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Intermetallic phases can significantly improve the creep resistance ofmagnesium alloys, extending their use to higher temperatures. However, littleis known about the deformation behaviour of these phases at applicationtemperatures, which are commonly below their macroscopicbrittle-to-ductile-transition temperature. In this study, we thereforeinvestigate the activation of different slip systems of the CaMg$_2$ phase andthe occurrence of serrated yielding in the temperature range from 50$^\circ$Cto 250$^\circ$C. A decreasing amount of serrated flow with increasingtemperature suggests that solute atoms govern the flow behaviour when theCaMg$_{2}$ phase is off-stoichiometric.

Plastic deformation of the CaMg$_{2}$ C14-Laves phase from 50-250$^\circ$C