Effects of manganese and rare earth elements on the microstructural evolution and deformation behaviour of the anode materials of AZ61 magnesium alloy

2013 ◽  
Vol 9 (3/4) ◽  
pp. 286
Author(s):  
Ruixiao Qu ◽  
Wenbo Cao ◽  
Zhidan Liu ◽  
Qingkui Li ◽  
Shaokang Guan
Keyword(s):  
Rare Earth ◽  
Magnesium Alloy ◽  
Rare Earth Elements ◽  
Microstructural Evolution ◽  
Anode Materials ◽  
Deformation Behaviour ◽  
Az61 Magnesium Alloy

Study on Aging Strengthening Behavior of ZK60 -2.0%Nd-1.0%Y Alloy

2010 ◽  
Vol 34-35 ◽  
pp. 1651-1655
Author(s):  
An Ru Wu ◽  
Li Jun Dong ◽  
Wei Guo Gao ◽  
Xiang Ling Zhou
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Rare Earth ◽  
Magnesium Alloy ◽  
Rare Earth Elements ◽  
Aging Process ◽  
Equilibrium Phase ◽  
High Strength ◽  
Treatment Method ◽  
Zk60 Alloy

The microstructure and mechanical properties of Mg-6.0%Zn-0.5%Zr (ZK60) and ZK60-2.0%Nd-1.0%Y alloys after extrusion, rolling and then T5 and T6 heat-treatment were investigated. The hardness and tensile strength at T5 and T6 condition were tested. The results show that the mechanical properties of ZK60--2.0%Nd-1.0%Y alloy are superior to that of ZK60 alloy. The hardness of the investigated alloy at T5 condition is higher than at T6. The strengthening of ZK60-2.0%Nd-1.0%Y alloy originates from the interaction of phase and dislocations. The precipitation order of ZK60-2.0%Nd-1.0%Y alloy is GP zone . The magnesium alloy contains rare earth elements with good casting performance, great potential for plastic deformation, high strength, excellent mechanical properties and many other advantages. The magnesium alloy oversaturation solid solution's decomposition process conforms to time the common alloy oversaturation solid solution decomposition order rule, often namely before separating out the equilibrium phase presents some transitional stage the structure, like the GP area, the transition are equal, but the different series magnesium alloy presents the different characteristic, therefore uses the heat treatment method also has big difference [1-5]. In this paper, we will analysis mechanical properties of aging process of testing and microstructure of Mg-6.0% Zn-0.5% Zr-2.0% Nd-1.0% Y alloy , do Research about strengthen the effect of melting and from the product of the relationship on different alloy aging process, and analysis contribution of rare earth elements Nd, Y to alloy strengthen.

scholarly journals THE EFFECT OF RARE EARTH ELEMENTS ON Cr PRECIPITATIONS IN A Cu-0.8WT%Cr ALLOY

2011 ◽  
Vol 23 (2) ◽  
pp. 137 ◽  
Author(s):  
Gewang Shuai ◽  
Meng Zhang ◽  
Yongli Yan
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Aging Time ◽  
Microstructural Evolution ◽  
Volume Fraction ◽  
Optical Microscope ◽  
Geometric Parameters ◽  
Solution Treated ◽  
Mean Diameter ◽  
Metallographic Method

The microstructural evolution of Cu-based alloys during aging was studied using a quantitative metallographic method. Samples were cut from ingots of Cu-0.8wt%Cr and Cu-0.8wt%Cr-RE alloys. These were solution treated at 1000 ºC for 1.5h and subsequently quenched in water, then separately aged at 480 ºC for different durations. The microstructures were observed by optical microscope, and the characteristic geometric parameters of precipitated Cr phase, including volume fraction VV, face density NA, mean diameter and roundness, were measured. These data provided more details about the process of aging. The results showed that precipitation of Cr phase occurred in the form of particles during aging. Rare earth elements promoted the precipitation of Cr phase and dispersed Cr particles. The phenomenon of overaging came earlier in Cu-Cr-RE than in Cu-Cr. In the present work, the optimal aging time at 480 ºC was 2 hrs for the Cu-0.8wt%Cr-RE alloy and 3 hours for the Cu-0.8wt%Cr alloy.

