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<p>Zinc alloys exhibit favorable degradation rates and biocompatibility, thus rendering them a subject of considerable research interest in the field of biodegradable metallic materials. The present study developed a Zn-0.5Mn-0.2&#xa0;Mg alloy and subjected it to plastic deformation via forward extrusion (FE) at different temperatures. The influence of extrusion temperature on the microstructure and properties of the alloy was systematically investigated using optical microscopy (OM), x-ray diffraction (XRD), scanning electron microscopy (SEM), electron back scatter diffraction (EBSD), and mechanical property testing. After FE at 100, 150, 200, and 250&#xa0;°C, the average grain sizes of the alloy were measured to be 1.68 ± 1.03, 2.58 ± 1.77, 5.90 ± 2.87, and 8.21 ± 4.92&#xa0;μm, respectively. Phase analysis confirmed the presence of <i>α</i>-Zn, MnZn<sub>13</sub>, and Mg<sub>2</sub>Zn<sub>11</sub>. The Mg<sub>2</sub>Zn<sub>11</sub> phase formed continuous bands along grain boundaries, encapsulating the initially blocky MnZn<sub>13</sub> phase which underwent fragmentation during extrusion. The improvement in strength is primarily attributed to grain refinement strengthening and dislocation strengthening. Furthermore, it has been revealed that the reduction in ductility results from the cracking of Zn–Mn phases induced by FE, combined with the fracture of Zn–Mg phases during tensile deformation.</p>

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Investigation on Microstructure and Mechanical Properties of Forward-Extruded Zn–Mn–Mg Alloys

  • 期刊论文

  • 发表日期：

    2026年6月2日

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  • Jiawei Guo,
  • Xiao Chen,
  • Fengjian Shi,
  • Zhongfu Huang,
  • Tianxiang Chen,
  • Jiang Liu,
  • Yi Wang

摘要

Zinc alloys exhibit favorable degradation rates and biocompatibility, thus rendering them a subject of considerable research interest in the field of biodegradable metallic materials. The present study developed a Zn-0.5Mn-0.2 Mg alloy and subjected it to plastic deformation via forward extrusion (FE) at different temperatures. The influence of extrusion temperature on the microstructure and properties of the alloy was systematically investigated using optical microscopy (OM), x-ray diffraction (XRD), scanning electron microscopy (SEM), electron back scatter diffraction (EBSD), and mechanical property testing. After FE at 100, 150, 200, and 250 °C, the average grain sizes of the alloy were measured to be 1.68 ± 1.03, 2.58 ± 1.77, 5.90 ± 2.87, and 8.21 ± 4.92 μm, respectively. Phase analysis confirmed the presence of α-Zn, MnZn13, and Mg2Zn11. The Mg2Zn11 phase formed continuous bands along grain boundaries, encapsulating the initially blocky MnZn13 phase which underwent fragmentation during extrusion. The improvement in strength is primarily attributed to grain refinement strengthening and dislocation strengthening. Furthermore, it has been revealed that the reduction in ductility results from the cracking of Zn–Mn phases induced by FE, combined with the fracture of Zn–Mg phases during tensile deformation.