Mechanical Properties and Friction of AZ31 Magnesium Alloy and Application to the Cylidrical Deep Drawing Process

Abstract

The mechanical properties such as stress-strain curves and anisotropic parameters at different elevated temperatures are obtained by the computerized screw universal testing machine. The friction testing machine is used to determine the friction coefficient between die and AZ31 sheets at different elevated temperatures. The finite element method is used to investigate the earing of the deep drawing process. In order to verify the prediction of FEM simulation of the earing in the cylindrical cup drawing process, the experimental parameters such as stress-strain curves, anisotropic parameters, fiction coefficient and blank holder force, are as the input data during analysis. The experimental cup height compared with the current simulation result of cylindrical deep drawing process at different elevated temperature.

Mechanical and Tribological Analysis of Anodized AZ31 Magnesium Alloy as a Function of a Cement Concrete Environment

“…Therefore, stage II is known as the stable zone or sliding distance. Once the roughness of both surfaces is smoothed, the surface of the less hard material, in this case the coated system AZ31/MgO (AZ31 anodized), is molded to the surface of the harder material (alumina pin), thus reducing the friction coefficient until the start of the steady state [21,22]. Figure 4b shows the friction coefficient variation as a function of the anodizing current density.…”

“…From the scratch test, the adhesion strength of the anodized MgO coating was characterized taking into account two terms: the critical load LC1, which is defined as the load where the first cracks occur (cohesive failure); and the upper critical load LC2, where the delamination occurs at the edge of the scratch track (adhesive failure) [21,22]. Many authors have tried to find an expression that relates different variables that are present in the scratch test, such as Holmberg, who has proposed one model where the friction between the layer and the scratch indenter and the mechanical properties of the layer are taken into account [24].…”