scholarly journals Types of Component Interfaces in Metal Matrix Composites on the Example of Magnesium Matrix Composites

Materials ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5182
Author(s):  
Katarzyna N. Braszczyńska-Malik
Keyword(s):  
Rare Earth ◽  
Magnesium Alloy ◽  
Rare Earth Elements ◽  
Matrix Composites ◽  
Magnesium Matrix ◽  
Magnesium Matrix Composites ◽  
Transmission Electron ◽  
The Matrix ◽  
Ti Particles ◽  
Cast Magnesium

In this paper, a summary of investigations of the microstructure of cast magnesium matrix composites is presented. Analyses of the interfaces between the reinforcing particles and the magnesium alloy matrices were performed. Technically pure magnesium and four various alloys with aluminum and rare earth elements (RE) were chosen as the matrix. The composites were reinforced with SiC and Ti particles, as well as hollow aluminosilicate cenospheres. Microstructure analyses were carried out by light, scanning, and transmission electron microscopy. The composites with the matrix of magnesium and magnesium–aluminum alloys with SiC and Ti particles exhibited coherent interfaces between the components. In the composites based on ternary magnesium alloy with Al and RE with Ti particles, a high-melting Al2RE phase nucleated on the titanium. Different types of interfaces between the components were observed in the composites based on the magnesium–rare earth elements alloy with SiC particles, in which a chemical reaction between the components caused formation of the Re3Si2 phase. Intensive chemical reactions between the components were also observed in the composites with aluminosilicate cenospheres. Additionally, the influence of coatings created on the aluminosilicate cenospheres on the bond with the magnesium matrix was presented. A scheme of the types of interfaces between the components is proposed.

Effect of Re Addition on the Ignition Resistance of Pure Magnesium

2014 ◽  
Vol 788 ◽  
pp. 88-92 ◽  
Author(s):  
Jian Ding ◽  
Zheng Fang ◽  
Lin Qin ◽  
Wei Min Zhao
Keyword(s):  
Rare Earth ◽  
Magnesium Alloy ◽  
Oxide Film ◽  
Rare Earth Elements ◽  
Oxidation Resistance ◽  
Rare Earth Oxide ◽  
Pure Magnesium ◽  
Ignition Point ◽  
The Rare Earth

This paper focus on the effect of rare earth elements addition on the oxidation resistance of pure magnesium. The results show that the ignition points of the Mg-RE alloys vary like “V” along with the increase of the rare earth elements. When the content of Y reaches 10wt%, the ignition point of magnesium alloy is 890K, about 40K higher than the ignition point of pure magnesium. After the addition of rare earth elements, dense oxide film forms on the surface of Mg-RE alloys. The outer oxidation film mainly consists of rare earth oxide.

Microstructure of AZ61 Magnesium Alloy by Equal Channel Angular Extrusion

2014 ◽  
Vol 692 ◽  
pp. 315-319
Author(s):  
Dan Wu ◽  
Ya Lin Lu ◽  
Xing Cheng Li ◽  
Wen Ting Xu ◽  
Guo Yan Chen
Keyword(s):  
Magnesium Alloy ◽  
Microstructural Evolution ◽  
Deformation Temperature ◽  
Equal Channel Angular Extrusion ◽  
Good Property ◽  
Az61 Magnesium Alloy ◽  
Angular Extrusion ◽  
Lower Temperature

Microstructural evolution of AZ61 magnesium alloy was analyzed after ECAE process. This research focused on the effects of deformation temperature and extrusion passes on microstructure of AZ61 magnesium alloy. The results showed that microstructure have not improved significantly at the lower temperature. Grains can be refined greatly at deformation temperature of 370°C. With an increase of extrusion passes, grains tend to be much refined, which is beneficial to obtaining good property.

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