Condition

scholarly journals structure and properties of additively manufactured WE43 magnesium alloy

2019 ◽  
Author(s):  
Patrícia KRIŠTOFOVÁ ◽  
Jiří KUBÁSEK ◽  
Michaela ROUDNICKÁ ◽  
Alena MICHALCOVÁ ◽  
Jan SUCHÝ ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Structure And Properties ◽  
We43 Magnesium Alloy

Structure and Properties of Anodized Films Formed on AZ91D Magnesium Alloy

2011 ◽  
Vol 66-68 ◽  
pp. 1586-1591
Author(s):  
Jian San Li ◽  
Jun Quan Liu
Keyword(s):  
Magnesium Alloy ◽  
Current Density ◽  
Potentiodynamic Polarization ◽  
Solution Structure ◽  
Solution Temperature ◽  
Anodic Current Density ◽  
Polarization Analysis ◽  
Structure And Properties ◽  
Anodic Current ◽  
Az91d Magnesium Alloy

Anodized films on AZ91D magnesium alloy were prepared in sodium hydroxide based solution. Structure and properties of the anodized films were investigated by X-ray diffraction (XRD), scanning electron microscope (SEM) and electrochemical potentiodynamic polarization analysis. The results of XRD showed that the films were mainly composed of Mg(OH)2and Al(OH)3. As the solution temperature increasing, the anodized films became thicker and denser, which could cover up the substrate. The films also became thicker and denser with the increase of anodizing time. The grain in the films grew fast when anodic current density increasing and a larger grain size would be found at a higher anodic current density. The results of microscopic analysis exhibited the porous-type anodic oxide, which was similar to the films on aluminum alloy. The results of electrochemical potentiodynamic polarization analysis showed that thermodynamic stability of the alloy had a certain improvement after anodization. The anodized films also exhibited an obvious increase of polarization resistanceRPand an obvious decrease of corrosion current densityic. Discoloration time of drop test on the films lasted for 30 min, which indicated that corrosion resistance of the magnesium alloy was greatly improved by anodization.

scholarly journals Microstructure of Mg–Al–RE-type Experimental Magnesium Alloy Gravity Cast into Sand Mould

2016 ◽  
Vol 16 (2) ◽  
pp. 115-118 ◽  
Author(s):  
K.N. Braszczyńska-Malik ◽  
E. Przełożyńska
Keyword(s):  
Electron Microscopy ◽  
Magnesium Alloy ◽  
Intermetallic Phase ◽  
Intermetallic Phases ◽  
Equilibrium Solidification ◽  
Alloy Microstructure ◽  
Sand Mould ◽  
Cast Condition ◽  
Gravity Cast ◽  
Scanning Electron

Abstract Magnesium alloy with 5 wt% Al, 0.35 wt% Mn and 5 wt% rare earth elements (RE) was prepared and gravity cast into a sand mould. Microstructure investigations were conducted. Analyses of the Mg-Al-RE alloy microstructure were carried out by light microscopy, scanning electron microscopy and the XRD technique. In the as-cast condition, the alloy was composed of α-Mg, Al11RE3 and Al10RE2Mn7 intermetallic phases. Additionally, due to non-equilibrium solidification conditions, an Al2RE intermetallic phase was revealed.

Structure and Properties of Interlayer Formed between Magnesium Alloy Core and Aluminium Alloy Coating during Deformation

2014 ◽  
pp. 285-288
Author(s):  
Sonia Boczkal ◽  
Piotr Korczak ◽  
Bartłomiej Płonka ◽  
Wojciech Szymański ◽  
Marek Nowak
Keyword(s):  
Magnesium Alloy ◽  
Aluminium Alloy ◽  
Alloy Coating ◽  
Structure And Properties

Structure and Properties of Interlayer Formed Between Magnesium Alloy Core and Aluminium Alloy Coating During Deformation

2014 ◽  
pp. 285-288
Author(s):  
Sonia Boczkal ◽  
Piotr Korczak ◽  
Bartłomiej Płonka ◽  
Wojciech Szymański ◽  
Marek Nowak
Keyword(s):  
Magnesium Alloy ◽  
Aluminium Alloy ◽  
Alloy Coating ◽  
Structure And Properties

DSC and Microstructural Investigations of the Elektron 21 Magnesium Alloy

2010 ◽  
Vol 638-642 ◽  
pp. 1447-1452 ◽  
Author(s):  
Andrzej Kiełbus ◽  
Tomasz Rzychoń ◽  
Roman Przeliorz
Keyword(s):  
Heat Treatment ◽  
Solid Solution ◽  
Magnesium Alloy ◽  
Solution Heat Treatment ◽  
Casting Alloy ◽  
Solution Hardening ◽  
Ageing Treatment ◽  
Aerospace Application ◽  
Different Temperatures ◽  
Cast Condition

The paper presents the results of DSC and microstructural investigations of Elektron 21 magnesium alloy in as cast condition and after solution hardening. Elektron 21 is a magnesium based casting alloy containing neodymium and gadolinium for used to at 200°C in aerospace application. The solution heat treatment was performed at 520°C/8h/water. Ageing treatment was performed at different temperatures 200, 250, 300 and 350°C, then quenched in air. The microstructure of Elektron 21 in as cast condition consists of primary solid solution α -Mg grains with eutectic α-Mg + Mg3(Nd,Gd) phase and regular precipitates of MgGd3 phase. After DSC investigations three exothermal signals has been observed. First exothermal signal at ~170÷245°C assigned to an undifferentiated formation of the metastable phases β” and β’ and the second one at ~280°C corresponded to the formation of a stable β (Mg3Nd) phase. The last signal at ~300°C was connected to the formation of Mg41Nd5 phase. Regular precipitates of MgGd3 phase have been also observed. TEM investigation confirmed that the Elektron 21 alloy precipitate from the solid solution according to the sequence of the following phases: α–Mgβ”β’β(Mg3Nd)Mg41Nd5

The Influence of High-Temperature Heat Treatment on the Microstructure of Mg-5Al-3Ca-0.7Sr-0.2Mn Magnesium Alloy

2013 ◽  
Vol 203-204 ◽  
pp. 246-249 ◽  
Author(s):  
Tomasz Rzychoń
Keyword(s):  
Heat Treatment ◽  
Solid Solution ◽  
High Temperature ◽  
Magnesium Alloy ◽  
Magnesium Alloys ◽  
Precipitation Process ◽  
High Temperature Heat Treatment ◽  
Temperature Heat ◽  
Cast Condition ◽  
Temperature Heat Treatment

The paper presents results of microstructural investigations of Mg-5Al-3Ca-0.7Sr-0.2Mn (ACJM53) magnesium alloys in the as-cast condition and after heat treatment at 450°C for 4.5 hours. Two kinds of transformation were observed in ACJM53 alloy after heat treatment: (Mg,Al)2Ca (C36) → Al2Ca (C15) and Al3Mg13(Sr,Ca) → Mg17(Sr,Ca)2 transformations without the change in morphology of output compounds. Morphology of Mg2Ca (C14) have been changed from fine lamellar to globular and precipitation process of Al2Ca (C15) phase inside the grains of solid solution was found.

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