Formability of magnesium alloy plate

Magnesium and its magnesium alloys have many advantages, such as light weight, good heat and conductivity, damping and shock absorption, electromagnetic shielding, etc., which have broad application prospects in the fields of transportation, communication, electrical appliances, aerospace and so on. However, due to the densely packed hexagonal (HCP) crystal structure of magnesium alloy plate, there are few independent slip systems at room temperature, resulting in low plasticity at room temperature and difficult deformation processing, which has become a bottleneck problem hindering large-scale application of magnesium alloy materials. This paper will look at the formability of magnesium alloy plate.

Magnesium alloy sheet plastic deformation formability, magnesium alloy plastic forming main methods are extrusion, rolling, forging and isothermal superplastic forming, his plastic forming depends on two independent factors, that is, the nature of the material and plastic deformation of the force state. The stress state during material deformation is unique to a processing common good and has nothing to do with the characteristics of the material itself. For example, the extruded deformation material is subjected to the three-way stress state in the deformation area, which is conducive to the plastic deformation of the material, that is, the material has better formability under this deformation condition. In the same way, reasonable design of rolling pass and reasonable design of ingot force (closed die forging or close die forging) can optimize the stress of magnesium alloy in the deformation process, and play a positive role of compressive stress in deformation area on material formability.

Formability of magnesium alloy plate. Depends on microstructure, chemical composition, preprocessing history and response to processing temperature, strain rate and strain. The response can be characterized by the curve of flow stress as a function of temperature strain rate and strain, or by the equation of cardinality.