Abstract

• Different Zn wires with diameters of 0.3, 0.5, 1.0, 4.0, and 6.0 mm were prepared. • The highest ultimate tensile strength (144.6 MPa) occurred for diameter of 0.3 mm. • Smallest grain size (4.71 μm for diameter of 6.0 mm) delivered 120% fracture strain. • Tensile deformation relies on combined effects of grain refinement, LAGBs, and twins. The high purity Zn wires with different diameters (i.e. 0.3, 0.5, 1.0, 4.0, and 6.0 mm) were prepared through extrusion and/or cold drawing. Then, mechanical response was investigated via sophisticated tensile tests, followed by materials characterization. Tensile deformation shows that grain refinement played a significant role in the Zn wires with diameters of 4.0 and 6.0 mm. Regarding the Zn wires with 0.3, 0.5, and 1.0 mm in diameter, the corresponding tensile properties (i.e. strength and ductility) were mainly attributed to the synergism of grain refinement, low-angle grain boundaries, and twins.

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