| Abstract: | Cyclic material behaviour of magnesium die castings and extrusions The cyclic deformation behaviour of the die castings AZ91 and AE42 and the extrusions AZ31 and AZ80 is investigated in strain controlled tension compression tests. The main topic of this investigation is the verification of the Masing and Memory behaviour. These two material properties are necessary for the component design by the local strain concept. The two die castings show approximately Masing behaviour, but the hysteresis of magnesium is different from the hysteresis of steel. For extrusions a totally different behaviour in tension and in compression direction can be observed. The hysteresis in experiment differs from the calculated hysteresis from the cyclic stress strain curve. The Masing behaviour is not observed because of the strong anisotropic behaviour in tension and in compression direction. All investigated magnesium alloys show the material memory M2. |
