Finite element analysis of superplastic blow forming of fine-grained magnesium alloy sheet

2011 ◽  
Author(s):  
Yandong Yu ◽  
Peng Jiang ◽  
Yuan Zhuang ◽  
Huiyan Ning
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Magnesium Alloy ◽  
Alloy Sheet ◽  
Element Analysis ◽  
Magnesium Alloy Sheet ◽  
Fine Grained

Effect of Microstructure on Hot Bulging Deformation for AZ31 Magnesium Alloy Sheet with Resistance Heating

2014 ◽  
Vol 783-786 ◽  
pp. 537-540
Author(s):  
Kai Feng Zhang ◽  
Jing Yuan Liu ◽  
Chao Li
Keyword(s):  
Magnesium Alloy ◽  
Pulse Current ◽  
Alloy Sheet ◽  
Az31 Magnesium Alloy ◽  
Coarse Grained ◽  
Wind Force ◽  
Magnesium Alloy Sheet ◽  
Fine Grained ◽  
Az31 Magnesium Alloy Sheet ◽  
Electron Wind

To enhance the heating efficiency and the formability of AZ31 magnesium alloy, the assistance heating method is adopted during the hot bulging process. The free bulging test of coarse grained and fine grained AZ31 magnesium alloy sheet was carried out. During the forming process, the effects of pulse current on the formed sheet combine both thermoelectricity and electro-plasticity. Directional and asymmetrical deformation of the coarse-grained AZ31 magnesium alloy sheet by the effect of pulse current is observed and analyzed. But in the same processing condition, the deformation of fine grained AZ31 magnesium alloy sheet is symmetrical. To investigate the influence of electron wind force on pulse current auxiliary bulging process, the simulation of AZ31 magnesium alloy pulse current auxiliary bulging based on the electron wind force value calculated by mathematical model was performed using the Marc software. The bulging simulation result showed a special phenomenon that the shape of the bulging specimen is unsymmetrical and the dome deviated from the symmetry axis to the side of positive pole. The simulation results were basically consistent with the experimental results. The deformation properties, microstructure characteristics, dislocation movement of the AZ31 magnesium alloy during gas bulging processing by the pulse current are investigated.

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