ISSN: 1003-6326
CN: 43-1239/TG

Vol. 27    No. 1    January 2017

Viscous warm pressure bulging process of AZ31B magnesium alloy with different ellipticity dies
Tie-jun GAO, Qing LIU, Wen-zhuo ZHANG
(Faculty of Aerospace Engineering, Shenyang Aerospace University, Shenyang 110136, China)
Abstract: Based on the bulging principle of different ellipticity dies, the methyl vinyl silicone rubber with excellent thermal stability and heat transfer performance was chosen as the viscous medium. The finite element analysis and experiments of viscous warm pressure bulging (VWPB) of AZ31B magnesium alloy were conducted to analyze the influence of different ellipticity dies on the formability of AZ31B magnesium alloy. At the same time, based on the grid strain rule, the forming limit diagram (FLD) of VWPB of AZ31B magnesium alloy was obtained through measuring the strain of bulging specimens. The results showed that at the temperature range of viscous medium thermal stability, the viscous medium can fit the geometry variation of sheet and generate non-uniform pressure field, and as the die ellipticity increases, the difference value of non-uniform pressure reduces. Meanwhile, according to the FLD, the relationship between part complexity and ultimate deformation was investigated.
Key words: AZ31B magnesium alloy; viscous warm pressure bulging; formability; different ellipticity dies; forming limit diagram
Superintended by The China Association for Science and Technology (CAST)
Sponsored by The Nonferrous Metals Society of China (NFSOC)
Managed by Central South University (CSU)