AZ31 magnesium alloy sheets were prepared by low-speed extrusion at different temperatures, i.e., 350 °C, 400 °C, and 450 °C. The microstructure evolution and mechanical properties of extruded AZ31 magnesium alloy sheets were studied. Results indicate that the low-speed extrusion obviously improved the microstructure of magnesium alloys. As the extrusion temperature decreased, the grain size for the produced AZ31 magnesium alloy sheets decreased, and the (0001) basal texture intensity of the extruded sheets increased. The yield strength and tensile strength of the extruded sheets greatly increased as the extrusion temperature decreased. The AZ31 magnesium alloy sheet prepared by low-speed extrusion at 350 °C exhibited the finest grain size and the best mechanical properties. The average grain size, yield strength, tensile strength, and elongation of the extruded sheet prepared by low-speed extrusion at 350 °C were ~2.7 μm, ~226 MPa, ~353 MPa, and ~16.7%, respectively. These properties indicate the excellent mechanical properties of the extruded sheets prepared by low-speed extrusion. The grain refinement effect and mechanical properties of the extruded sheets produced in this work were obviously superior to those of magnesium alloys prepared using traditional extrusion or rolling methods reported in other related studies.

中文翻译：

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不同温度低速挤压AZ31镁合金薄板的组织演变和力学性能

AZ31镁合金薄板是通过在不同温度（即350°C，400°C和450°C）下进行低速挤压而制备的。研究了挤压AZ31镁合金薄板的组织演变和力学性能。结果表明，低速挤压明显改善了镁合金的显微组织。随着挤出温度的降低，所生产的AZ31镁合金板的晶粒尺寸减小，并且挤出板的（0001）基础织构强度增加。随着挤出温度降低，挤出片材的屈服强度和拉伸强度大大提高。通过在350°C下低速挤出制备的AZ31镁合金薄板表现出最佳的晶粒尺寸和最佳的机械性能。平均晶粒度，屈服强度，抗拉强度，在350℃下通过低速挤出制备的挤出片材的伸长率和伸长率分别为〜2.7μm，〜226MPa，〜353MPa和〜16.7％。这些性能表明通过低速挤出制备的挤出片材的优异的机械性能。在这项工作中生产的挤压板的晶粒细化效果和机械性能明显优于其他相关研究中报道的使用传统挤压或轧制方法制备的镁合金。