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HEAs’ compositional space allows the design of hierarchical microstructures that contribute to the exceptional strength values.

In this study we report novel results obtained with an extruded fine-grained Mg-2.5 at.% Y alloy(FG Mg-2.5Y) exhibiting tension/compression yield symmetryand reduced strength differential, in addition to well-balanced strength and ductility. On the basis of detailed postmortem transmission electron microscopy studies, atom probe tomography, andelectron backscattered diffraction (EBSD) characterization,we propose that the presence of a supersaturated solid solution strengthening for basal slip, and the enhanced activity of prismatic slip are the major causes for the unusual mechanical behavior.

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