Effect of electromagnetic stirring and solution treatment on microstructure and properties of AZ31 magnesium alloy

2019 ◽  
Vol 50 (4) ◽  
pp. 454-461
Author(s):  
J.C. Bian ◽  
B.Y. Yu ◽  
L. Zheng ◽  
B. Wang ◽  
W.J. Shi ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Solution Treatment ◽  
Electromagnetic Stirring ◽  
Az31 Magnesium Alloy ◽  
Microstructure And Properties

Refinement Effect and Mechanism of AZ31 Magnesium Alloy by Electromagnetic Stirring under the Effect of Grain-Refiner

2013 ◽  
Vol 631-632 ◽  
pp. 556-561 ◽  
Author(s):  
Sheng Yuan Gao ◽  
Shi Lian Qu ◽  
Yue Yuan ◽  
Bao Qin Fu
Keyword(s):  
Grain Size ◽  
Magnesium Alloy ◽  
Heterogeneous Nucleation ◽  
Holding Time ◽  
Electromagnetic Stirring ◽  
Az31 Magnesium Alloy ◽  
Grain Refiner ◽  
Nucleation Sites ◽  
Continuously Cast ◽  
Refinement Effect

The effects of electromagnetic stirring and Al4C3grain refiner on the grain refinement of semi-continuously cast AZ31 magnesium alloy were discussed in this investigation. The results indicate that electromagnetic stirring has effective refining effect on the grain size of AZ31 magnesium alloy under the effect of Al4C3grain refiner. Electromagnetic stirring can “activate” the Al4C3particles, resulting in more heterogeneous nucleation sites for the primary α-Mg grains. But, longer holding time can “inactivate” the Al4C3particles, and the optimal experimental holding time is 60 min in the present investigation. The activated rate of the electromagnetic under the experimental condition ρ2=1.65%.

Research on Technology and Microstructure Performance in Profile Extrusion of AZ31 Mg-Alloy

2005 ◽  
Vol 488-489 ◽  
pp. 519-522
Author(s):  
Qiang Wang ◽  
Bao Cheng Li ◽  
Zai-xin Feng
Keyword(s):  
Magnesium Alloy ◽  
Dimensional Accuracy ◽  
High Strength ◽  
Az31 Magnesium Alloy ◽  
Technological Parameters ◽  
Zone Length ◽  
Microstructure And Properties ◽  
Fine Grain ◽  
Az31 Mg Alloy ◽  
Cast Alloys

Aimed at characteristics of the profile such as complex shape, high dimensional accuracy and mechanical properties, the reduction zone length and devided flow taper of female die were designed by FEM and extrusion experiments were carried out for as-cast AZ31 magnesium alloy. Technological parameters were determined and microstructure and properties of the extruded profile were examined. The results show that magnesium alloy profile can be extruded if technological parameters such as deformation temperature, tool temperature and ratio of extrusion are controlled strictly. Each of the above mentioned technological parameters has its different influence on microstructure and properties of extruded profile. In comparison with as-cast alloys, microstructure is refined from 120～140μm to about 10μm and tensile strength is enhanced from 171～200MPa to above 260Mpa. This suggests that fine grain and high strength are attained for AZ31 magnesium alloy by extrusion deformation. The extruded profile can meet high properties demands for carrying parts. It provides a possibility for broader usage of magnesium alloy profiles.

Influence of Annealing Temperature on Microstructure and Properties of Warm-Rolled AZ31 Magnesium Alloy Sheets

2013 ◽  
Vol 747-748 ◽  
pp. 352-358
Author(s):  
Hua Zhang ◽  
Guang Sheng Huang ◽  
Jin Han Lin ◽  
Li Fei Wang
Keyword(s):  
Magnesium Alloy ◽  
Strain Hardening ◽  
Annealing Temperature ◽  
Az31 Alloy ◽  
Az31 Magnesium Alloy ◽  
Strain Hardening Exponent ◽  
N Value ◽  
Microstructure And Properties ◽  
Different Temperatures ◽  
R Value

Warm-rolled AZ31 alloy sheets were annealed at different temperatures ranging from 150 to 450°C. Effects of annealing temperature on microstructure and properties of warm-rolled AZ31 alloy sheets, especially the formability, were investigated. The results revealed that the Lankford value (r-value) and strain-hardening exponent (n-value) first increased and then became relatively steady with the increase of annealing temperature. The Erichsen value (IE) first increased and then decreased with the increase of annealing temperature and the AZ31 alloy sheets exhibited the highest IE of 3.02 mm when annealing at 250°C, which can be mainly attributed to a larger elongation, a lower r-value and a higher n-value.

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