Press Forming Technology Using Superplastic Deformation for Mg Alloy Sheet

Abstract:

The square-cylindrical cup of AZ31 Mg alloy with a depth of 50mm and a width of 50 mm was successfully deep drawn from a rolled sheet with a thickness of 0.5 mm using a hydraulic press machine with a capacity of 60 tons. The blank was heated between the die and the blank holder kept in a temperature of 300 oC .The forming time was about 3 seconds. The fine-grained microstructure was observed at the corner with a sever strain. The grain refinement caused by the dynamic recrystallization contributed to generate high strain-rate superplasticity.

• Periodical: Materials Science Forum (Volumes 488-489)
• Pages: 571-574
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.488-489.571
• Online since: July 2005
• Authors: Hiroyuki Fujii, Hajime Iwasaki, Jacky Kazuo Araki
• Keywords: AZ31 Alloy, Dynamic Recrystallization (DRX), Press Forming, Superplastic Deformation

References

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DOI: 10.2320/matertrans.43.2437

[4] W. J. Liu et al., Magnesium Technology 2004, ed. by A. A. Luo, TMS, 2004, p.73. At the corner At the straight 10 mm from the bottom 10 µm Average grain size.

[8] 0 µm.

[12] 5 µm.

[5] 0 µm.

[6] 0 µm 20 mm 40 mm.

[5] 6 µm 4. 5 µm Fig. 6 Microstructures of the cup at the straight and the corner.