Abstract
In this work, a Mg-1.0Mn-1.0Zn (wt.%) alloy with ultra-high strength was prepared by extrusion at 438 K and forging at 453 K. High tensile yield strength of 373 MPa and ultimate tensile strength of 417 MPa were realized with only 2 wt% low-cost alloying element additions, resulting from the closed combination of ultrafine dynamic recrystallized grains, high-density dislocations, nanoscale precipitates and strong texture. It is believed that such a low-temperature deformation method can be widely used to fabricate other low-alloyed Mg alloys with ultra-high strength in industrial fields.
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