MECHANICAL PROPERTIES OF MG ALLOYS AMX602 AND AZXE7111 UNDER QUASI-STATIC AND DYNAMIC LOADING

摘要

Mg and its alloys have drawn great interest in the materialscommunity due to their high specific strength and potentialapplications in industry. In this work, we present someexperimental results on two Mg-alloys, AMX602 and AZXE7111.We have evaluated the dependence of the mechanical propertiesof these alloys on the extrusion temperatures under both quasistatic(strain rate ～1×10~(-3) s~(-1)) and dynamic (strain rate ～4×10~3 s~(-1))uniaxial compressive loadings. We have observed that the quasistaticyield strength of AMX602 exhibits a slight dependence onthe extrusion temperature, whereas the ultimate strength and thedeformation-to-failure do not show such dependence. On the otherhand, the dependence of the mechanical properties of AZXE7111is much more complicated. We have also found that thedeformation-to-failure of both alloys increases at increased strainrate. For comparison, we have tested two conventional Mg-alloys,WE43 and AZ91C under very similar conditions. We have foundthat AMX602 and AZXE7111 show significantly improvedmechanical properties compared to WE43 and AZ91C undereither quasi-static or dynamic loading. Such knowledge isparticularly important for applications involving impact loading.