Abstract
Magnesium alloys containing rare earth elements have better properties in terms of of formability, strength and corrosion resistance. Due to the tight supply situation these elements should be partially or complete substituted, for example by calcium. Microstructural studies of casted alloys of new compositions, and the influence of various heat treatments on their microstructure are investigated. The mechanical properties of the rolled materials are also presented and discussed. The works presented in this paper are results of the ongoing BMBF project SubSEEMag.
Highlights
The application of rare earth elements in Magnesium alloys leads to a significant increase of strength, ductility, creep resistance and corrosion resistance compared to classic alloys like the AZ31 [1]
The poor plastic deformability of common magnesium sheet materials is caused by its pronounced rolling texture and is the reason why until now there are only a few applications of magnesium sheets especially in the automotive industry. The reason for this is the limited number of deformation systems that could be activated in magnesium crystals for plastic deformation at low temperatures [2, 3]
The heat treatment tests show the influence of different temperatures on the various microstructures in the as cast state
Summary
The application of rare earth elements in Magnesium alloys leads to a significant increase of strength, ductility, creep resistance and corrosion resistance compared to classic alloys like the AZ31 [1]. Magnesium alloys containing rare earth elements have better properties in terms of formability, strength and corrosion resistance. Rare earth elements containing magnesium alloys show the demanded randomized texture and fine-grained microstructure [4,5,6].
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