Effect of Ce and Homogeneous Annealing on Microstructure and Deformation Performance of ZM21 Alloy

2015 ◽  
Vol 816 ◽  
pp. 476-480
Author(s):  
Quan Li ◽  
Wei Bo Zhu ◽  
Si Ya Wang ◽  
Xian Quan Jiang ◽  
Fu Sheng Pan

The rare earth element Ce was added in Mg-2.0Zn-1.0Mn magnesium alloys. And the homogenizing treatment and the extrusion deformation tests for the alloy were carried out. The effects of the Ce addition and homogenization on the microstructure and mechanical properties of Mg-2.0Zn-1.0Mn magnesium alloys were studied in the present investigation. The results showed that the addition of Ce can effectively refine the grain size of ZM21 alloy, improve the mechanical properties of magnesium alloy ZM21 and reduce the latent heat and solidification temperature range of the alloy. Homogenizing annealing treatment slightly affected the microstructure and mechanical properties of ZM21 alloy extrusion products but significantly affected the ZM21+Ce magnesium alloy. The fracture analysis indicated that the fracture of the two alloys was mixed fracture, while the fracture of magnesium alloy ZM21+Ce showed more ductile fracture feature.

2014 ◽  
Vol 788 ◽  
pp. 98-102 ◽  
Author(s):  
Zhao Hui Wang ◽  
Xiao Long Zhang ◽  
Shu Bo Li ◽  
Ke Liu ◽  
Wen Bo Du

Grain refinement is important for improving the microstructure and mechanical properties of magnesium alloys. Carbon inoculation is an effective method of grain refinement process for magnesium alloys containing aluminum. In this paper, the C2Cl6 and graphite powder were used as the potential grain refiners for AM60 and AZ91 alloys, respectively. The results show that the microstructure and mechanical properties of these Mg-Al magnesium alloys have been improved with these grain refiners. The mechanism and thermodynamics analyses of grain refinement with carbon inoculation in Mg-Al magnesium alloy have been discussed.


2011 ◽  
Vol 415-417 ◽  
pp. 1096-1102
Author(s):  
Bo Jian Wang ◽  
Yao Dan Zhang ◽  
Shan Li

In this paper, the microstructure and mechanical properties of refine-grain AZ31 magnesium alloy sheets was investigated upon annealing under different temperature. Plasticity and fracture mechanism of refine-grain AZ31 magnesium alloy sheet was discussed.


2014 ◽  
Vol 59 (2) ◽  
pp. 761-765 ◽  
Author(s):  
C. Rapiejko ◽  
B. Pisarek ◽  
T. Pacyniak

Abstract The paper presents the results of the investigation of the effect of Cr and/or V alloy additions on the microstructure and mechanical properties of the magnesium AM60 alloy. The examinations are performed within the frames of a project aiming at the elaboration of an experimental and industrial technology of producing constructively complex elements of machines and devices made of magnesium alloys with the method of investment casting. It has been proven that small numbers of Cr and V alloy additions improve the strength properties: Rm, A%, and the hardness HB of the obtained casts. The experimental casts were made in ceramic molds.


2014 ◽  
Vol 721 ◽  
pp. 799-802
Author(s):  
Quan Li ◽  
Bin Zeng ◽  
Wei Bo Zhu ◽  
Si Ya Wang ◽  
Xian Quan Jiang ◽  
...  

In this paper, Mg-6.0Zn-0.6Zr-1.0Y magnesium alloy for different levels of Zn extrusion test, and after extrusion products for the microstructure and mechanical properties of microscopic analysis, research Zn on Mg-6.0Zn-0.6Zr-1.0Y magnesium alloy extrusion and mechanism of influence of microstructure and mechanical properties, optimize the industrial extrusion products best optimum amount of Zn in Mg-6.0Zn-0.6Zr-1.0Y magnesium alloy.


2012 ◽  
Vol 557-559 ◽  
pp. 13-17
Author(s):  
Rong Wang ◽  
Xiu Rong Zhu ◽  
Gang Chen ◽  
Jing Jiang Nie ◽  
Yong Dong Xu ◽  
...  

The effect of different hydrostatic extrusion ratios on the microstructure and mechanical properties of the ZK60 magnesium alloys were investigated. The results showed that, the major deformation mechanism of the alloy is twinning at room temperature, which resulted in that the tensile strengthen and hardness of the extruded alloy improved greatly. With deformation ratio increasing, the ultimate tensile strengthen and hardness are linearly increased, with the functions of Y= 4.2X+358.3 and Y=2.3X +73.69, respectively. And the maximum tensile strength and hardness of the extruded alloy are 383 MPa and 87HB, respectively. But the elongation decreases obviously, the minimum decreasing degree is 50%. With the deformation ratio increasing, the tendency of elongation rate increased as an “M” model.


2011 ◽  
Vol 686 ◽  
pp. 53-56 ◽  
Author(s):  
Jie Li ◽  
Xian Quan Jiang

The microstructure and mechanical properties of AZ31 magnesium alloys were investigated in this paper. AZ31 magnesium alloys were cryogenically treated at -196°C for 1, 5 and 24 hours, respectively. The results showed the grains of AZ31 were initially refined and grew up with the increase of cryogenic time, the second phase decreased gradually, and the rigidity and tensile strength decreased drastically and then increased. As a result, AZ31 magnesium alloys with 1 hour cryogenic treatment were able to obtain the optimal combination properties.


Author(s):  
Wenxue Fan ◽  
Hai Hao

Abstract Grain refinement has a significant influence on the improvement of mechanical properties of magnesium alloys. In this study, a series of Al–Ti–C-xGd (x = 0, 1, 2, 3) master alloys as grain refiners were prepared by self-propagating high-temperature synthesis. The synthesis mechanism of the Al–Ti–C-xGd master alloy was analyzed. The effects of Al–Ti–C-xGd master alloys on the grain refinement and mechanical properties of AZ31 (Mg-3Al-1Zn-0.4Mn) magnesium alloys were investigated. The results show that the microstructure of the Al–Ti–C-xGd alloy contains α-Al, TiAl3, TiC and the core–shell structure TiAl3/Ti2Al20Gd. The refining effect of the prepared Al–Ti–C–Gd master alloy is obviously better than that of Al–Ti–C master alloy. The grain size of AZ31 magnesium alloy was reduced from 323 μm to 72 μm when adding 1 wt.% Al–Ti–C-2Gd master alloy. In the same condition, the ultimate tensile strength and elongation of as-cast alloy were increased from 130 MPa, 7.9% to 207 MPa, 16.6% respectively.


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