Abstract
The magnesium alloy has advantage in strength per mass and it has been widely used on airplane, aerospace, computer, cellphone and automobile industries. However, forming of magnesium alloy plate at the room temperature is very difficult, because it has a dense hexagonal and the basal sliding is easy to happen conspicuously in comparison with other sliding system. We considered that those weak characteristics are reduced by high strain rate forming. Therefore, magnesium alloy forming using shock wave by metal wire electric discharge has been carried out. Thin aluminum alloy was used as the metal wire. Electricity is supplied to this wire from power supply with Marx circuit. The aluminum wire set underwater and it has instantly molten vaporization, then, the underwater shock wave was generated. The shock loading by the underwater shock wave acts to the magnesium alloy plate. The magnesium alloy plate was AZ31(Al 3%, Zn 1%). In this study, the target is bulge forming of the magnesium alloy plate. Then, some numerical simulations were carried out. These results will be discussed in this paper.
Highlights
In recent years, magnesium alloys have been widely used as structural metal materials because of their low specific gravity, and are widely used in the fields of automobiles, airplane, aerospace and portable devices such as cases of smartphones and tablet PCs
In order to achieve the expansion of utilization of magnesium alloys, it is necessary to improve the quality and plastic working for reducing costs, which are commonly performed in metal processing, and the development of forming processing techniques for magnesium alloy sheet materials is expected
When experiments were conducted with two types of aluminum thin wire diameters of 0.5 and 0.7 mm, no major relationship was found between the diameter of the thin wire and the maximum forming depth of AZ31
Summary
Magnesium alloys have been widely used as structural metal materials because of their low specific gravity, and are widely used in the fields of automobiles, airplane, aerospace and portable devices such as cases of smartphones and tablet PCs. the range of use has been expanding. The advantages of using a magnesium alloy include a large ratio of strength to specific gravity, good machinability, excellent vibration absorption, good electromagnetic wave shielding performance, and abundant magnesium resources. Plastic deformation and extrusion of magnesium alloy sheets are difficult. In order to achieve the expansion of utilization of magnesium alloys, it is necessary to improve the quality and plastic working for reducing costs, which are commonly performed in metal processing, and the development of forming processing techniques for magnesium alloy sheet materials is expected
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