Combination of differential temperature drawing and superplastic bulging;

Research on Design and Implement of a Pressure-Time Curve Controlled Superplastic Bulging System;

On the basis of the rigid visco-plastic FEM technique,the numerical simulation of the cavity-damage evoluation process during superplastic bulging process was carried out using the model of cavity-damage evolution deduced from continuous damage mechanics.

In order to shorten forming time and to achieve uniform thickness of parts in superplastic bulging of void-sensitive materials, it is well known that maximum effective strain rate should be kept within a very small range.

Therefore, there will be more practical significance on its practical application to the expansion of the scope of a more complex shape of magnesium alloy parts, whether or not it has superplasticity study under certain conditions using superplastic bulging forming.

However, up to now, the theoreticalanalysis for the superplastic constrained bulging has only a few research reports.

The properties,classification and characteristics of magnesium alloys are discussed,and the magnesium alloy material and the related smelting techniques are described including cast,mechanicle process,plastic forming,superplastic forming technologies,the present questions of our nation's magnesium industry are discussed too,the superiority and prospect for future are indicated finally.

The properties of bulk amorphous alloys,especially the superplastic forming property in the supercooled liquid region are summarized.