Abstract
Magnesium is the lightest metal used for construction elements. Due to their lightness and good mechanical properties magnesium alloys have been used in aviation industry since 50’s of the last century. Magnesium – Lithium alloys are the lightest of all magnesium alloys. Their density can be lower than 1,0 g/cm3. In this paper the results of numerical simulation of direct extrusion of Mg-Li alloy hollow profile are presented. The alloy has 12% addition of Lithium and has been extruded through porthole dies. The analysis of temperature distribution, metal flow and stress and strain with the use of Finite Element Method (FEM) have been calculated in Deform 3D software. The mathematical simulation have been performed for various ingot temperatures and the die’s geometry. Thanks to numerical simulation, the optimal temperature and die geometry have been determined and due to this fact the optimal stress conditions in a welding chamber have been obtained
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